This conference on Photonics for Energy covers fundamental and applied research areas focused on the applications of photonics for renewable energy harvesting, conversion, storage, distribution, monitoring, consumption, and efficient usage, etc. Energy utilization and optoelectronic conversion play important roles in daily life and modern society, and have also become hot research topics. This conference will provide a remarkable opportunity for scientists to present their recent progresses on photonics for energy. The solicited exemplary topics include, but are not limited to: ;
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Conference 11893

Photonics for Energy

In person: 10 - 12 October 2021
On demand now
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  • Opening Ceremony and Plenary Session I
  • 1: Photonics for Energy I
  • Plenary Session II
  • 2: Photonics for Energy II
  • 3: Photonics for Energy III
  • 4: Photonics for Energy IV
  • Poster Session
  • 5: Photonics for Energy V
  • 6: Photonics for Energy VI
  • 7: Photonics for Energy VII
  • 8: Photonics for Energy VIII
Opening Ceremony and Plenary Session I
In person / Livestream: 10 October 2021 • 09:00 - 12:00 China Standard Time
9:00: Opening Ceremony
9:20: Awards and Recognition

11900-501
Author(s): Rebecca R. Richards-Kortum, Director, Rice 360 Institute for Global Health Technologies (United States), Rice Univ. (United States)
In person / Livestream: 10 October 2021 • 09:30 - 10:10 China Standard Time
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This talk will examine the challenges of designing and translating new low-cost optical technologies to improve global health equity, drawing from examples to improve newborn survival in African hospitals, to improve early detection of cervical cancer for women in Texas and Latin America, and to improve point-of-care diagnosis of COVID-19. The talk will summarize lessons learned to increase the diversity of innovation teams, and to increase the impact and sustainability of the resulting innovations.
Tea/Coffee Break 10:10 - 10:40
11890-502
Author(s): Wentao Wang, State Key Lab. of High Field Laser Physics (China), CAS Ctr. for Excellence in Ultra-intense Laser Science (China), Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (China)
In person: 10 October 2021 • 10:40 - 11:20 China Standard Time
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X-ray free-electron lasers can generate intense and coherent radiation at wavelengths down to the sub-ångström region and have become indispensable tools for applications in structural biology and chemistry, among other disciplines. Several X-ray free-electron laser facilities are in operation; however, their requirement for large, high-cost, state-of-the-art radio-frequency accelerators has led to great interest in the development of compact and economical accelerators. Laser-wakefield accelerators can sustain accelerating gradients more than three orders of magnitude higher than those of radio-frequency accelerators, and are regarded as an attractive option for driving compact X-ray free-electron lasers. However, the realization of such devices remains a challenge owing to the relatively poor quality of electron beams that are based on a laser-wakefield accelerator. After ten years of efforts, we present an experimental demonstration of undulator radiation amplification in the exponential-gain regime by using electron beams based on a laser-wakefield accelerator.
11893-503
Author(s): Rui Zhu, Peking Univ. (China)
In person: 10 October 2021 • 11:20 - 12:00 China Standard Time
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Perovskite solar cells have attracted tremendous attention in recent years due to the high device performance and the superior optoelectronic properties of perovskite materials. In this talk, I will give an introduction about the advances of perovskite solar cells. Then, I will present our efforts on improving the device performance and understanding the device physics of perovskite solar cells. In addition, I will also discuss the advantages of perovskite solar cells for space aircraft application. We have some preliminary efforts of sending the perovskite solar cells into near space. I will share our view about the exciting possibilities for perovskite solar cell technology.
Break
Lunch Break 12:00 - 13:20
Session 1: Photonics for Energy I
In person: 10 October 2021 • 13:20 - 15:20 China Standard Time
Session Chair: Haiming Zhu, Zhejiang Univ. (China)
11893-1
Author(s): Qinye Bao, East China Normal Univ. (China)
In person: 10 October 2021 • 13:20 - 13:40 China Standard Time
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Interface in perovskite solar cells play a critical role in many key electronic processes, e.g. charge injection/extraction, and recombination, significantly governing the final PCE and lifetime. In this talk, we will show our recent work on the electronic structures at perovskite interface.
11893-2
Author(s): Lixin Xiao, Peking Univ. (China)
In person: 10 October 2021 • 13:40 - 14:00 China Standard Time
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We first fabricated double perovskite Cs2AgBiBr6 based planar heterojunction solar cell by a low-pressure assisted solution method under ambient condition, which presents a highest PCE of 1.44%. In addition, UV-protective transparent solar cell based on Cs2AgBiBr6 was fabricated, a PCE up to 1.56% and an AVT of 73% were achieved, which is the best performing solar cells reported yet with AVT exceeding 70%. Besides, we demonstrated a record Voc of 0.88 V and PCE of 2.80% in planar heterojunction AgBiI4 solar cell, in which lithium bis(trifluoromethylsulfonyl)-imide (Li-TFSI) was employed as precursor additive to obtain a fully covered pinhole-free AgBiI4 film. Recently, we also reviewed Bi-based halide materials and their devices, where structural and optoelectronic properties are summarized and highlighted.
11893-3
Author(s): Jingbi You, Institute of Semiconductors (China)
In person: 10 October 2021 • 14:00 - 14:20 China Standard Time
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Perovskite solar cells with different bandgaps of absorber need to be studied for making efficient single or tandem solar cells. In this talk, I will talk about efficient perovskite solar cells with various bandgaps.
11893-4
Author(s): Yonghua Chen, Nanjing Univ. of Technology (China)
In person: 10 October 2021 • 14:20 - 14:40 China Standard Time
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Solvent is vital to control crystallization and crystal growth of the state-of-the-art solution-processed hybrid organic-inorganic perovskites. However, researchers just focus on the highly toxic and coordinating solvents (e.g., dimethylformamide, dimethylsulfoxide, and g-butyrolactone) and the based modification (e.g., antisolvent), which may hinder the success of perovskite solar cells (PSCs) in practical applications, and a largely serious unexplored challenge remains until now. Here, we report an alternative environment-friendly ionic liquid as a novel solvent for facile fabrication of PSCs in ambient air.Dense and pinhole-free perovskite films with high reproducibility can be readily prepared by simple one-step method without anti-solvent even under the relative humidity over 80%. The findings may open up a new approach for further improving PSCs performance with higher reproducibility and reliability in ambient atmosphere.
11893-5
Author(s): Mingzhen Liu, Univ. of Electronic Science and Technology of China (China)
In person: 10 October 2021 • 14:40 - 15:00 China Standard Time
11893-6
Author(s): Cheng Li, Xiamen Univ. (China)
In person: 10 October 2021 • 15:00 - 15:20 China Standard Time
Break
Tea/Coffee Break 15:20 - 15:30
Plenary Session II
In person / Livestream: 10 October 2021 • 15:30 - 16:20 China Standard Time
15:30: Welcome and Introduction

Q&A period will follow after the talk
11905-504
Author(s): Peter L. Knight, Blackett Lab., Imperial College London (United Kingdom), UK National Quantum Technology Strategic Advisory Board for UKRI (United Kingdom)
In person / Livestream: 10 October 2021 • 15:35 - 16:05 China Standard Time
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The UK through a mix of government and industry funding has committed more than £1Bn over 10 years to a coordinated programme in quantum technology. Seven years into this programme I will describe here how we got there, and our goals for the future. The UK National Quantum Technology Programme has induced a step change in the UK’s capabilities for pushing forward a new sector in future information technologies. I describe how the programme arose and the activities it supported and influenced to deliver these new capabilities, building on a first phase almost £480M investment across several UK government agencies. The UK programme is now in its second phase, with a further substantial investment by UK government and global industries in the UK making a total of over £1Bn. I will describe our plans for ensuring the advanced quantum science and demonstrator platforms in imaging, sensing, communications and computing developed over the past seven years will drive the formation of the QT sector and embed quantum tech in a broad range of industries. References 1. “Blackett Review: The Quantum Age: technological opportunities.” Government Office for Science, Available: https://www.gov.uk/government/publications/quantum-technologies-blackett-review; https://uknqt.ukri.org/files/strategicintent2020/; Peter Knight and Ian Walmsley 2019 Quantum Sci. Technol. 4 040502
Break
Tea/Coffee Break 16:20 - 16:30
Session 2: Photonics for Energy II
In person: 10 October 2021 • 16:30 - 18:10 China Standard Time
Session Chair: Qinye Bao, East China Normal Univ. (China)
11893-7
Author(s): Haiming Zhu, Zhejiang Univ. (China)
In person: 10 October 2021 • 16:30 - 16:50 China Standard Time
11893-8
Author(s): Yiqiang Zhan, Fudan Univ. (China)
In person: 10 October 2021 • 16:50 - 17:10 China Standard Time
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Metal-halide perovskite which has the structure of ABX3, has become one of the most intensively studied optoelectronic materials, especially in the application of solar cell. Most of the perovskite solar cell with high efficiency are based on the mixed A cations or X ions. However, this comes at the cost of long-term stability, due to the loss of volatile methylammonium and phase segregations. It has been reported that the α-FAPbI3 has the ideal cubic crystal structure, and lower band gap compared to mixed cation perovskite. However, the black α-FAPbI3 is unstable at room temperature, easy to transform to photo inactive δ-FAPbI3. Therefore, obtaining efficient and stable FAPbI3 PSCs is of vital importance for the perovskite research field. Here, we report a novel sequential deposition method employing MASCN vapour treatment of yellow phase FAPbI3 perovskite films for making highly crystallized, pure black phase FAPbI3 PSCs and achieve a power conversion efficiency up to 23.5%.
11893-9
Author(s): Tao Chen, Univ. of Science and Technology of China (China)
In person: 10 October 2021 • 17:10 - 17:30 China Standard Time
11893-10
Author(s): Hairen Tan, Nanjing Univ. (China)
In person: 10 October 2021 • 17:30 - 17:50 China Standard Time
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Organic-inorganic halide perovskites have received widespread attention thanks to their strong light absorption, long carrier diffusion lengths, tunable bandgaps, and low temperature processing. Single-junction perovskite solar cells (PSCs) have achieved a boost of the power conversion efficiency (PCE) from 3.8% to 25.5% in just a decade. With the continuous growth of PCE in single-junction PSCs, exploiting of monolithic all-perovskite tandem solar cells is now an important strategy to go beyond the efficiency available in single-junction PSCs. In this talk, I will summarize our recent research progress in monolithic all-perovskite tandem solar cells from the perspectives of different structural units in the device: tunnel recombination junction, wide-bandgap top subcell, and narrow-bandgap bottom subcell. I will also present our strategies in fabricating all-perovskite triple-junction solar cells, in which the perovskite layers are all solution processed.
11893-11
Author(s): Xinbo Yang, Soochow Univ. (China)
In person: 10 October 2021 • 17:50 - 18:10 China Standard Time
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In this work, we investigate the possibility of using the metal compounds, which are frequently employed on emerging PV devices (e.g., organic and perovskite PV devices) for carrier extraction, to replace the p-n junctions on c-Si solar cells. The surface passivation, carrier-selective transport characteristics of atomic-layer deposited titanium oxide (TiO2), titanium oxynitride (TiOxNy) and vanadium oxide (VOx) on c-Si are investigated. Interestingly, TiO2 and TiOxNy are demonstrated to be an effective electron-selective contact due to a suitable band alignment with c-Si, while VOx is proven to be a hole-selective contact thanks to its high work function. By implementing a full-area TiO2, TiOxNy or VOx contact, replacing the phosphorus- or boron-diffused p-n junctions, a high PCE of 22.1%, 22.3% and 21.6% are achieved on n-type c-Si solar cells with a simplified fabrication process.
11893-12
Author(s): Wei Zhang, Univ. of Surrey (United Kingdom)
On demand
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Perovskite solar cells (PSCs) with an inverted planar architecture have gained enormous attention due to their easy fabrication, simplified device structure, and compatibility with flexible substrates, large-scale production, or tandem cells. The focus of this talk will be on the development of high-performance single-junction inverted PSCs based on a low cost and solution-processable hole transport layer poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)benzidine] (poly-TPD). The devices have been systematically investigated, consisting of fabrication and optimization, interface modification, and long-term stability. The study aims to increase the open-circuit voltage and power conversion efficiency of the fabricated devices, and disclose their degradation pathway through a range of optical and electrical characterization.
Session 3: Photonics for Energy III
In person: 11 October 2021 • 08:30 - 10:10 China Standard Time
Session Chair: Yongbo Yuan, Central South Univ. (China)
11893-13
Author(s): Yongzhe Zhang, Beijing Univ. of Technology (China)
In person: 11 October 2021 • 08:30 - 08:50 China Standard Time
11893-14
Author(s): Fuzhi Huang, Wuhan Univ. of Technology (China)
In person: 11 October 2021 • 08:50 - 09:10 China Standard Time
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Perovskite solar cells have drawn great attention due to their excellent photoelectric properties, high power conversion efficiency and low manufactory cost. Scalable fabrication of large area high-efficiency and stable perovskite solar modules is still a challenge, which is mostly attributed to the difficulty in fabricating large-area high-quality dense perovskite films. Since the nucleation and crystal growth behaviors of the perovskite is undesignable and hard to control, it is generally to achieve a porous film with dendrites. Here, we have tried to fabricate large-area high-quality perovskite films by various approaches, from labscale spin-coating to scalable coating methods, including two-step blading and one step slot-die coating. With study on the nucleation and crystal growth of perovskites, efficient mini-module with efficiency above 20% is achieved.
11893-15
Author(s): Qingfeng Dong, Jilin Univ. (China)
In person: 11 October 2021 • 09:10 - 09:30 China Standard Time
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Organic-inorganic halide perovskites (OIHPs) are recognized as the promising next-generation X-ray detection materials. However, the device performance is largely limited by the ion-migration issue of OIHPs. Here, we reported a simple atomistic surface passivation strategy with methylammonium iodide (MAI) to remarkably increase the ion-migration activation energy of CH3NH3PbI3 single crystals. Our findings will allow for the dramatically enhanced X-ray detection ability in medical imaging applications.Meanwhile, by suppressing the ionic defect with low ion migration effect, we achieved stable co-planar structured single crystal perovskite solar cell with high operational stability.
11893-16
Author(s): Qin Hu, Univ. of Science and Technology of China (China); Wei Chen, The Univ. of Hong Kong (China); Wenqiang Yang, Peking Univ. (China); Yu Li, Univ. of Science and Technology of China (China); Feng Liu, Shanghai Jiao Tong Univ. (China); Zhubing He, Southern Univ. of Science and Technology of China (China); Rui Zhu, Peking Univ. (China); Thomas P. Russell, Lawrence Berkeley National Lab. (United States)
In person: 11 October 2021 • 09:30 - 09:50 China Standard Time
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Simultaneously improving device efficiency and stability is the most important issue in perovskite solar cells (PSCs) research. Here, we strategically introduce a multi-functional interface layer (MFIL) with integrated roles of: (1) electron transport, (2) moisture barrier, (3) near-infrared photocurrent enhancement, (4) trap passivation, and (5) ion migration suppression to enhance the device performance. The narrow-band-gap non-fullerene acceptor, Y6, was screened out to replace the most commonly used PCBM in the in-verted PSCs. A significantly improved power conversion efficiency of 21.0% was achieved, along with a remarkable stability without encapsulation under various external stimuli. These results offer deep insights for designing advanced interlayers and establish the correlations between molecular orientation, interface molecular bonding, trap state density, non-radiation recombination, and the device performance.
11893-17
Author(s): Hua Dong, Jingrui Li, Zhaoxin Wu, Xi'an Jiaotong Univ. (China)
In person: 11 October 2021 • 09:50 - 10:10 China Standard Time
11893-18
Author(s): Yabing Qi, Okinawa Institute of Science and Technology Graduate Univ. (Japan)
On demand
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It has been slightly over a decade since metal halide perovskite materials were first used in solar cells. Nowadays it has become one of the most active research fields and continues to progress rapidly on various fronts. My group at OIST is making efforts to use surface science and advanced material characterization techniques to obtain in-depth understanding about perovskite materials and devices. In this talk, I will present our research progress on surface science understanding of perovskite materials and stability.
Break
Tea/Coffee Break 10:10 - 10:40
Session 4: Photonics for Energy IV
In person: 11 October 2021 • 10:40 - 12:00 China Standard Time
Session Chair: Qin Hu, Univ. of Science and Technology of China (China)
11893-20
Author(s): Yiwang Chen, Jiangxi Normal Univ. (China)
In person: 11 October 2021 • 10:40 - 11:00 China Standard Time
11893-21
Author(s): Yongbo Yuan, Central South Univ. (China)
In person: 11 October 2021 • 11:00 - 11:20 China Standard Time
11893-22
Author(s): Chenyi Yi, Tsinghua Univ. (China)
In person: 11 October 2021 • 11:20 - 11:40 China Standard Time
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Perovskite solar cells attracted great attentions due to their high power conversion efficiency and low cost. However, most of the research on perovskite solar cells are based on solution process, such as spin-coating, which is not suitable for large-area devices and need a lot of toxic or hazard organic solvent. In this talk, I will show our recent progresses on fabricating high efficiency stable perovskite solar cells by vacuum evaporation, which can eliminate the toxic organic solvents and is compatible with large-area devices.
11893-23
Author(s): PengYi Tang, Shanghai Institute of Microsystem and Information Technology (China)
In person: 11 October 2021 • 11:40 - 12:00 China Standard Time
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Engineering the surface and interface structure of catalysts is a promising strategy for boosting the photoelectrochemical water splitting performance. Specifically, constructing hematite nanowires heterojunctions and manipulating the atomic structure of 2D materials could greatly enhance the water oxidation and HER performance of water splitting. Systemic structural and mechanistic investigation about the surface and interfaces of catalysts may pave the way for further exploring high performance full water splitting device.
11893-19
Author(s): Yuanyuan Zhou, Hong Kong Baptist Univ. (Hong Kong, China)
On demand
Break
Lunch Break 12:00 - 13:30
Poster Session
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
Conference attendees are invited to attend the poster session on Monday afternoon. Come view the posters, ask questions, and network with colleagues in your field. Authors of poster papers will be present to answer questions concerning their papers. Attendees are required to wear their conference registration badges to the poster session.

Poster Setup: Monday 10:00 to 13:00
View poster presentation guidelines and set-up instructions at
https://spie.org/PA/poster-presentation-instructions
11893-45
Author(s): Yawei Kuang, Changshu Institute of Technology (China)
On demand | Presented Live 11 October 2021
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Perovskite solar cells are used in silicon-based tandem solar cells due to their tunable band gap, high absorption coefficient and low preparation cost. However, the relatively large optical refractive index of bottom silicon, in comparison with that of top perovskite absorber layers, results in significant reflection losses in two-terminal devices. Therefore, light management is crucial to improve photocurrent absorption in the Si bottom cell. We show the schematic drawings of perovskite silcion tandem solar cells with nanocones array. The parameters of the silicon nanocone array are represented by the diameter of top angle, the height (h). The periodicity (P) was fixed as 300nm. The thickness of active perovskite was selected as 200nm. The thickness of silicon substrate was fixed as 150µm, respectively. Numerical simulations are performed using the FDTD package.
11893-46
Author(s): Xiaoyu Yang, Rui Zhu, Peking Univ. (China)
On demand | Presented Live 11 October 2021
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Understanding the fundamental properties of buried interfaces in perovskite photovoltaics is of paramount importance to the enhancement of device performance. Nevertheless, accessing buried interfaces poses sizeable challenges because of their non-exposed feature. In this work, the buried mysteries in devices will be unveiled by a series of dedicated techniques. By establishing the microstructure–property relations, the buried losses are systematically presented, which are induced by both the sub-microscale extended imperfections and lead-halide inhomogeneities. Furthermore, a brand new mechanism for the most popular ammonium-halide post-treatment is explored and called the molecule-assisted microstructural reconstruction, which could considerably mitigate the buried imperfections.
11893-47
Author(s): Jie Liang, Nanjing Univ. (China)
On demand | Presented Live 11 October 2021
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Active plasmonic nanostructures have garnered considerable interest in physics, chemistry, and material science due to the dynamically switchable capability of plasmonic responses. Here, the first electrically dynamic control of magnetic plasmon resonance (MPR) through structure transformation by selective deposition of lithium on a metal–insulator–metal (MIM) structure is reported. Distinct optical switching between MPR and surface plasmon polariton (SPP) excitations can be enabled by applying a proper electrical current to the electrochemical cell. Furthermore, the structure transformation through lithium metal deposition indicates the reconfigurable MPR excitation in full cycling of the charging and discharging process. The results may shed light on electrically compatible self-powered active plasmonics as well as nondestructive optical sensing for electrochemical evolution.
11893-48
Author(s): Qing Zhao, Peking Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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The open-circuit voltage (VOC) of perovskite solar cells (PSCs) has been reported to be significantly weakened by the carrier loss at the films surface. Here, the moisture condensation at only the upper surface of perovskite films was controlled by constructing an ultra-low surface temperature. Then, the type-I band alignment could be formed at surface grain boundaries due to the etching effect of trace amounts of condensed moisture. The beneficially constructed surface type-I band alignment could effectively repel carriers and return them to the inside of the grain, significantly avoiding the carrier loss at films surface. As a result, a superior carrier lifetime exceeding 2.5 μs was obtained and the VOC of PSC was remarkably boosted from 1.07 to 1.17 V. The minimum VOC deficit of only 0.39 V enables a substantial gain in power conversion efficiency (PCE) from 20.2% to 22.4% in one-step spin coating methods. Moreover, this innovation is versatile and a champion PCE of 23.2% was also a
11893-49
Author(s): Lei Zhu, Xia Xiong, Ming Zhang, Feng Liu, Shanghai Jiao Tong Univ. (China)
On demand | Presented Live 11 October 2021
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Charge transport, extraction, and collection play important roles in the working process of organic solar cells (OSCs), and the interface engineering is one of the key factors to realize the high-throughput printing fabrication of OSCs. The structure design or doping of electrode interlayer materials can effectively suppress the recombination of carriers at the interface and improve the ohmic contact between the active layer and the electrodes, which is a useful method to achieve a high power conversion efficiency (PCE). PFN-Br is a widely used alcohol-soluble cathode interlayer material. By doping PFN-Br with melamine (MA), the charge extraction efficiency and nongeminate recombination at the cathode interface are successfully optimized. Finally, the device efficiencies of PM6:Y6 and PM6:BTP-eC9 are increased to an amazing 17.44% and 18.58%, respectively. This work provides a new strategy for the fabrication of high-efficiency OSCs.
11893-50
Author(s): Ming Zhang, Lei Zhu, Feng Liu, Shanghai Jiao Tong Univ. (China)
On demand | Presented Live 11 October 2021
11893-51
Author(s): Kang An, Lei Ying, Fei Huang, Yong Cao, South China Univ. of Technology (China)
On demand | Presented Live 11 October 2021
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How processing solvents influence the overall photovoltaic performances of polymer solar cells (PSCs) remains unclear in various recently emerged new material systems. Here we systematically studied this issue by integrating an extensively used P3HT, or a recently developed conjugated polymer P2F-EHp, with different non-fullerene acceptors. An impressive power conversion efficiency (PCE) of 7.1% was achieved in P3HT:O-IDTBR based devices with the non-halogenated solvent, 2-methylanisole. Moreover, devices consisting of blade-coating P2F-EHp:IT-4F (or IT-4Cl) realized a remarkable PCE of over 10%. Morphology investigation demonstrated that optimization of non-halogenated processing solvents manipulated crystal coherent lengths and phase separations for corresponding blends, and facilitating the charge generation and transport. These results indicated that using non-halogenated solvents is a promising candidate for constructing efficient PSCs toward practical applications.
11893-52
Author(s): Rui Zhu, Peking Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Perovskite solar cells have attracted tremendous attentions in recent years due to the high device performance and the superior optoelectronic properties of perovskite materials. In this contribution, I will show our efforts on the advances of perovskite solar cell technology.
11893-53
Author(s): Hua Liu, Luoyang Electro-optical Equipment Research Institute (China)
On demand | Presented Live 11 October 2021
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In many fields of physics, the inverse source problem is common, that is, to retrieve the lost phase information from the measured intensity distribution of optical or electrical signal or the scattering differential cross section, so as to reconstruct the full wave function. Phase recovery of imaging system is one of the typical problems. The model and experiment based on the theory, and the results show that the system can meet the application requirements of MTF, REA and RMS. It's an effective solution
11893-54
Author(s): Venkata Seshaiah Katta, Vishnuvardhan Reddy Chappidi, Sai Santosh Kumar Raavi, Indian Institute of Technology Hyderabad (India)
On demand
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A comprehensive investigation of improved performance of Samarium (Sm3+)-doped TiO2 based energy conversion devices is presented. An all-inclusive characterization of Sm-TiO2 samples established the best electrical conductivity exhibited by Sm (0.3%)-TiO2. The photoanodes based on Sm-TiO2 are deposited on FTO substrates and are used to fabricate DSSC and PEC devices. DSSC devices with Sm(0.3%)-TiO2 exhibited η: 6.4% which is twice that exhibited by undoped-TiO2 devices. Similarly, PEC devices presented higher current density at 1.2V vs RHE potential for Sm(0.3%)-TiO2. This enhancement is corroborated with the EIS measurements revealing lower charge-transfer resistance values for Sm(0.3%)-TiO2 devices
Session 5: Photonics for Energy V
In person: 11 October 2021 • 14:30 - 16:10 China Standard Time
Session Chair: Ke Gao, Shandong Univ. (China)
11893-24
Author(s): Feng Liu, Shanghai Jiao Tong Univ. (China)
In person: 11 October 2021 • 14:30 - 14:50 China Standard Time
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With the development of non-fullerene acceptors (NFAs), the power conversion efficiency (PCE) of organic solar cells (OSCs) has been continuously improved and has exceeded 18%. A critical step to realize high-efficiency devices is to control the complex non-equilibrium morphology of the photo active layer, to match the domain sizes with excitons, carriers, and other photoelectron physical kinetics, and to suppress the loss channels. Multi-length-scale morphology plays a key role in photon-to-electron conversion, the details and effect of which will be discussed.
11893-25
Author(s): Xiaozhang Zhu, Institute of Chemistry (China)
In person: 11 October 2021 • 14:50 - 15:10 China Standard Time
11893-26
Author(s): Chunfeng Zhang, Nanjing Univ. (China)
In person: 11 October 2021 • 15:10 - 15:30 China Standard Time
11893-27
Author(s): Xiangjian Wan, Nankai Univ. (China)
In person: 11 October 2021 • 15:30 - 15:50 China Standard Time
11893-28
Author(s): Tao Wang, Wuhan Univ. of Technology (China)
In person: 11 October 2021 • 15:50 - 16:10 China Standard Time
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Organic solar cells (OSCs) evidence a rapid progress in recent years with the emergence of non-fullerene acceptors (NFAs), reaching a maximum power conversion efficiency over 18%. The complex chemical structure of A-D-A type NFAs cast versatile stacking forms, i.e. H aggregation, A-to-A type and A-to-D type J aggregation, A-to-A type and A-to-D type clusters. The H aggregation blue-shifts the absorption spectrum, whilst the J aggregation red-shifts the absorption spectrum and construct three-dimensional π−π stacked network at the molecular level for efficient charge transport. We demonstrate how these different aggregations can be controlled experimentally, in particular the heating and solution induced aggregation strategies, in different OSC systems. The modulation of molecular stacking and aggregation of NFAs can effectively tune its absorption and optoelectronic properties, and provides a crucial guidance for further developments of high performance OSCs.
Break
Tea/Coffee Break 16:10 - 16:20
Session 6: Photonics for Energy VI
In person: 11 October 2021 • 16:20 - 18:00 China Standard Time
Session Chairs: Feng Liu, Shanghai Jiao Tong Univ. (China), Lei Ying, South China Univ. of Technology (China)
11893-29
Author(s): Meijing Li, Baobing Fan, Lei Ying, Fei Huang, Yong Cao, South China Univ. of Technology (China)
In person: 11 October 2021 • 16:20 - 16:40 China Standard Time
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The rise of halogenated organic semiconducting materials has triggered a significant enhancement in power conversion efficiency of organic solar cells. Herein, two wide-bandgap polymers containing an electron-deficient [1,2,3]triazolo[4,5-f]isoindole-5,7(2H,6H)-dione (TzBI) unit were developed, by introducing a halogen atom into the thienyl side chain of the copolymerized benzo[1,2-b:4,5-b′]dithiophene unit. The organic solar cell device based on PClT-EHp:Y6 blend present a remarkable current density of 27.3 mA cm−2 and an impressively high internal quantum efficiency of approaching 100% at the wavelength of 820 nm, both of which are among the highest values reported for single-junction organic solar cells. Moreover, devices prepared from PClT-EHp and the Y6-derivative, Y6DT produces a further enhanced efficiency of 16.4%, demonstrating the efficacy of delicate materials design toward high-performance binary organic solar cells.
11893-30
Author(s): Yaowen Li, Soochow Univ. (China)
In person: 11 October 2021 • 16:40 - 17:00 China Standard Time
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The power conversion efficiencies (PCEs) of perovskite and organic solar cells are improved significantly. However, they are limited by their poor thermal/moisture and light stability due to their photoactive layer containing organic components and prevailing defects. The molecular structures of organic semiconductors can be easily tuned to realize various functions for tuning opto-electronic properties, passivating perovskite defects, optimizing device energy levels as well as enhancing device flexibility.
11893-31
Author(s): Ke Gao, Shandong Univ. (China)
In person: 11 October 2021 • 17:00 - 17:20 China Standard Time
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With developments in materials, thin-film processing, fine-tuning of morphology, and optimization of device fabrication, the performance of OSCs has improved markedly in recent years. Designing low-bandgap materials have been a focus in order to maximize solar energy conversion. However, there are only a few successful low-bandgap donor materials developed with near-infrared (NIR) absorption that are well matched to the existing efficient acceptors. Porphyrin has shown great potential as a useful building block for constructing low-bandgap donor materials due to its large conjugated plane and strong absorption. Porphyrin-based donor materials have been shown to contribute to many record-high efficiencies in tandem, ternary, flexible, and OSC/perovskite hybrid solar cells. In this talk, current advances in the rational design, morphology, dynamics, and multi-functional applications of low-bandgap porphyrins will be reviewed in relation to their potential impact on device performance.
11893-32
Author(s): Jianlong Xia, Wuhan Univ. of Technology (China)
In person: 11 October 2021 • 17:20 - 17:40 China Standard Time
11893-33
Author(s): Jiang Huang, Univ. of Electronic Science and Technology of China (China)
In person: 11 October 2021 • 17:40 - 18:00 China Standard Time
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Improving the absorption efficiency of the active layer is an important way to improve the conversion efficiency of optoelectronic devices. For this reason, we propose an optical micro cavity device with columnar microstructure, which increases the photocurrent from 25 mA / cm2 to 27.8 MA / cm2, and the photoelectric conversion efficiency from 15.5% to 17.5%. In addition, to solve the problems of low photon energy utilization and high voltage loss in a single optoelectronic device, we propose a prism optical model, which can absorb high-energy to low-energy photons by sub cells composed of different optical band gap active layers, thus effectively reducing the thermodynamic loss of high-energy photons. The open circuit voltage of the prismatic splitter reaches 5.3v, which increases the conversion efficiency of the perovskite photoelectric device by 20%.
11893-34
Author(s): Feng Gao, Linköping Univ. (Sweden)
On demand
Session 7: Photonics for Energy VII
In person: 12 October 2021 • 08:45 - 10:00 China Standard Time
Session Chairs: Meijie Chen, Central South Univ. (China), Guangming Tao, Huazhong Univ. of Science and Technology (China)
11893-35
Author(s): Jia Zhu, Nanjing Univ. (China)
In person: 12 October 2021 • 08:45 - 09:05 China Standard Time
11893-36
Author(s): Guangming Tao, Huazhong Univ. of Science and Technology (China); Yaoguang Ma, Zhejiang Univ. (China); Shaoning Zeng, Huazhong Univ. of Science and Technology (China); Xin Li, China Textile Academy (China); Sijie Pian, Zhejiang Univ. (China)
In person: 12 October 2021 • 09:05 - 09:25 China Standard Time
11893-37
Author(s): Dan Pang, Xingyu Chen, Meijie Chen, Hongjie Yan, Central South Univ. (China)
In person: 12 October 2021 • 09:25 - 09:45 China Standard Time
11893-38
Author(s): Cun-Hai Wang, Hao Chen, Univ. of Science and Technology Beijing (China)
In person: 12 October 2021 • 09:45 - 10:00 China Standard Time
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A high-performance thermoelectric system is designed based on radiative cooling and greenhouse effects. The performance of the designed system is experimentally evaluated and the weather condition effects are investigated. Radiative cooling is used to reduce the temperature of the cold end, meanwhile, the greenhouse effect is utilized to increase the temperature hot end of the thermoelectric generator (TEG), to increase the temperature difference between the cold and hot ends, and thus the output power. Experimental results show that a stable temperature drop of ~1.1 ℃ of the cold end is achieved via the radiative cooling effect at night. Due to the greenhouse effect, the temperature increase of the hot end reaches a max value of 13.9 ℃. The TEG device has better performance in lower humidity environment.
Break
Tea/Coffee Break 10:00 - 10:30
Session 8: Photonics for Energy VIII
In person: 12 October 2021 • 10:30 - 11:45 China Standard Time
Session Chairs: Mingjian Yuan, Nankai Univ. (China), Chuanjiang Qin, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (China)
11893-41
Author(s): Fushan Li, Fuzhou Univ. (China)
In person: 12 October 2021 • 10:30 - 10:50 China Standard Time
11893-42
Author(s): Chuanjiang Qin, Changchun Institute of Applied Chemistry (China)
In person: 12 October 2021 • 10:50 - 11:10 China Standard Time
11893-43
Author(s): Mingjian Yuan, Nankai Univ. (China)
In person: 12 October 2021 • 11:10 - 11:30 China Standard Time
11893-44
Author(s): Zhijun Ning, Xianyuan Jiang, Hansheng Li, ShanghaiTech Univ. (China)
In person: 12 October 2021 • 11:30 - 11:45 China Standard Time
11893-40
Author(s): Hin-Lap Yip, City Univ. of Hong Kong (Hong Kong, China)
On demand
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Metal halide perovskite light-emitting diodes (PeLEDs) show great potentials to be the next-generation lighting technology, with external quantum efficiencies (EQEs) exceeding 20% for infrared, red and green LEDs. However, the efficiencies of blue and white devices severely lag behind. To improve the performance of blue PeLEDs, we employed an integrated strategy combining dimensional engineering of perovskite film and recombination zone modulation to improve the blue LED device efficiency. In our latest work, we demonstrated efficient white PeLEDs by optically coupling the blue PeLED with a red emitting perovskite nanocrystal layer in an advanced device structure, which allows to extract the trapped optical modes (waveguide and SPP modes) of blue photons in the device to the red perovskite layer via near-field effects. As a result, a white PeLEDs with EQE over 10% is achieved, which represents the state-of-the-art performance for white PeLEDs.
Conference Chair
Peking Univ. (China)
Conference Chair
Univ. of Cambridge (United Kingdom)
Conference Chair
Nanjing Univ. of Technology (China)
Program Committee
Seoul National Univ. (Korea, Republic of)
Program Committee
Qihua Xiong
Tsinghua Univ. (China)
Program Committee
Yabing Qi
Okinawa Institute of Science and Technology Graduate Univ. (Japan)
Program Committee
Anita Ho-Baillie
The Univ. of Sydney (Australia)
Program Committee
Osman M. Bakr
King Abdullah Univ. of Science and Technology (Saudi Arabia)
Program Committee
Sheng Xu
Univ. of California, San Diego (United States)
Program Committee
Feng Gao
Linköping Univ. (Sweden)
Program Committee
Nanjing Univ. (China)
Program Committee
Michael Saliba
Univ. Stuttgart (Germany), Forschungszentrum Jülich (Germany)
Program Committee
Wolfgang R. Tress
Zurich Univ. of Applied Sciences (Switzerland)
Program Committee
Columbia Univ. (United States)
Program Committee
Beijing Institute of Technology (China)
Program Committee
Wei Zhang
Univ. of Surrey (United Kingdom)
Program Committee
Feng Liu
Shanghai Jiao Tong Univ. (China)
Program Committee
City Univ. of Hong Kong (Hong Kong, China)
Program Committee
Jingshan Luo
Nankai Univ. (China)
Program Committee
Zhi-Kuang Tan
National Univ. of Singapore (Singapore)
Program Committee
Guichuan Xing
Univ. of Macau (Macao, China)
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