Raman scattering and disorder effect in Cu2ZnSnS4 (pages 258–261)
M. Y. Valakh, O. F. Kolomys, S. S. Ponomaryov, V. O. Yukhymchuk, I. S. Babichuk, V. Izquierdo-Roca, E. Saucedo, A. Perez-Rodriguez, J. R. Morante, S. Schorr and I. V. Bodnar
Article first published online: 12 MAR 2013 | DOI: 10.1002/pssr.201307073
One of the most important challenges for the CZTS-type materials used for solar cells is nonstoichiometry. In this Letter, we investigate the relationship of antisite defects in the cation sublattice of CZTS with the peculiarities of its Raman spectra. The change of CZTS crystal symmetry from kesterite-type I4 to a disordered kesterite-type manifests itself in a change of frequency and bandwidth of the main Raman A peak. This fact is discussed in the connection with disorder of Cu+ and Zn2+-ions on 2c and 2d sites in the crystalline lattice.