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Solvent-controlled growth of inorganic perovskite films in dry environment for efficient and stable solar cells.

ABSTRACT: Inorganic halide perovskites such as cesium lead halide are promising due to their excellent thermal stability. Cesium lead iodide (CsPbI₃) has a bandgap of 1.73?eV and is very suitable for making efficient tandem solar cells, either with low-bandgap perovskite or silicon. However, the phase instability of CsPbI₃ is hindering the further optimization of device performance. Here, we show that high quality and stable ?-phase CsPbI₃ film is obtained via solvent-controlled growth of the precursor film in a dry environment. A 15.7% power conversion efficiency of CsPbI₃ solar cells is achieved, which is the highest efficiency reported for inorganic perovskite solar cells up to now. And more importantly, the devices can tolerate continuous light soaking for more than 500?h without efficiency drop.

SUBMITTER: Wang P

PROVIDER: S-EPMC5993712 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Solvent-controlled growth of inorganic perovskite films in dry environment for efficient and stable solar cells.

Wang Pengyang P Zhang Xingwang X Zhou Yuqin Y Jiang Qi Q Ye Qiufeng Q Chu Zema Z Li Xingxing X Yang Xiaolei X Yin Zhigang Z You Jingbi J

Nature communications 20180608 1

Inorganic halide perovskites such as cesium lead halide are promising due to their excellent thermal stability. Cesium lead iodide (CsPbI3) has a bandgap of 1.73 eV and is very suitable for making efficient tandem solar cells, either with low-bandgap perovskite or silicon. However, the phase instability of CsPbI3 is hindering the further optimization of device performance. Here, we show that high quality and stable α-phase CsPbI3 film is obtained via solvent-cont ...[more]

PMID: 29884815

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