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Effects of methylamine doping on the stability of triple cation (FA0.95−xMAxCs0.05)PbI3 single crystal perovskites

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Abstract

Despite being promising photovoltaic materials, widespread use of organic–inorganic halide perovskite materials is still hindered by their undesirable stability. To cope with this challenge, methylamine (MA) is doped into triple cation perovskite single crystals of (FA0.95−xMAxCs0.05)PbI3, and cesium-containing triple cation perovskite single crystals with five different MA molar ratios (x = 0, 0.05, 0.10, 0.15, and 0.20) are synthesized and characterized. Among them, (FA0.8MA0.15Cs0.05)PbI3 shows high stability against water-oxygen and light for 60 days, and the thermal decomposition temperature of (FA0.8MA0.15Cs0.05)PbI3 reaches as high as 305 °C. Besides, the carrier lifetime of (FA0.8MA0.15Cs0.05)PbI3 is up to 5.957 μs, which remains as 5.646 μs (95%) after 60 days of light illumination. This work studies the stability of perovskite single crystals based on (FA0.95−xMAxCs0.05)PbI3 compositions and provides a reference for the discovery of novel perovskite photovoltaic devices with high efficiency and long-term stability.

Graphical abstract: Effects of methylamine doping on the stability of triple cation (FA0.95−xMAxCs0.05)PbI3 single crystal perovskites

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Publication details

The article was received on 28 Oct 2019, accepted on 13 Nov 2019 and first published on 15 Nov 2019


Article type: Paper
DOI: 10.1039/C9NA00682F
Nanoscale Adv., 2020, Advance Article
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    Effects of methylamine doping on the stability of triple cation (FA0.95−xMAxCs0.05)PbI3 single crystal perovskites

    Y. Huang, L. Zhao, J. Li, F. Lu and S. Wang, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/C9NA00682F

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