钝化
结晶
钙钛矿(结构)
材料科学
能量转换效率
光伏系统
化学工程
溶剂
光电子学
过氧化氢
化学
纳米技术
有机化学
图层(电子)
工程类
生物
生态学
作者
Tingting Zhong,Lei Shi,Huiying Hao,Jianguo Dong,Kunpeng Tang,Xu Xiang,Shindume Lomboleni Hamukwaya,Hao Liu,Jie Xing
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2021-09-16
卷期号:9 (38): 13010-13020
被引量:9
标识
DOI:10.1021/acssuschemeng.1c04542
摘要
In order to further promote the commercial application of perovskite solar cells (PSCs), it is particularly important to fabricate devices in the ambient air condition. Herein, we explore a simple method to reproduce high-efficiency and stable PSCs using the one-step anti-solvent deposition conducted in the full ambient air. NH4Ac (ammonium acetate), which is green and environmentally friendly, is first introduced into an anti-solvent (ethyl acetate) to enhance the photovoltaic performance and stability of devices. NH4+ causes the intermediate phase to undergo a process of cation exchange, thereby delaying crystallization. Ac– makes the additive and A-site cation form hydrogen bonds, which in turn makes the intermediate phase more stable. The dual effects of NH4+ and Ac– delay the crystallization of the perovskite film, reduce the density of defect states, and decrease the non-radiative recombination of carriers. By optimizing the concentration of NH4Ac, a champion power conversion efficiency (PCE) of 20.41% and an average PCE of 19.46 ± 0.64% are achieved, which is currently one of the highest efficiencies in fabricating PSCs under the full ambient air condition. Furthermore, the corresponding PSCs without encapsulation can maintain 82% of its initial PCE when stored in full ambient air condition (30–40% RH) for 30 days.
科研通智能强力驱动
Strongly Powered by AbleSci AI