AI Article Synopsis
- Researchers studied CZTSe films using polarization-dependent Raman spectroscopy and identified key peaks at 170 cm(-1) and 195 cm(-1) that exhibit A symmetry.
- The peak at 170 cm(-1) breaks down into two modes at 168 cm(-1) and 172 cm(-1), linked to A symmetry modes predicted for the kesterite structure of Cu(2)ZnSnSe(4).
- The main Raman peak shows asymmetric broadening towards lower energies, which is connected to phonon confinement effects due to lattice defects, as explored through varying temperature and depth measurements.
Article Abstract
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.
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| http://dx.doi.org/10.1364/OE.21.00A695 | DOI Listing |
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