Flexible perovskite solar cells with simultaneously improved efficiency, operational stability, and mechanical reliability

被引:166
作者
Dong, Qingshun [1 ]
Chen, Min [2 ]
Liu, Yuhang [3 ]
Eickemeyer, Felix T. [3 ]
Zhao, Weidong [1 ]
Dai, Zhenghong [2 ]
Yin, Yanfeng [4 ]
Jiang, Chen [1 ]
Feng, Jiangshan [5 ]
Jin, Shengye [4 ]
Liu, Shengzhong [5 ]
Zakeeruddin, Shaik M. [3 ]
Gratzel, Michael [3 ]
Padture, Nitin P. [2 ]
Shi, Yantao [1 ]
机构
[1] Dalian Univ Technol, Sch Chem Engn, Dept Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China
[2] Brown Univ, Sch Engn, Providence, RI 02912 USA
[3] Ecole Polytech Fed Lausanne EPFL, Dept Chem & Chem Engn, Lab Photon & Interfaces LPI, CH-1015 Lausanne, Switzerland
[4] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol Dynam, Dalian 116023, Peoples R China
[5] Shaanxi Normal Univ, Shaanxi Key Lab Adv Energy Devices, Shaanxi Engn Lab Adv Energy Technol,Minist Educ, Sch Mat Sci & Engn,Key Lab Appl Surface & Colloid, Xian 710119, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
HALIDE PEROVSKITES; BEHAVIOR; FILMS;
D O I
10.1016/j.joule.2021.04.014
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
Although great progress is being made toward improving the power conversion efficiency (PCE) and the operational stability of perovskite solar cells (PSCs), little attention is being paid to their mechanical reliability, which is particularly important for flexible PSCs (f-PCSs). Here, we have grown low-dimensional (LD) metal-halide perovskite (MHP) thin capping layer over the 3D MHP light-absorber thin film in f-PSCs in situ to improve their mechanical reliability. This resulted in f-PSCs with unprecedented, simultaneous improvements in PCE (21.0%), operational stability (T90, retention of 90% of the initial PCE, >800 h), and bending durability (T80 = 20,000 tensiononly bending cycles). These synergistic virtuous effects are attributed to the LD MHP capping layer enhancing photocarriers extraction, providing protection against the environment, and "sealing" surface flaws on the 3D MHP thin film. The latter reduces the pro. pensity for cracking in bending, which results in improved environmental stability and bending durability.
引用
收藏
页码:1587 / 1601
页数:15
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