Excitonic Luminescence Spectra and Electrical Transport Properties of Photosensitive CdSe Layers Grown on Mica in a Quasi-Closed System
| Autor: | V. I. Chukita, V. S. Feshchenko, M. V. Chukichev, I. N. Odin, V. G. Surinov, E. A. Senokosov |
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| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Materials science Cadmium selenide business.industry Phonon General Chemical Engineering Muscovite Metals and Alloys Cathodoluminescence engineering.material Inorganic Chemistry chemistry.chemical_compound Semiconductor chemistry Materials Chemistry engineering Optoelectronics Mica business Dark current |
| Zdroj: | Inorganic Materials. 57:669-673 |
| ISSN: | 1608-3172 0020-1685 |
| Popis: | CdSe layers having high photosensitivity (photocurrent to dark current ratio of 6.2 × 104) and an extremely low carrier concentration (9 × 1011 cm–3) have been grown on muscovite mica by thermal evaporation in a quasi-closed system. These results are of interest for producing materials for position-sensitive semiconductor photodetectors based on CdSe layers. We have demonstrated that the 78-K cathodoluminescence spectra of the cadmium selenide layers grown at 853 K have a single line, corresponding to radiative annihilation of free A-excitons. The spectra of the layers grown at 833 K show a line of free A-excitons and its first phonon replica. |
| Databáze: | OpenAIRE |
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