Thermal degradation of CH3NH3PbI3 perovskite into NH3 and CH3I gases observed by coupled thermogravimetry-mass spectrometry analysis
Thermal degradation of CH3NH3PbI3 perovskite into NH3 and CH3I gases observed by coupled thermogravimetry-mass spectrometry analysis
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DOI：
10.1039/c6ee02016j
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发表时间：
2016-01-01
影响因子：
32.5
通讯作者：
Qi, Yabing
中科院分区：
文献类型：
--
作者：
Juarez-Perez, Emilio J.;Hawash, Zafer;Qi, Yabing
采用热重-差热分析（TG-DTA）、四极杆质谱（MS）和第一性原理计算等方法研究了CH 3 NH3 PbI 3热分解过程中释放气体的化学性质。与CH 3 NH3 PbI 3分解成CH 3 NH 2和HI的常识相反，主要气体是碘甲烷（CH 3 I）和氨（NH3）。我们预计，我们的研究结果将为钙钛矿活性材料的进一步配方和器件设计提供新的见解，可以防止甲基铵分解，从而提高基于钙钛矿的光电器件的长期稳定性。
Thermal gravimetric and differential thermal analysis (TG-DTA) coupled with quadrupole mass spectrometry (MS) and first principles calculations were employed to elucidate the chemical nature of released gases during the thermal decomposition of CH3NH3PbI3. In contrast to the common wisdom that CH3NH3PbI3 is decomposed into CH3NH2 and HI, the major gases were methyliodide (CH3I) and ammonia (NH3). We anticipate that our findings will provide new insights into further formulations of the perovskite active material and device design that can prevent methylammonium decomposition and thus increase the long-term stability of perovskite-based opto-electronic devices.