The interaction between electrons and phonons in CsPbBr₃ is essential for the design of CsPbBr₃ based optoelectronics since the phonon governs emission line broadening in metal halide perovskites. In this work, the temperature dependent photoluminescence linewidth was obtained from 80 K to 400 K. Density functional theory and many-body perturbation theory were used to calculate the electron–phonon coupling in CsPbBr₃. We demonstrate that the electron–phonon coupling is dominated by the longitudinal optical phonon. In addition, the photoluminescence spectrum broadening is almost linear with temperatures from 80 K to 400 K. Their results provide a better understanding of the mechanism of electron–phonon scattering in CsPbBr₃ and related optoelectronic devices.

中文翻译：

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CsPbBr3中的电子-声子耦合

CsPbBr _3中电子与声子之间的相互作用对于基于CsPbBr ₃的光电设计至关重要，因为声子控制着金属卤化物钙钛矿中的发射线变宽。在这项工作中，获得了温度依赖于80 K至400 K的光致发光线宽。使用密度泛函理论和多体摄动理论来计算CsPbBr _3中的电子-声子耦合。我们证明了电子-声子耦合由纵向光学声子主导。此外，在80 K至400 K的温度下，光致发光光谱的展宽几乎是线性的。他们的结果提供了对CsPbBr ₃中电子-声子散射机理的更好理解。 及相关的光电设备。