Journal
NANOSCALE RESEARCH LETTERS
Volume 15, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-020-03313-0
Keywords
Mixed cations; Morphology control; Lead halide perovskite; Perovskite solar cells
Funding
- National Natural Science Foundation of China [61575019]
- Fundamental Research Funds for the Central Universities [2017RC015, 2017RC034, 2017JBZ105]
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The utilization of mixed cations is beneficial for taking the advantages of cations and achieving highly efficient perovskite solar cells (PSCs). Herein, the precisely small incorporation of CH(NH2)(2) (FA) cations in methyl ammonium lead iodide (MAPbI(3)) enables the formation of compact, smooth perovskite film with high crystallinity. Consequently, the short-circuit current and the fill factor of the PSCs based on FA(x)MA(1-x)PbI(3) perovskite are greatly improved, leading to the enhanced device efficiency. The champion PSC based on FA(0.1)MA(0.9)PbI(3) exhibits a remarkably high efficiency of 22.02%. Furthermore, the PSCs based on FA(0.1)MA(0.9)PbI(3) perovskite also show improved device stability. This work provides a simple approach to fabricate high-quality perovskite films and high-performance PSCs with better stability.
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