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Proceedings Paper

High efficiency polymer solar cells with internal quantum efficiency approaching 100%
Author(s): Sung Heum Park; Mario Leclerc; Alan J. Heeger; Kwanghee Lee
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Paper Abstract

We report the fabrication and measurement of solar cells with 6% power conversion efficiency using the alternating copolymer, poly[N-9''-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole), PCDTBT, in bulk heterojunction (BHJ) composites with the fullerene derivative [6,6]-phenyl C70-butyric acid methyl ester (PC70BM). The PCDTBT/PC70BM solar cells exhibit the best performance of any BHJ system studied to date; Jsc = 10.6 mA/cm2, Voc = 0.88 V, FF = 0.66 and ηe = 6.1% under air mass 1.5 global (AM 1.5G) irradiation of 100 mW/cm2. The internal quantum efficiency (IQE) is close to 100%, implying that essentially every absorbed photon results in a separated pair of charge carriers and that all photogenerated carriers are collected at the electrodes.

Paper Details

Date Published: 27 August 2009
PDF: 10 pages
Proc. SPIE 7416, Organic Photovoltaics X, 74160P (27 August 2009); doi: 10.1117/12.825836
Show Author Affiliations
Sung Heum Park, Univ. of California, Santa Barbara (United States)
Gwangju Institute of Science and Technology (Korea, Republic of)
Mario Leclerc, Univ. Laval (Canada)
Alan J. Heeger, Univ. of California, Santa Barbara (United States)
Gwangju Institute of Science and Technology (Korea, Republic of)
Kwanghee Lee, Univ. of California, Santa Barbara (United States)
Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7416:
Organic Photovoltaics X
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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