High performance non-fullerene polymer solar cells based on PTB7-Th as the electron donor with 10.42% efficiencyElectronic supplementary information (ESI) available: Materials synthesis and characterization, device fabrication and optimization, summary of high-performance PTB7-Th based fullerene and non-fullerene OPVs in the literature. See DOI: 10.1039/c7ta10391c

• Main Authors: Sun, Jia, Zhang, Zhuohan, Yin, Xinxing, Zhou, Jie, Yang, Linqiang, Geng, Renyong, Zhang, Fujun, Zhu, Rihong, Yu, Jiangsheng, Tang, Weihua
• Format: Article
• Language: English
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/c7ta10391c

In this work, we present a structurally defined blue-shift non-fullerene electron acceptor ( ITCT ) matching with PTB7-Th as the electron donor for high-performance fullerene-free polymer solar cells (PSCs). The PTB7-Th/ ITCT blend based bulk-heterojunction (BHJ) devices give an appreciable PCE of 8.23% and a relatively high V OC of 0.96 V without any optimization. Upon device processing with thermal annealing and the addition of 0.1% DIO additive, the active layer achieves a more ordered and crystalline morphology. Consequently, a high PCE of 10.42% has been achieved with a V OC of 0.95 V, a J SC of 15.13 mA cm −2 and a high FF of 0.72. To the best of our knowledge, the PCE of 10.42% is among the highest values reported in the literature to date for non-fullerene PSCs using PTB7-Th as the electron donor. In this work, we present a structurally defined blue-shift non-fullerene electron acceptor ( ITCT ) matching with PTB7-Th as the electron donor for high-performance fullerene-free polymer solar cells (PSCs).