Liu Chunyu, Li Zhiqi, Zhang Zhihui, Zhang Xinyuan, Shen Liang, Guo Wenbin, Zhang Liu, Long Yongbing, Ruan Shengping
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
College of Instrumentation & Electrical Engineering, Jilin University, 938 Ximinzhu Street, Changchun 130061, People's Republic of China.
Phys Chem Chem Phys. 2016 Dec 21;19(1):245-250. doi: 10.1039/c6cp07344a.
Tetrafluoro-tetracyanoquinodimethane (F4-TCNQ), a strong molecular acceptor, has been proved to be an excellent candidate to achieve the p-type doping effect. When F4-TCNQ is incorporated into a poly(3-hexylthiophene) (P3HT): indene-C bisadduct (ICBA) active layer, superior behavior upon inducing polymer donor excited electron transport is demonstrated due to the addition of a deep-lying lowest unoccupied molecular orbital (LUMO) from F4-TCNQ, leading to the realization of organic solar cells (OSCs) with an improved power conversion efficiency (PCE) of 5.83%, accounting for 29.6% enhancement. In the system of active layer, the low LUMO of F4-TCNQ can easily accept electrons, remarkably reducing electron/hole recombination, which contributes to the enhancement of the photoconductivity and charge carrier mobility, resulting in higher short-circuit current density (J), and achieving a more balanced charge carrier transport, as well as an ideal fill factor (FF).
四氟四氰基喹二甲烷（F4-TCNQ）是一种强分子受体，已被证明是实现p型掺杂效应的优秀候选材料。当F4-TCNQ被引入聚（3-己基噻吩）（P3HT）：茚-C双加合物（ICBA）活性层时，由于F4-TCNQ引入了一个深的最低未占据分子轨道（LUMO），在诱导聚合物供体激发电子传输方面表现出优异性能，从而实现了功率转换效率（PCE）提高至5.83%的有机太阳能电池（OSC），增幅达29.6%。在活性层体系中，F4-TCNQ的低LUMO能轻易接受电子，显著减少电子/空穴复合，这有助于提高光电导率和电荷载流子迁移率，从而得到更高的短路电流密度（J），实现更平衡的电荷载流子传输以及理想的填充因子（FF）。
