Solution p-doped fluorescent polymers for enhanced charge transport of hybrid organic-silicon nanowire photovoltaics

Pei Ting Tsai, Ming Chin Li, Yi Chun Lai, Wei Hsuan Tseng, Chih I. Wu, Si Han Chen, Yi Cheng Lin, Yu Cheng Chen, Rui Chung Hsiao, Sheng Fu Horng, Pei-Chen Yu*, Hsin-Fei Meng

*此作品的通信作者

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

The solution p-type doping of various conjugated polymers and small molecules via blending with tetrafluorotetracyano-quinodimethane (F4-TCNQ) is investigated to facilitate hole transport for hybrid organic-silicon-nanowire solar cells. Among all, the highly-fluorescent conjugated polymers such as poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) demonstrate superior transport characteristics, where both the device fill-factor and power conversion efficiency (PCE) are positively correlated with the doping concentration. The best PCE achieves 13.66% from the device with 30% p-doped PFO, compared to the reference at 12.50%. The enhancement is ascribed to the efficient interfacial charge-carrier recombination with minimal energy losses. A vertically graded doping profile is further revealed with F4-TCNQ molecules preferentially accumulated near the silicon surface.

原文English
頁(從 - 到)246-253
頁數8
期刊Organic Electronics
34
DOIs
出版狀態Published - 1 7月 2016

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