Huang Yimin, Zhao Li, Li Jin, Lu Fang, Wang Shimin
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Wuhan 430062 PR China
Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University Wuhan 430062 PR China.
Nanoscale Adv. 2019 Nov 15;2(1):332-339. doi: 10.1039/c9na00682f. eCollection 2020 Jan 22.
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 MA Cs)PbI, and cesium-containing triple cation perovskite single crystals with five different MA molar ratios ( = 0, 0.05, 0.10, 0.15, and 0.20) are synthesized and characterized. Among them, (FAMACs)PbI shows high stability against water-oxygen and light for 60 days, and the thermal decomposition temperature of (FAMACs)PbI reaches as high as 305 °C. Besides, the carrier lifetime of (FAMACs)PbI 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 (FA MA Cs)PbI compositions and provides a reference for the discovery of novel perovskite photovoltaic devices with high efficiency and long-term stability.
尽管有机-无机卤化物钙钛矿材料是很有前景的光伏材料，但其不理想的稳定性仍然阻碍了它们的广泛应用。为应对这一挑战，将甲胺（MA）掺杂到（FA MA Cs）PbI的三阳离子钙钛矿单晶中，合成并表征了五种不同MA摩尔比（ = 0、0.05、0.10、0.15和0.20）的含铯三阳离子钙钛矿单晶。其中，（FAMACs）PbI在60天内对水氧和光表现出高稳定性，（FAMACs）PbI的热分解温度高达305°C。此外，（FAMACs）PbI的载流子寿命高达5.957 μs，光照60天后仍保持5.646 μs（95%）。这项工作研究了基于（FA MA Cs）PbI组成的钙钛矿单晶的稳定性，并为发现具有高效率和长期稳定性的新型钙钛矿光伏器件提供了参考。
