Journal article

Publication year: 2020

Journal: Advanced Functional Materials

Volume number: 30

Issue number: 24

ISSN: 1616-301X

eISSN: 1616-3028

DOI Link: https://doi.org/10.1002/adfm.202002230

Publisher: Wiley

Abstract: 
As the most promising lead-free branch, tin halide perovskites suffer from the severe oxidation from Sn2+ to Sn4+, which results in the unsatisfactory conversion efficiency far from what they deserve. In this work, by facile incorporation of methylammonium bromide in composition engineering, formamidinium and methylammonium mixed cations tin halide perovskite films with ultrahighly oriented crystallization are synthesized with the preferential facet of (001), and that oxidation is suppressed with obviously declined trap density. MA(+) ions are responsible for that impressive orientation while Br- ions account for their bandgap modulation. Depending on high quality of the optimal MA(0.25)FA(0.75)SnI(2.75)Br(0.25) perovskite films, their device conversion efficiency surges to 9.31% in contrast to 5.02% of the control formamidinium tin triiodide perovskite (FASnI(3)) device, along with almost eliminated hysteresis. That also results in the outstanding device stability, maintaining above 80% of the initial efficiency after 300 h of light soaking while the control FASnI(3) device fails within 120 h. This paper definitely paves a facile and effective way to develop high-efficiency tin halide perovskites solar cells, optoelectronic devices, and beyond.

Harvard Citation style: Yu Bin-Bin, Liao Min, Zhu Yudong, Zhang Xusheng, Du Zheng, Jin Zhixin, et al. (2020) Oriented Crystallization of Mixed-Cation Tin Halides for Highly Efficient and Stable Lead-Free Perovskite Solar Cells, Advanced Functional Materials, 30(24), Article 2002230. https://doi.org/10.1002/adfm.202002230

APA Citation style: Yu Bin-Bin, Liao Min, Zhu Yudong, Zhang Xusheng, Du Zheng, Jin Zhixin, Liu Di, Wang Yiyu, Gatti, T., Ageev, O., & He Zhubing (2020). Oriented Crystallization of Mixed-Cation Tin Halides for Highly Efficient and Stable Lead-Free Perovskite Solar Cells. Advanced Functional Materials. 30(24), Article 2002230. https://doi.org/10.1002/adfm.202002230