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Effect of Isomerization on High-Performance Nonfullerene Electron Acceptors
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-07-03 , DOI: 10.1021/jacs.8b04027 Jiayu Wang 1 , Junxiang Zhang 2 , Yiqun Xiao 3 , Tong Xiao 4 , Runyu Zhu 1 , Cenqi Yan 1 , Youquan Fu 1 , Guanghao Lu 4 , Xinhui Lu 3 , Seth R. Marder 2 , Xiaowei Zhan 1
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-07-03 , DOI: 10.1021/jacs.8b04027 Jiayu Wang 1 , Junxiang Zhang 2 , Yiqun Xiao 3 , Tong Xiao 4 , Runyu Zhu 1 , Cenqi Yan 1 , Youquan Fu 1 , Guanghao Lu 4 , Xinhui Lu 3 , Seth R. Marder 2 , Xiaowei Zhan 1
Affiliation
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We design and synthesize two isomeric fused-ring electron acceptors, FNIC1 and FNIC2, which have the same end-groups and side-chains, but isomeric fused-nine-ring cores. Subtle changes in the two isomers influence their electronic, optical, charge-transport, and morphological properties. As compared with FNIC1, FNIC2 film exhibits a red-shifted absorption peak at 794 nm (752 nm for FNIC1), larger electron affinity of 4.00 eV (3.92 eV for FNIC1), smaller ionization energy of 5.56 eV (5.61 eV for FNIC1), and higher electron mobility of 1.7 × 10-3 cm2 V-1 s-1 (1.2 × 10-3 cm2 V-1 s-1 for FNIC1). The as-cast organic solar cells based on PTB7-Th:FNIC2 blends exhibit a power conversion efficiency (PCE) of 13.0%, which is significantly higher than that of PTB7-Th:FNIC1-based devices (10.3%). Semitransparent devices based on PTB7-Th:FNIC2 blends exhibit PCEs varying from 9.51% to 11.6% at different average visible transmittance (AVT, 20.3- 13.6%), significantly higher than those of PTB7-Th:FNIC1-based devices (7.58-9.14% with AVT of 20.2- 14.7%).
中文翻译：
异构化对高性能非富勒烯电子受体的影响
我们设计并合成了两种异构稠环电子受体 FNIC1 和 FNIC2，它们具有相同的端基和侧链，但具有异构稠环九环核心。两种异构体的细微变化会影响它们的电子、光学、电荷传输和形态特性。与 FNIC1 相比，FNIC2 薄膜在 794 nm（FNIC1 为 752 nm）处有一个红移吸收峰，更大的电子亲和力为 4.00 eV（FNIC1 为 3.92 eV），电离能更小，为 5.56 eV（FNIC1 为 5.61 eV），和更高的电子迁移率 1.7 × 10-3 cm2 V-1 s-1（FNIC1 为 1.2 × 10-3 cm2 V-1 s-1）。基于 PTB7-Th:FNIC2 混合物的铸态有机太阳能电池的功率转换效率 (PCE) 为 13.0%，明显高于基于 PTB7-Th:FNIC1 的器件 (10.3%)。基于 PTB7-Th 的半透明器件：
更新日期：2018-07-03
中文翻译：
异构化对高性能非富勒烯电子受体的影响
我们设计并合成了两种异构稠环电子受体 FNIC1 和 FNIC2，它们具有相同的端基和侧链，但具有异构稠环九环核心。两种异构体的细微变化会影响它们的电子、光学、电荷传输和形态特性。与 FNIC1 相比，FNIC2 薄膜在 794 nm（FNIC1 为 752 nm）处有一个红移吸收峰，更大的电子亲和力为 4.00 eV（FNIC1 为 3.92 eV），电离能更小，为 5.56 eV（FNIC1 为 5.61 eV），和更高的电子迁移率 1.7 × 10-3 cm2 V-1 s-1（FNIC1 为 1.2 × 10-3 cm2 V-1 s-1）。基于 PTB7-Th:FNIC2 混合物的铸态有机太阳能电池的功率转换效率 (PCE) 为 13.0%，明显高于基于 PTB7-Th:FNIC1 的器件 (10.3%)。基于 PTB7-Th 的半透明器件：
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