An efficient and stable inverted perovskite solar cell involving inorganic charge transport layers without a high temperature procedure

Jien Yang; Jinjin Xu; Qiong Zhang; Zhilin Xue; Hairui Liu; Ruiping Qin; Haifa Zhai; Mingjian Yuan

doi:10.1039/d0ra02583f

An efficient and stable inverted perovskite solar cell involving inorganic charge transport layers without a high temperature procedure

RSC Adv. 2020 May 18;10(32):18608-18613. doi: 10.1039/d0ra02583f. eCollection 2020 May 14.

Authors

Jien Yang^{1

2}, Jinjin Xu¹, Qiong Zhang¹, Zhilin Xue², Hairui Liu², Ruiping Qin², Haifa Zhai², Mingjian Yuan³

Affiliations

¹ Henan Key Laboratory of Photovoltaic Materials, School of Physics, Henan Normal University Xinxiang China yjen@htu.edu.cn.
² School of Materials Science and Engineering, Henan Normal University Xinxiang 453007 China.
³ College of Chemistry, Nankai University Tianjin 300071 China.

Abstract

Despite the successful enhancement in the high-power conversion efficiency (PCE) of perovskite solar cells (PSCs), the poor stability of PSCs is one of the major issues preventing their commercialization. The attenuation of PSCs may be due to the lower heat resistance of the organic charge transport layer and the tendency to aggregate at high temperatures. Here we report cerium oxide (CeO _x ) as an electron transport layer (ETL) prepared through a simple solution processed at a low temperature (∼100 °C) to replace the organic charge transport layer on top of the inverted planar PSCs. The CeO _x layer has excellent charge selectivity and can provide the perovskite film with protection against moisture and metal reactions with the electrode. The solar cell with CeO _x as the electron transport layer has a power conversion efficiency of 17.47%. These results may prove a prospect for practical applications.