Abstract A1-D-A2-D-A1 type of structured BT-CMCN, which consists of an electron-deficient benzothiadiazole (BT) (A2), electron-rich thiophene (D) and electron-deficient dicyanomethylene-4H-chromene (CMCN) (A1) moiety, was synthesized. BT-CMCN showed pretty good thermal stability with the onset of decomposition temperatures of 304 °C at 5 wt % loss. The optical and electrochemical properties were investigated that reveal the HOMO/LUMO energy levels of BT-CMCN are −5.29 eV/−3.58 eV with the optical band gap of 1.72 eV. The HOMO/LUMO energy levels of BT-CMCN are higher than those of PC71BM. The best performance based on BT-CMCN/PC71BM in inverted-type organic solar cells (OSCs) exhibits the PCE of 0.69% with a short-circuit current density (Jsc) of 2.03 mA/cm2, Voc of 0.79 V, and fill factor (FF) of 42.7%.

中文翻译：

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苯并噻二唑基小分子的合成及其光伏性能

摘要 A1-D-A2-D-A1 型结构化 BT-CMCN，由缺电子苯并噻二唑 (BT) (A2)、富电子噻吩 (D) 和缺电子二氰基-4H-色烯 (CMCN) 组成) (A1) 部分，合成。BT-CMCN 显示出非常好的热稳定性，分解温度为 304 °C，损失为 5%。研究了光学和电化学性质，表明 BT-CMCN 的 HOMO/LUMO 能级为 -5.29 eV/-3.58 eV，光学带隙为 1.72 eV。BT-CMCN 的 HOMO/LUMO 能级高于 PC71BM。基于 BT-CMCN/PC71BM 在倒置型有机太阳能电池 (OSC) 中的最佳性能表现出 0.69% 的 PCE、2.03 mA/cm2 的短路电流密度 (Jsc)、0.79 V 的 Voc 和填充因子(FF) 的 42.7%。