Bilayer photoanode approach for efficient In2O3 based planar heterojunction perovskite solar cells

被引：31

作者：

Chen, Peng ^{[1
]}

Yin, Xingtian ^{[1
]}

Que, Meidan ^{[1
]}

Yang, Yawei ^{[1
]}

Liu, Xiaobin ^{[1
]}

Que, Wenxiu ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Elect Mat Res Lab, Sch Elect & Informat Engn, Minist Educ,Key Lab,Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 735卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Perovskite solar cell; TiCl4; In2O3; Bilayer; PASSIVATION; STABILITY;

D O I：

10.1016/j.jallcom.2017.11.205

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Indium oxide (IO) has been demonstrated as an efficient and stable electron transporting layer for planar heterojunction perovskite solar cells, but dispersive pinholes in the sol-gel derived IO film limit its hole blocking capacity and corresponding device performance. In this study, we introduce an ultrathin TiOx interlayer between Indium Tin Oxide (ITO) substrate and IO film via a low temperature TiCl4 treatment method. By optimizing the process time, we obtain the optimal perovskite solar cells with a 30 min TiCl4 treatment process, showing an impressive power conversion efficiency of 16.38%. In addition, the average device efficiency is improved from 13.7% to 15.1%, which is mainly attributed to the greatly improved fill factor. By means of investigating film roughness, pinhole effect and open circuit voltage decay, we find that the low-temperature processed TiOx interlayer efficiently enhance the hole blocking capacity of the electron transporting layer, and consequently boost the device performance. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：938 / 944

页数：7

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