Small molecule based: N -phenyl carbazole substituted diketopyrrolopyrroles as donors for solution-processed bulk heterojunction organic solar cells

Yuvraj Patil, Rajneesh Misra*, Fang-Chung Chen, Ganesh D. Sharma

*此作品的通信作者

研究成果: Article同行評審

20 引文 斯高帕斯(Scopus)

摘要

We report two acetylene-bridged small molecules DPP5 and DPP6 with low HOMO-LUMO gaps as donors along with PC71BM as an acceptor for the fabrication of solution-processed bulk heterojunction solar cells. After the optimization, i.e. weight ratio of donor to acceptor and surface treatment of the active layer, we achieved overall power conversion efficiencies up to 4.65% (Jsc = 8.19 mA cm-2, Voc = 0.98 V and FF = 0.58) and 5.73% (Jsc = 9.58 mA cm-2, Voc = 0.98 V and FF = 0.61), for DPP5:PC71BM and DPP6:PC71BM respectively, which are superior to those for the devices based on as-cast active layers. The significant change in the power conversion efficiency is attributed to the improvement in nanoscale morphology, balanced charge transport and charge collection efficiency, induced through the surface treatment.

原文English
頁(從 - 到)22999-23005
頁數7
期刊Physical Chemistry Chemical Physics
18
發行號33
DOIs
出版狀態Published - 2016

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