期刊
JOURNAL OF POWER SOURCES
卷 564, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2023.232874
关键词
Perovskite solar cells; Additive engineering; 1-Ethyl-3-methylimidazolium chloride (EMIC); ionic liquid; Defect passivation; Moisture; thermal stability
A novel ionic liquid (IL) additive, 1-ethyl-3-methylimidazolium chloride (EMIC), has been found to improve the stability of perovskite solar cells (PSCs) by enhancing crystallinity, surface topography, carrier lifetimes, defect density reduction, and interfacial band energy alignment. The EMIC-based PSC achieves a PCE of 20.15% and retains 89% of its initial PCE after 1440 hours of ambient storage (30% RH, 25 degrees C), and retains 65% of its initial PCE after 600 hours of thermal aging (85 degrees C, 10% RH).
Despite the meteoric rise of perovskite solar cell (PSC) efficiency in recent years, commercialization of this technology is still limited by issues pertaining to perovskite instability. Herein, a novel ionic liquid (IL) - 1-ethyl-3-methylimidazolium chloride (EMIC) additive is shown to be beneficial in enhancing perovskite's ambient and operational stability. Not only does it improve crystallinity and smoothen surface topography, but the simul-taneous increase in carrier lifetimes, reduction in defect density as well as improvement to interfacial band energy alignment have contributed extensively towards promoting higher power conversion efficiency (PCE) and moisture/thermal stability of the EMIC-based PCSs. The champion, unencapsulated EMIC-based PSC yields a PCE of 20.15% and retains 89% of its initial PCE after 1440 h of storage under ambient conditions (30% Relative humidity (RH), 25 degrees C) and retains 65% of its initial PCE after 600 h of thermal aging (85 degrees C, 10% RH).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据