Fluorinated copolymer PCPDTBT with enhanced open-circuit voltage and reduced recombination for highly efficient polymer solar cells

…, S Inal, P Pingel, K Fostiropoulos, N Koch…

文献索引：Albrecht, Steve; Janietz, Silvia; Schindler, Wolfram; Frisch, Johannes; Kurpiers, Jona; Kniepert, Juliane; Inal, Sahika; Pingel, Patrick; Fostiropoulos, Konstantinos; Koch, Norbert; Neher, Dieter Journal of the American Chemical Society, 2012 , vol. 134, # 36 p. 14932 - 14944

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被引用次数: 241

摘要

A novel fluorinated copolymer (F-PCPDTBT) is introduced and shown to exhibit significantly higher power conversion efficiency in bulk heterojunction solar cells with PC70BM compared to the well-known low-band-gap polymer PCPDTBT. Fluorination lowers the polymer HOMO level, resulting in high open-circuit voltages well exceeding 0.7 V. Optical spectroscopy and morphological studies with energy-resolved transmission electron ...