Direct measurement of coherent phonon dynamics in solution-processed stibnite thin films

We report observations of coherent phonon oscillations in solution-processed polycrystalline stibnite (Sb2S3) photovoltaic thin films using transient absorption spectroscopy. Detailed optical spectroscopy correlated by extensive first-principles lattice dynamics calculations indicates that the coher...

全面介紹

Saved in:
書目詳細資料
Main Authors: Mathews, Nripan, Gan, Chee Kwan, Chong, Wee Kiang, Xing, Guichuan, Liu, Yun, Gui, Ee Ling, Zhang, Qing, Xiong, Qihua, Sum, Tze Chien
其他作者: School of Electrical and Electronic Engineering
格式: Article
語言:English
出版: 2014
主題:
在線閱讀:https://hdl.handle.net/10356/104898
http://hdl.handle.net/10220/20395
標簽: 添加標簽
沒有標簽, 成為第一個標記此記錄!
實物特徵
總結:We report observations of coherent phonon oscillations in solution-processed polycrystalline stibnite (Sb2S3) photovoltaic thin films using transient absorption spectroscopy. Detailed optical spectroscopy correlated by extensive first-principles lattice dynamics calculations indicates that the coherent B3g longitudinal optical phonon mode with a frequency of 63.74 ± 0.05 cm−1 (or 1.911 ± 0.002 THz) at room temperature is generated via the impulsive stimulated-Raman-scattering mechanism. These strong electron-phonon interactions indicate a dominant energy-loss channel in these materials that could impose a fundamental limit on their solar energy conversion efficiency.