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Proceedings Paper

Nanobump assembly for plasmonic organic solar cells
Author(s): Hyung-Jun Song; Kinam Jung; Gunhee Lee; Youngjun Ko; Jong-Kwon Lee; Mansoo Choi; Changhee Lee
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Paper Abstract

We demonstrate novel plasmonic organic solar cells (OSCs) by embedding an easy processible nanobump assembly (NBA) for harnessing more light. The NBA is consisted of precisely size-controlled Ag nanoparticles (NPs) generated by an aerosol process at atmospheric pressure and thermally deposited molybdenum oxide (MoO3) layer which follows the underlying nano structure of NPs. The active layer, spin-casted polymer blend solution, has an undulated structure conformably covering the NBA structure. To find the optimal condition of the NBA structure for enhancing light harvest as well as carrier transfer, we systematically investigate the effect of the size of Ag NPs and the MoO3 coverage on the device performance. It is observed that the photocurrent of device increases as the size of Ag NP increases owing to enhanced plasmonic and scattering effect. In addition, the increased light absorption is effectively transferred to the photocurrent with small carrier losses, when the Ag NPs are fully covered by the MoO3 layer. As a result, the NBA structure consisted of 40 nm Ag NPs enclosed by 20 nm MoO3 layer leads to 18% improvement in the power conversion efficiency compared to the device without the NBA structure. Therefore, the NBA plasmonic structure provides a reliable and efficient light harvesting in a broad range of wavelength, which consequently enhances the performance of organic solar cells.

Paper Details

Date Published: 6 October 2014
PDF: 7 pages
Proc. SPIE 9184, Organic Photovoltaics XV, 91841T (6 October 2014); doi: 10.1117/12.2061323
Show Author Affiliations
Hyung-Jun Song, Seoul National Univ. (Korea, Republic of)
Kinam Jung, Seoul National Univ. (Korea, Republic of)
Gunhee Lee, Seoul National Univ. (Korea, Republic of)
Youngjun Ko, Seoul National Univ. (Korea, Republic of)
Jong-Kwon Lee, Seoul National Univ. (Korea, Republic of)
Mansoo Choi, Seoul National Univ. (Korea, Republic of)
Changhee Lee, Seoul National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9184:
Organic Photovoltaics XV
Zakya H. Kafafi; Paul A. Lane; Ifor D. W. Samuel, Editor(s)

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