碘化物
甲脒
热重分析
溴化物
傅里叶变换红外光谱
卤化物
化学
蒸汽压
分析化学(期刊)
大气温度范围
无机化学
钙钛矿(结构)
化学工程
有机化学
热力学
工程类
物理
作者
Alexander J. Harding,Kevin D. Dobson,Babatunde A. Ogunnaike,William N. Shafarman
标识
DOI:10.1002/pssa.202100246
摘要
Four organic halide salts of interest to alloyed perovskite solar cell fabrication are characterized using attenuated total reflectance Fourier transform infrared spectroscopy (ATR‐FTIR), powder X‐ray diffraction (XRD), and thermogravimetric analysis. The chemical and crystal structures of methylammonium iodide (MAI), methylammonium bromide (MABr), and formamidinium iodide (FAI) are confirmed, and the experimental ATR‐FTIR spectrum and XRD pattern of formamidinium bromide (FABr) are presented. The enthalpy, Δ H vap , and entropy, Δ S vap , of vaporization are quantified for each salt and are used to estimate their vapor pressures in the temperature range of 150–300 °C. MAI, MABr, and FAI have similar vapor pressures in this temperature range, whereas FABr has a higher vapor pressure in the temperature range of 150–240 °C. These data provide a foundation for achieving effective control of vapor phase concentrations for vapor processing of alloyed perovskite solar cells.
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