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Title: Direct measurement of coherent phonon dynamics in solution-processed stibnite thin films
Authors: Mathews, Nripan
Gan, Chee Kwan
Chong, Wee Kiang
Xing, Guichuan
Liu, Yun
Gui, Ee Ling
Zhang, Qing
Xiong, Qihua
Sum, Tze Chien
Keywords: DRNTU::Science::Physics
Issue Date: 2014
Source: Chong, W. K., Xing, G., Liu, Y., Gui, E. L., Zhang, Q., Xiong, Q., et al. (2014). Direct measurement of coherent phonon dynamics in solution-processed stibnite thin films. Physical Review B, 90(3), 035208-.
Series/Report no.: Physical review B
Abstract: 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.
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.90.035208
Rights: © 2014 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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