|Cite this article as:|
|Zhongbao Que, Liang Chu, Shuaibo Zhai, Yifei Feng, Chen Chen, Wei Liu, Ruiyuan Hu, Jing Hu, and Xing’ao Li, Self-assembled TiO2 hole blocking layers for efﬁcient perovskite solar cells, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2361-8|
Self-assembled process for device functional layers is a simple, feasible and energy-saving strategy. In mesoporous PSCs, compact and scaffold TiO2 films generally function as the hole blocking and electron transporting layers, respectively. However, they are both typically generated through high-temperature annealing. Here, we deposited TiO2 compact films by a room-temperature self-assembled process, which were conducted as an effective hole blocking layer for perovskite solar cells. The thickness of TiO2 compact films can be easily controlled by the deposition time. By optimizing the TiO2 compact films (80 nm), the power conversion efficiency of mesoporous perovskite solar cells without and with hole conductor layers was up to 10.66% and 17.95%, respectively. Interestingly, an all-low-temperature planar perovskite solar cell with the self-assembled TiO2 layer achieve power conversion efficiency of 16.42%.