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Interface engineering for large-area planar perovskite solar cells (Conference Presentation)

Paper Abstract

The formation of pinhole-free perovskite photoactive films with full surface coverage has been a tremendous challenge for up-scaling planar perovskite solar cells (PSCs) while maintaining their high power conversion efficiencies (PCEs). Particularly, a significant mismatch between the surface energies of a hydrophilic perovskite precursor solution and a hydrophobic organic charge transport layer (CTL) has been a major cause for the poor and random surface coverage of perovskite photoactive films, which drastically reduces the scalability and reproducibility of PSCs. Here, we report a universal method to create extremely compact perovskite photoactive films on a variety of hydrophobic CTLs. By introducing an amphiphilic conjugated polyelectrolyte as an interfacial compatibilizer, we succeed in improving the wettability of perovskite precursor solutions on hydrophobic CTLs and fabricating perovskite photoactive films over large areas. Our approach enables the scalable fabrication of planar PSCs with large areas (1 cm2, PCE of 17%) while preserving nearly 90% of the PCEs of the corresponding small-area devices (PCE of 19%).

Paper Details

Date Published: 19 September 2017
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Proc. SPIE 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII, 1036314 (19 September 2017); doi: 10.1117/12.2273845
Show Author Affiliations
Jinho Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Soonil Hong, Gwangju Institute of Science and Technology (Korea, Republic of)
Eunhag Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Hongkyu Kang, Gwangju Institute of Science and Technology (Korea, Republic of)
Kwanghee Lee, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 10363:
Organic, Hybrid, and Perovskite Photovoltaics XVIII
Zakya H. Kafafi; Paul A. Lane; Kwanghee Lee, Editor(s)

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