钙钛矿(结构)
材料科学
原子层沉积
无定形固体
电极
图层(电子)
化学工程
降级(电信)
沉积(地质)
扩散
金属
纳米技术
离子
扩散阻挡层
能量转换效率
光电子学
化学
冶金
有机化学
电气工程
沉积物
生物
古生物学
物理化学
工程类
物理
热力学
作者
Seongrok Seo,Sooeun Shin,Eun-Soo Kim,Seonghwa Jeong,Nam‐Gyu Park,Hyunjung Shin
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-08-27
卷期号:6 (9): 3332-3341
被引量:30
标识
DOI:10.1021/acsenergylett.1c01446
摘要
Significant progress has been achieved in improving the power conversion efficiency (PCE) of perovskite solar cells (PSCs) for a decade, but the long-term stability is still underdeveloped. In a regular PSC structure, 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)9,9′-spirobifluorene (Spiro-OMeTAD) with Li additives and metal electrodes are widely adopted, which leads to facile degradation under device operating conditions because of ion migration. Herein, we show an interface-engineered stabilization approach to prevent ion migration in PSCs enabled by amorphous (a)-TiO2 capable of hole transfer grown by atomic layer deposition (ALD). This layer prevents ion migration of Li additives with consequent aggregation as well as metal electrode diffusion into the perovskite layer. Furthermore, the combined layers of Spiro-OMeTAD/a-TiO2 unprecedentedly promote device efficiency, which is further verified with other organic hole transport layers. Finally, the operational stability of the TiO2-PSC is substantially improved in comparison to that of the control PSC.
科研通智能强力驱动
Strongly Powered by AbleSci AI