Temperature dependence of the Urbach energy in ordered defect compounds Cu-III3-VI5 and Cu-III5-VI8 |
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| Authors: | Ismardo Bonalde Ernesto Medina |
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| Affiliation: | a Instituto Venezolano de Investigaciones Científicas, Centro de Física, Apartado 21874, Caracas 1020-A, Venezuela
b Facultad de Ciencias, Centro de Estudios de Semiconductores, Universidad de Los Andes, Mérida 5101, Venezuela |
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| Abstract: | Two previous models used with success in Cu-III-VI2 semiconductors have been employed to study the temperature dependence of the Urbach energy in ordered compounds Cu-III3-VI5 and Cu-III5-VI8. The model which contains two variable parameters seems to explain better the data over the whole temperature range studied. However, the ordered vacancy or the donor acceptor defect pair in the cation sublattice provides new features in these compounds that need further study. |
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| Keywords: | A. Semiconductors A. Electronic materials D. Defects D. Optical properties |
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