期刊
ADVANCED ENERGY MATERIALS
卷 11, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202003585
关键词
CsPbI Br-1 5(1.5); high performance; organic dyes; passivation; solar cells
类别
资金
- Research Grants Council of Hong Kong [G-CityU101/15]
The research fabricates highly efficient and stable CsPbI1.5Br1.5 compositional perovskite-based inorganic solar cells using an organic dye, FITC, as a passivator. The resulting device shows champion efficiency with negligible hysteresis, making it a promising candidate for high-performance inorganic solar cells. FITC can also be generally adopted as an attractive passivator for other types of inorganic perovskite solar cells.
All-inorganic perovskite solar cells (PSCs) have recently received growing attention as a promising template to solve the thermal instability of organic-inorganic PSCs. However, the thermodynamic phase instability and relatively low device efficiency pose challenges. Herein, highly efficient and stable CsPbI1.5Br1.5 compositional perovskite-based inorganic PSCs are fabricated using an organic dye, fluorescein isothiocyanate (FITC), as a passivator. The carboxyl and thiocyanate groups of FITC not only minimize the trap states by forming interactions with the under-coordinated Pb2+ ions but also significantly increase the grain size and improve the crystallinity of the perovskite films during annealing. Consequently, perovskite films with superior optoelectronic properties, prolonged carrier lifetime, reduced trap density, and improved stability are obtained. The resulting device yields a champion efficiency of 14.05% with negligible hysteresis, which presents the highest reported efficiency for inorganic CsPbI1.5Br1.5 solar cells reported thus far. In addition, FITC can be generally adopted as attractive passivator to improve the performance of CsPbI2Br- and CsPbIBr2-based PSCs. Furthermore, with a comprehensive comparison of mixed-halide inorganic perovskites, it is demonstrated that CsPbI1.5Br1.5 compositional perovskite is a promising candidate with the optimal halide composition for high-performance inorganic PSCs.
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