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Photon recycling in perovskite CH3NH3PbX3 (X = I, Br, Cl) bulk single crystals and polycrystalline films
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.jlumin.2019.116987
Takumi Yamada , Yasuhiro Yamada , Yoshihiko Kanemitsu

Abstract Lead halide perovskite semiconductors are promising materials for optical devices due to their excellent optoelectronic properties. In addition to large light absorption coefficients, which originate from a direct band gap structure, they exhibit almost no Stokes shift between absorption edge and photoluminescence (PL) peak. Therefore, the effect of PL reabsorption plays an important role for their emission spectra in bulk crystals. In this review, we analyze the PL dynamics in CH3NH3PbX3 (X = I, Br, Cl) single crystals to provide a clear picture of the dynamical effects of PL reabsorption that occur in perovskites. This knowledge is essential for accurate characterization via PL and photon management for optical devices. We also show that the grain size dependence of PL spectra obtained from polycrystalline thin films can be interpreted by PL reabsorption.

中文翻译:

钙钛矿 CH3NH3PbX3 (X = I, Br, Cl) 块状单晶和多晶薄膜中的光子回收

摘要 卤化铅钙钛矿半导体由于其优异的光电性能而成为有前途的光学器件材料。除了源自直接带隙结构的大光吸收系数外,它们在吸收边和光致发光 (PL) 峰之间几乎没有斯托克斯位移。因此,PL 重吸收的影响对它们在块状晶体中的发射光谱起着重要作用。在这篇综述中,我们分析了 CH3NH3PbX3 (X = I, Br, Cl) 单晶中的 PL 动力学,以提供钙钛矿中发生的 PL 重吸收动力学效应的清晰图片。这些知识对于通过光学器件的 PL 和光子管理进行准确表征至关重要。
更新日期:2020-04-01
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