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

We report observations of coherent phonon oscillations in solution-processed polycrystalline stibnite (Sb sub(2)S sub(3)) photovoltaic thin films using transient absorption spectroscopy. Detailed optical spectroscopy correlated by extensive first-principles lattice dynamics calculations indicates th...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-07, Vol.90 (3), Article 035208
Main Authors: Chong, Wee Kiang, Xing, Guichuan, Liu, Yun, Gui, Ee Ling, Zhang, Qing, Xiong, Qihua, Mathews, Nripan, Gan, Chee Kwan, Sum, Tze Chien
Format: Article
Language:English
Subjects:
Channels
Coherence
Condensed matter
Dynamics
Oscillations
Phonons
Stibnite
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report observations of coherent phonon oscillations in solution-processed polycrystalline stibnite (Sb sub(2)S sub(3)) photovoltaic thin films using transient absorption spectroscopy. Detailed optical spectroscopy correlated by extensive first-principles lattice dynamics calculations indicates that the coherent B sub(3)g longitudinal optical phonon mode with a frequency of 63.74 + or - 0.05 cm super(-1) (or 1.911 + or - 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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.90.035208