Achieving over 18 % Efficiency Organic Solar Cell Enabled by a ZnO-Based Hybrid Electron Transport Layer with an Operational Lifetime up to 5 Years
By:
Li, ST (Li, Shitong) [1] , [2] ;
Fu, Q (Fu, Qiang) [1] , [2] ;
Meng, LX (Meng, Lingxian) [1] , [2] ;
Wan, XJ (Wan, Xiangjian) [1] , [2] ;
Ding, LM (Ding, Liming) [3] ;
Lu, GY (Lu, Guanyu) [4] ;
Lu, GH (Lu, Guanghao) [4] ;
Yao, ZY (Yao, Zhaoyang) [1] , [2] ;
Li, CX (Li, Chenxi) [1] , [2] ;
Chen, YS (Chen, Yongsheng) [1] , [2]
DOI
10.1002/anie.202207397
Abstract
Although organic solar cells (OSCs) have delivered an impressive power conversion efficiency (PCE) of over 19 %, most of them demonstrated rather limited stability. So far, there are hardly any effective and universal strategies to improve stability of state-of-the-art OSCs. Herein, we developed a hybrid electron-transport layer (ETL) in inverted OSCs using ZnO and a new modifying agent (NMA), and significantly improved the stability and PCEs for all the tested devices. In particular, when applied in the D18 : N3 system, its inverted OSC exhibits so far the highest PCE (18.20 %) among inverted single-junction OSCs, demonstrating an extrapolated T-80 lifetime of 7572 h (equivalent to 5 years under outdoor exposure). This is the first report with T-80 over 5000 h among OSCs with over 18 % PCE. Furthermore, a high PCE of 16.12 % can be realized even in a large-area device (1 cm(2)). This hybrid ETL strategy provides a strong stimulus for highly prospective commercialization of OSCs.
