Effect of Core Size on Performance of Fused-Ring Electron Acceptors,Chemistry of Materials

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Effect of Core Size on Performance of Fused-Ring Electron Acceptors
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-07-02 00:00:00 , DOI: 10.1021/acs.chemmater.8b02222
Shuixing Dai ₁ , Yiqun Xiao ₂ , Peiyao Xue ₁ , Jeromy James Rech ₃ , Kuan Liu ₁ , Zeyuan Li ₁ , Xinhui Lu ₂ , Wei You ₃ , Xiaowei Zhan ₁

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We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, morphological, and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorption spectra, upshift of the energy levels, and enhancement of molecular packing and electron mobility. From 5 to 9 fused rings, the core size extension can simultaneously enhance open-circuit voltage (V_OC), short-circuit current density (J_SC), and fill factor (FF) of organic solar cells (OSCs). The best efficiency of the binary-blend devices increases from 5.6 to 11.7%, while the best efficiency of the ternary-blend devices increases from 6.3 to 12.6% as the acceptor core size extends.

中文翻译：

磁芯尺寸对融合环电子受体性能的影响

我们报告了4个稠环电子受体（FREAs），它们具有相同的端基和侧链，但核心不同，其大小范围为5至11个稠环。磁芯尺寸对FREA的电子，光学，电荷传输，形态和光伏特性有相当大的影响。扩展核的尺寸会导致吸收光谱的红移，能级的上移以及分子堆积和电子迁移率的增强。从5到9个熔合环，铁芯尺寸的扩展可以同时提高开路电压（V _OC），短路电流密度（J _SC），以及有机太阳能电池（OSC）的填充系数（FF）。随着受体核尺寸的扩大，二元混合设备的最佳效率从5.6增加到11.7％，而三元混合设备的最佳效率从6.3增加到12.6％。

更新日期：2018-07-02

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