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Title:	Multiwavelength excitation Raman scattering study of polycrystalline kesterite Cu2ZnSnS4 thin films
Author:	Dimitrievska, Mirjana; Fairbrother, Andrew; Fontané, X.; Jawhari, Tariq; Izquierdo Roca, Victor; Saucedo, Edgardo; Pérez Rodríguez, Alejandro
Other authors:	Universitat de Barcelona
Abstract:	This work presents a complete analysis of all Raman active modes of Cu 2ZnSnS4 measuring with six different excitation wavelengths from near infrared to ultraviolet. Simultaneous fitting of spectra allowed identification of 18 peaks from device grade layers with composition close to stoichiometry that are attributed to the 27 optical modes theoretically expected for this crystalline structure, including detection of 5 peaks not observed previously, but theoretically predicted. Resonance effects are assumed to explain the observed increase in intensity of weak modes for near infrared and ultraviolet excitations. These results are particularly relevant for experimental discrimination of Raman modes related to secondary phases.
Subject(s):	-Espectroscòpia Raman -Coure -Termodinàmica -Semiconductors -Raman spectroscopy -Copper -Thermodynamics -Semiconductors
Rights:	(c) American Institute of Physics , 2014
Document type:	Article Article - Published version
Published by:	American Institute of Physics
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