Influence of a UV-ozone treatment on amorphous SnO2 electron selective layers for highly efficient planar MAPbI3 perovskite solar cells

被引：37

作者：

Jung, Kyungeun ^{[2
]}

Kim, Du Hyeon ^{[1
]}

Kim, Jaemin ^{[3
]}

Ko, Sunglim ^{[3
]}

Choi, Jae Won ^{[4
]}

Kim, Ki Chul ^{[4
]}

Lee, Sang-Geul ^{[5
]}

Lee, Man-Jong ^{[1
,2
]}

机构：

[1] Konkuk Univ, Dept Chem, Seoul 05029, South Korea

[2] Konkuk Univ, Dept Adv Technol Fus, Seoul 05029, South Korea

[3] Konkuk Univ, Dept Mech Design & Prod Engn, Seoul 05029, South Korea

[4] Konkuk Univ, Div Chem Engn, Seoul 05029, South Korea

[5] Korea Basic Sci Inst, Daegu Ctr, Daegu 41566, South Korea

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 59卷

基金：

新加坡国家研究基金会;

关键词：

UV-ozone; Amorphous SnO2; Electron selective layers; Planar perovskite solar cells; Hysteresis; TRANSPORTING LAYER; TIN OXIDE; PERFORMANCE; STABILITY; FILMS;

D O I：

10.1016/j.jmst.2020.04.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of ultraviolet-ozone (UVO) irradiation on amorphous (am) SnO2 and its impact on the photoconversion efficiency of MAPbI(3)-based perovskite solar cells were investigated in detail. UVO treatment was found to increase the amount of chemisorbed oxygen on the am-SnO2 surface, reducing the surface energy and contact angle. Physicochemical changes in the am-SnO2 surface lowered the Gibbs free energy for the densification of perovskite films and facilitated the formation of homogeneous perovskite grains. In addition, the Fermi energy of the UVO-treated am-SnO2 shifted upwards to achieve an ideal band offset for MAPbI(3), which was verified by theoretical calculations based on the density functional theory. We achieved a champion efficiency of 19.01 % with a statistical reproducibility of 17.01 +/- 1.34 % owing to improved perovskite film densification and enhanced charge transport/extraction, which is considerably higher than the 13.78 +/- 2.15 % of the counterpart. Furthermore, UVO-treated, am-SnO2-based devices showed improved stability and less hysteresis, which is encouraging for the future application of up-scaled perovskite solar cells. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：195 / 202

页数：8

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