标题：Role of Central Metal Ions in 8-Hydroxyquinoline-Doped ZnO Interfacial Layers for Improving the Performance of Polymer Solar Cells
作者：Babu, B. Hari; Lyu, Chengkun; Yu, Chengzhuo; Wen, Zhenchuan; Li, Fenghong; Hao, Xiao-Tao
作者机构：[Babu, B. Hari; Lyu, Chengkun; Wen, Zhenchuan; Hao, Xiao-Tao] Shandong Univ, State Key Lab Crystal Mat, Sch Phys, Jinan 250100, Shandong, Peoples R Ch 更多
通讯作者：Hao, XT;Hao, XT;Hao, XiaoTao
通讯作者地址：[Hao, XT]Shandong Univ, State Key Lab Crystal Mat, Sch Phys, Jinan 250100, Shandong, Peoples R China;[Hao, XT]Univ Melbourne, Sch Chem, ARC Ctr Excell 更多
来源：ADVANCED MATERIALS INTERFACES
关键词：AFM; organic solar cells; PL; PTB7:PC71BM; PTB7-Th:PC71BM; XPS
摘要：Optimizing the function of interfacial materials between the photoactive layer and the metal cathode is critical for realizing high-efficiency organic solar cells (OSCs). The charge-collecting layer requires a material with an excellent electrical property to improve the charge collection efficiency and decrease the leakage current that increases the power conversion efficiency (PCE). In this study, the performance of sol-gel-derived modified cathode interfacial (ZnO) layers, prepared by an appropriate doping of metal (M = Al, Ga, and Mn) Symbol of the Klingon Empire quinoline (Q) groups in OSCs, is demonstrated and evaluated. The light absorption of the photoactive layer is improved upon incorporating an interfacial layer into the OSCs. The PCE of the GaQ:ZnO-based device is higher than that of the AlQ:ZnO and MnQ:ZnO-based devices, attributed to an improved exciton dissociation rate, enhanced carrier transport, greater electron mobility, and a lower work function. Incorporating a GaQ:ZnO interfacial layer into a thieno[3,4-b]thiophene/benzodithiophene:[6,6]-phenyl-C-71-butyric acid methyl ester (PTB7:PC71BM) OSC increases the PCE from 7.51% to 8.44%, and incorporating it into a poly[[2,6 '-4-8-di(5-ethylhexylthienyl)benzo[1,2-b:3,3-b]dithiophene][3-fluoro-2[(2-ethylhexyl) carbonyl]thieno[3,4-b]thiophenediyl:[6,6]-phenyl-C-71-butyric acid methyl ester (PTB7-Th:PC71BM) (PTB7-Th:PC71BM) OSC increases the PCE from 8.11% to 9.02%.