期刊
SOLAR RRL
卷 2, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201800216
关键词
CsPbI2Br; efficiency; inorganic; perovskite; solar cells; stabilized
资金
- National Key Research and Development Program of China MOST [2017YFA0204800]
- Fundamental Research Funds for the Central Universities [GK201703026/2018CSLZ012]
- National Natural Science Foundation of China [61704099/91733301]
- Natural Science Foundation of Shaanxi Province [2018JQ6072]
- 111 Project [B14041]
CsPbI2Br has been recognized as a promising material for photovoltaic applications due to its excellent optoelectronic properties and compositional stability. Unfortunately, its desired perovskite phase is not stable in humid environments as it is spontaneously transformed into a yellow non-perovskite phase. Herein, we present our strategy to use phenylethylammonium chlorine (PEACl) treatment to significantly improve the moisture-resistance of the CsPbI2Br film without compromising its high solar cell efficiency. It is found that: 1) small-sized hydrophobic aromatic group PEA(+) forms in the edge-on orientation on the CsPbI2Br surface and 2) smaller halide Cl- is doped into the CsPbI2Br lattice during post-annealing, leading to a smaller lattice structure with beneficial crystallization quality. Compared with the reference sample without the PEACl treatment, the present device achieves a comparable power-conversion efficiency of 14.05% and much improved moisture resistance.
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