화학공학소재연구정보센터
Solar Energy, Vol.103, 89-95, 2014
Combined Raman scattering/photoluminescence analysis of Cu(In,Ga)Se-2 electrodeposited layers
This work reports the optical non-destructive assessment of the relative Ga content in Cu(In,Ga)Se-2 absorbers synthesized from electrodeposited precursors using combined photoluminescence (PL) and Raman scattering. Comparison of the PL measurements with the Auger Spectroscopy characterization of the layers has allowed performing a calibration of the dependence of the PL peak energy on the absorber composition. This opens the possibility for the nondestructive chemical assessment of the absorbers synthesized with these low cost processes. Extension of these measurements using a confocal microscope demonstrates their viability for the nondestructive quantitative chemical profiling of the layers. Correlation of these data with Raman spectra measured with the same experimental setup allows deepening in the interpretation of the spectra, giving additional information related to the microcrystalline quality of the layers and the presence of secondary phases. (C) 2014 Elsevier Ltd. All rights reserved.