甲脒
钙钛矿(结构)
卤化物
分子内力
化学物理
共振(粒子物理)
材料科学
旋转-振动耦合
超短脉冲
光电子学
光伏
光化学
化学
分子
结晶学
原子物理学
光学
激光器
物理
无机化学
光伏系统
生态学
有机化学
立体化学
生物
作者
Nathaniel P. Gallop,Dmitry R. Maslennikov,Navendu Mondal,Katelyn P. Goetz,Zhenbang Dai,Aaron M. Schankler,Woongmo Sung,Satoshi Nihonyanagi,Tahei Tahara,Maryna I. Bodnarchuk,Maksym V. Kovalenko,Yana Vaynzof,Andrew M. Rappe,Artem A. Bakulin
标识
DOI:10.1038/s41563-023-01723-w
摘要
Abstract Vibrational control (VC) of photochemistry through the optical stimulation of structural dynamics is a nascent concept only recently demonstrated for model molecules in solution. Extending VC to state-of-the-art materials may lead to new applications and improved performance for optoelectronic devices. Metal halide perovskites are promising targets for VC due to their mechanical softness and the rich array of vibrational motions of both their inorganic and organic sublattices. Here, we demonstrate the ultrafast VC of FAPbBr 3 perovskite solar cells via intramolecular vibrations of the formamidinium cation using spectroscopic techniques based on vibrationally promoted electronic resonance. The observed short (~300 fs) time window of VC highlights the fast dynamics of coupling between the cation and inorganic sublattice. First-principles modelling reveals that this coupling is mediated by hydrogen bonds that modulate both lead halide lattice and electronic states. Cation dynamics modulating this coupling may suppress non-radiative recombination in perovskites, leading to photovoltaics with reduced voltage losses.
科研通智能强力驱动
Strongly Powered by AbleSci AI