论文标题
CSPBBR3的角度分辨光发射中是否有二行子签名？
Is there a polaron signature in angle-resolved photoemission of CsPbBr3?
论文作者
论文摘要
已经提出了大极层的形成是高缺陷耐受性，低迁移率，低电荷载体诱捕和低促卤化物钙钛矿的非递增性重组率的原因。最近，已经据报道，与正交结构的理论相比，CSPBBR3的角度分辨光发射中有效的50％有效质量增强了大量过时形成的直接证据。我们介绍了CSPBBR3和GW计算的深入带分散测量值，这些测量在实验中导致价值最大为0.203 +/- 0.016 m0的有效质量，而正骨理论中的有效质量为0.226 M0。我们认为，有效质量可以仅根据电子电子相关性来解释，而从光发射数据中不能得出结论。
The formation of large polarons has been proposed as reason for the high defect tolerance, low mobility, low charge carrier trapping and low nonradiative recombination rates of lead halide perovskites. Recently, direct evidence for large-polaron formation has been reported from a 50% effective mass enhancement in angle-resolved photoemission of CsPbBr3 over theory for the orthorhombic structure. We present in-depth band dispersion measurements of CsPbBr3 and GW calculations which lead to almost identical effective masses at the valence band maximum of 0.203+/-0.016 m0 in experiment and 0.226 m0 in orthorhombic theory. We argue that the effective mass can be explained solely on the basis of electron-electron correlation and large-polaron formation cannot be concluded from photoemission data.
