Photovoltaic Hybrid Perovskites under Pressure.
Photovoltaic Hybrid Perovskites under Pressure.
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DOI：
10.1021/acs.jpclett.7b00520
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
M. Szafrański;A. Katrusiak
中科院分区：
文献类型：
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作者：
M. Szafrański;A. Katrusiak
高压下对通式[CH3NH3]+PbX3-（简称MAPbX3，其中X = Cl, Br， I）的三卤铅酸甲铵及其类似物的研究，为太阳能收集材料的研究提供了新的思路，为光伏科学技术开辟了新的前景。然而，在已报道的结构、量热和光谱学结果之间，甚至在采用相同技术（例如x射线衍射）获得的结果之间，也存在相当大的差异。这些差异的来源和可能的陷阱在MAPbX3晶体的衍射和光谱研究进行了调查。本研究中发现的几个新效应涉及异常慢动力学的相变和相的共存。它们强烈影响光伏特性，对理论、预测和技术应用至关重要。
High-pressure studies on methylammonium trihaloplumbates, of general formula [CH3NH3]+PbX3- (abbreviated MAPbX3, where X = Cl, Br, I), and its analogues shed new light on the materials for harvesting solar energy and open new perspectives for photovoltaic science and technology. However, there are considerable discrepancies between the reported structural, calorimetric, and spectroscopic results and even between the results obtained by the same technique, for example, of X-ray diffraction. The origins of these discrepancies and possible pitfalls in the diffraction and spectroscopic studies on MAPbX3 crystals have been investigated. Several new effects revealed in this study involve phase transitions of exceptionally slow kinetics and the coexistence of phases. They strongly affect photovoltaic properties and are essential for theory, predictions, and technological applications.