Morphological stabilization by supramolecular perfluorophenyl-C 60 interactions leading to efficient and thermally stable organic photovoltaics

Ming Hung Liao, Che En Tsai, Yu Ying Lai, Fong Yi Cao, Jhong Sian Wu, Chien-Lung Wang, Chain-Shu Hsu, Ian Liau, Yen-Ju Cheng*

*此作品的通信作者

研究成果: Article同行評審

47 引文 斯高帕斯(Scopus)

摘要

A new PC61BM-based fullerene, [6,6]-phenyl-C61 butyric acid pentafluorophenyl ester (PC61BPF) is designed and synthesized. This new n-type material can replace PC61BM to form a P3HT:PC61BPF binary blend or serve as an additive to form a P3HT:PC61BM:PC61BPF ternary blend. Supramolecular attraction between the pentafluorophenyl group of PC 61BPF and the C60 cores of PC 61BPF/PC61BM can effectively suppress the PC61BPF/PC61BM materials from severe aggregation. By doping only 8.3 wt% PC61BPF, device PC61BPF651 exhibits a PCE of 3.88% and decreases slightly to 3.68% after heating for 25 h, preserving 95% of its original value. When PC61BP with non-fluorinated phenyl group is used to substitute PC61BPF, the stabilizing ability disappears completely. The efficiencies of PC61BP651 and PC61BP321 devices significantly decay to 0.44% and 0.11%, respectively, after 25 h isothermal heating. Most significantly, this strategy is demonstrated to be effective for a blend system incorporating a low band-gap polymer. By adding only 10 wt% PC61BPF, the PDTBCDTB:PC71BM-based device exhibits thermally stable morphology and device characteristics. These findings demonstrate that smart utilization of supramolecular interactions is an effective and practical strategy to control morphological evolution.

原文English
頁(從 - 到)1418-1429
頁數12
期刊Advanced Functional Materials
24
發行號10
DOIs
出版狀態Published - 12 3月 2014

指紋

深入研究「Morphological stabilization by supramolecular perfluorophenyl-C 60 interactions leading to efficient and thermally stable organic photovoltaics」主題。共同形成了獨特的指紋。

引用此