| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
 178 0 |
 SM ISO690:2012LEVCENKO, Sergiu, DUMCHENKO, Dumitru, HUANG, Ying-Sheng, TIONG, Kwong-Kaw, DU, Chaohung. Anisotropy of the spectroscopy properties of the wurtz-stannite Cu 2ZnGeS4 single crystals. In: Optical Materials, 2011, vol. 34, pp. 183-188. ISSN 0925-3467. DOI: https://doi.org/10.1016/j.optmat.2011.08.005 |
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  Optical Materials |
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| Volumul 34 / 2011 / ISSN 0925-3467 | ||||||
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| DOI:https://doi.org/10.1016/j.optmat.2011.08.005 | ||||||
| Pag. 183-188 | ||||||
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| Rezumat | ||||||
In this study, the near band edge anisotropic optical properties of wurtz-stannite (WS) Cu2ZnGeS4 single crystals were characterized using polarization-dependent transmittance and electrolyte electroreflectance (EER) techniques. Single crystals of Cu2ZnGeS 4 were grown by chemical vapor transport method using iodine as a transport agent. Analysis of absorption spectra revealed indirect allowed transitions for Cu2ZnGeS4 with the band gaps of 2.02 (2.07) and 2.08 (2.14) eV for Eb and a polarization configurations at 300 (10) K. The room-temperature EER spectra in the vicinity of the direct band edge showed anisotropic transitions at around 2.38, 2.44 and 2.45 eV for Eb, a and c polarizations, respectively. Based on the experimental observations and recent band-structure calculations a plausible band diagram near band edge of WS-Cu2ZnGeS4 was constructed. |
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| Cuvinte-cheie Crystal growth, optical properties, optical spectroscopy, Semiconductors |
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