Extending the Charge Carrier Recombination Lifetime by Octahedral Rotations in Ruddlesden-Popper BaZrS Perovskites.

Intentional distortions of [BX] octahedra within perovskite structures have been recognized as a potent strategy for precise band gap adjustments and optimization of their photovoltaic properties, yet information regarding charge carrier dynamics linked to octahedral distortion under ambient conditions for chalcogenide perovskites remains limited. In this study, we utilize nonadiabatic molecular dynamics to explore the dynamics of photogenerated carriers in a representative two-dimensional BaZrS material in the Ruddlesden-Popper phase. The theoretical results highlight the influence of octahedral rotation on the materials' stability and carrier recombination lifetime of the system.

[Discussion on the date of Dunhuang medical scrolls].

The latest closing time of the Dunhuang cave for preserving Buddhist sutra should be considered firstly in the textual research on the date of Dunhuang medical scrolls. Based on the word "Shanyao" recorded in the scroll P. 3810, it is very likely that this scroll was copied after the reign of Emperor Yingzong of the Song Dynasty, and the sealing time of Dunhuang cave for preserving Buddhist sutra was, most probably, later than 1064.

[The supplementary collation and emendation of Dunhuang medical scroll P. 2882V].

Dunhuang medical scroll P. 2882V is defected and illegible due to its long and old history. There are many versions of Dunhuang medical scroll, Compiled Emendation of Dunhuang Medical Literature arranged by Ma Jixing being one of them.