Interfacial charge-transfer engineering by ionic liquid for high performance planar CH3NH3PbBr3 solar cells

作     者：Xiaojia Zheng Wei Yu Shashank Priya 

作者机构：Center for Energy Harvesting Materials and SystemVirginia TechBlacksburgVirginia 24061United States State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian116023LiaoningChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2018年第27卷第3期

页      面：748-752页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial support from the Institute for Critical Technology and Applied Science(ICTAS) the financial support from Office of Naval Research(I.Perez)through grant number N000141613043 the supports of National Natural Science Foundation of China under grant no.61604152 

主　　题：Perovskite solar cell Ionic liquid Interface engineering Titanium dioxide 

摘      要：The energy barrier at the CH3NH3Pb Br3/TiO2interface hinders the electron transfer from CH3NH3Pb Br3to compact TiO2（cp-TiO2）.Ionic liquid（IL）,that forms dipoles pointing away from TiO2,can adjust the work function of TiO2resulting in suitable energy level for charge transfer from CH3NH3Pb Br3to *** time-resolved photoluminescence spectroscopy（TRPL）measurements confirm faster electron transfer from the CH3NH3Pb Br3film to TiO2after modification by *** cells based on IL modified cp-TiO2demonstrate efficiency of～6%,much higher than the devices（0.2%）fabricated using untreated cp-TiO2as the electron transport layer.