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Effects of methylamine doping on the stability of triple cation (FA0.95-x MA x Cs0.05)PbI3 single crystal perovskites.

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-x MA x Cs0.05)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-x MA x Cs0.05)PbI3 compositions and provides a reference for the discovery of novel perovskite photovoltaic devices with high efficiency and long-term stability.

SUBMITTER: Huang Y 

PROVIDER: S-EPMC9417697 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature

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Effects of methylamine doping on the stability of triple cation (FA<sub>0.95-<i>x</i></sub> MA <sub><i>x</i></sub> Cs<sub>0.05</sub>)PbI<sub>3</sub> single crystal perovskites.

Huang Yimin Y   Zhao Li L   Li Jin J   Lu Fang F   Wang Shimin S  

Nanoscale advances 20191115 1

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 (FA<sub>0.95-<i>x</i></sub> MA <sub><i>x</i></sub> Cs<sub>0.05</sub>)PbI<sub>3</sub>, and cesium-containing triple cation perovskite single crystals with five different MA molar ratios (<i>x</i> = 0, 0.05, 0.10, 0.15, and 0.20) are sy  ...[more]

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