Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability

被引：37
作者：
Chen, Min [2 ,3 ]
Dong, Qingshun [1 ]
Xiao, Chuanxiao [2 ]
Zheng, Xiaopeng [2 ]
Dai, Zhenghong [3 ]
Shi, Yantao [1 ]
Luther, Joseph M. [2 ]
Padture, Nitin P. [3 ]
机构：
[1] Dalian Univ Technol, Dept Chem, State Key Lab Fine Chem, Sch Chem Engn, Dalian 116024, Peoples R China
[2] Natl Renewable Energy Lab, Golden, CO 80401 USA
[3] Brown Univ, Sch Engn, Providence, RI 02912 USA
来源：
ACS ENERGY LETTERS | 2022年 / 7卷 / 07期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
HALIDE PEROVSKITES; PASSIVATION; CRYSTALS; QUALITY; GROWTH;
D O I：
10.1021/acsenergylett.2c01130
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：
Here we demonstrate an innovative compositional and interfacial engineering approach to achieve Pb-free flexible perovskite solar cells (f-PSCs) with an unprecedented combination of the highest efficiency reported to date (10.43%), together with enhanced operational stability and mechanical reliability. The key to this approach is alloying of an FASnI(3) metal halide perovskite (MHP) thin film with Ge2+ to stabilize the Sn2+ oxidation state in the MHP, together with the use of a NiOx hole-transport layer. We show that this results in the in situ formation of a thin amorphous GeO2 native oxide layer at the NiOx/FASn(0.9)Ge(0.1)I(3) interface. This layer not only passivates that critical interface but also enhances the interfacial mechanical bonding.
引用
收藏
页码：2256 / 2264
页数：9
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