How Lattice Dynamics Moderate the Electronic Properties of Metal-Halide Perovskites,The Journal of Physical Chemistry Letters

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How Lattice Dynamics Moderate the Electronic Properties of Metal-Halide Perovskites
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-11-13 00:00:00 , DOI: 10.1021/acs.jpclett.8b02811
Laura M. Herz ₁

Affiliation

Metal-halide perovskites have emerged as highly promising semiconductors with excellent optoelectronic properties. This Perspective outlines how the dynamic response of the ionic lattice affects key electronic properties such as exciton binding energies and charge-carrier mobilities in hybrid perovskites. Such links are shown to derive from the frequency-dependence of the dielectric function, which is governed by contributions from electronic interband transitions, polar vibrations of the metal-halide sublattice, organic cation collective reorientations, and ionic movement. The influence of each of these contributions to charge-carrier screening and carrier–lattice interactions is discussed, which allows for general trends with material composition to be revealed. Overall, this Perspective highlights the challenges and questions arising from the peculiar combination of a soft polar metal-halide sublattice interspersed with rotationally mobile dipolar molecules that is encountered in hybrid metal-halide perovskites.

中文翻译：

晶格动力学如何调节金属卤化物钙钛矿的电子性质

金属卤化物钙钛矿已经成为具有优良光电性能的极有前途的半导体。该观点概述了离子晶格的动态响应如何影响关键的电子性能，例如混合钙钛矿中的激子结合能和电荷载流子迁移率。所示链接是由介电函数的频率相关性得出的，介电函数的频率相关性受电子带间跃迁，金属卤化物亚晶格的极性振动，有机阳离子集体重新取向和离子运动的影响。讨论了这些贡献各自对电荷-载流子筛选和载流子-晶格相互作用的影响，从而揭示了材料组成的一般趋势。全面的，

更新日期：2018-11-13

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