Enhanced charge collection with ultrathin AlOx electron blocking layer for hole-transporting material-free perovskite solar cell
Literature Information
Huiyun Wei, Jiangjian Shi, Xin Xu, Junyan Xiao, Jianheng Luo, Juan Dong, Songtao Lv, Lifeng Zhu, Huijue Wu, Dongmei Li, Yanhong Luo, Qingbo Meng, Qiang Chen
An ultrathin AlOx layer has been deposited onto a CH3NH3PbI3 film using atomic layer deposition technology, to construct a metal–insulator–semiconductor (MIS) back contact for the hole-transporting material-free perovskite solar cell. By optimization of the ALD deposition cycles, the average power conversion efficiency (PCE) of the cell has been enhanced from 8.61% to 10.07% with a highest PCE of 11.10%. It is revealed that the improvement in cell performance with this MIS back contact is mainly attributed to the enhancement in charge collection resulting from the electron blocking effect of the AlOx layer.
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