Different methods to fabricate efficient planar perovskite solar cells based on solution-processing Nb2O5 as electron transporting layer

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Guo, Heng^1 ; Yang, Jian^1 ; Pu, Bingxue^1 ; Zhang, Haiyan^1 ; Niu, Xiaobin^1,2

State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China^1

Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, China^2

关键词: Electron transporting layer;    Low temperature solutions;    Perovskite films;    Photovoltaic performance;    Solar cell efficiencies;    Solar cell performance;    Solution-processing;    Working mechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/5/052005/pdf
DOI  :  10.1088/1755-1315/108/5/052005

来源: IOP

【 摘 要 】

Organo-lead perovskites as light harvesters have represented a hot field of research on high-efficiency perovskite solar cells. Previous approaches to increasing the solar cell efficiency have focused on optimization of the morphology of perovskite film. In fact, the electron transporting layer (ETL) also has a significant impact on solar cell performance. Herein, we introduce a facile and low temperature solution-processing method to deposit Nb2O5 film as ETL for PSCs. Based on Nb2O5 ETL, we investigate the effect of the annealing time for the perovskite films via different solution processing, relating it to the perovskite film morphology and its influence on the device working mechanisms. These results shed light on the origin of photovoltaic performance voltage in perovskite solar cells, and provide a path to further increase their efficiency.