High efficiency polymer solar cells with internal quantum efficiency approaching 100%

Sung Heum Park; Mario Leclerc; Alan J. Heeger; Kwanghee Lee

doi:10.1117/12.825836

27 August 2009 High efficiency polymer solar cells with internal quantum efficiency approaching 100%

Sung Heum Park, Mario Leclerc, Alan J. Heeger, Kwanghee Lee

Proceedings Volume 7416, Organic Photovoltaics X; 74160P (2009) https://doi.org/10.1117/12.825836
Event: SPIE Photonic Devices + Applications, 2009, San Diego, California, United States

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; J_sc = 10.6 mA/cm², V_oc = 0.88 V, FF = 0.66 and η_e = 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.

Citation Download Citation

Sung Heum Park, Mario Leclerc, Alan J. Heeger, and Kwanghee Lee "High efficiency polymer solar cells with internal quantum efficiency approaching 100%", Proc. SPIE 7416, Organic Photovoltaics X, 74160P (27 August 2009); https://doi.org/10.1117/12.825836

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