The three A symmetry Raman modes of kesterite in Cu_2ZnSnSe_4
Copyright policy )The three A symmetry Raman modes of kesterite in Cu_2ZnSnSe_4
We investigate CZTSe films by polarization dependent Raman spectroscopy. The main peaks at 170 cm(-1), and 195 cm(-1) are found to have A symmetry. The Raman signal at 170 cm(-1) is found to be composed of two modes at 168 cm(-1) and 172 cm(-1). We attribute these three Raman peaks to the three A symmetry modes predicted for kesterite ordered Cu(2)ZnSnSe(4). The main Raman peak is asymmetrically broadened towards lower energies. Possible sources of the broadening are tested through temperature and depth dependent measurements. The broadening is attributed to phonon confinement effects related to the presence of lattice defects.
- Institut de Recerca de l'Energia de Catalunya Spain
- University of Luxembourg Luxembourg
- Adria Airways Slovenia
Physical, chemical, mathematical & earth Sciences, Physique, Physics, Physique, chimie, mathématiques & sciences de la terre
Physical, chemical, mathematical & earth Sciences, Physique, Physics, Physique, chimie, mathématiques & sciences de la terre
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