Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3587614
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- Spanish Ministry of Science and Innovation [ENE2010-21541-C01-01]
- FNR [07/06]
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This work reports the in-depth resolved Raman scattering analysis with different excitation wavelengths of Cu2ZnSnS4 layers. Secondary phases constitute a central problem in this material, particularly since they cannot be distinguished by x-ray diffraction. Raman spectra measured with 325 nm excitation light after sputtering the layers to different depths show peaks that are not detectable by excitation in the visible. These are identified with Cu3SnS4 modes at the surface region while spectra measured close to the back region show peaks from ZnS and MoS2. Observation of ZnS is enhanced by resonant excitation conditions achieved when working with UV excitation. (C) 2011 American Institute of Physics. [doi:10.1063/1.3587614]
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