Mechanism of photoinduced luminescence degradation in CdSxSe₁₋x quantum dots
A possible mechanism of the photoinduced luminescence degradation in the hexagonal CdSxSe₁₋x quantum dots synthesized in a glass matrix is discussed using luminescence decay kinetic investigations and ab initio calculations of chemical bond energies at the boundary between CdSe cluster and SiOx frag...
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| Veröffentlicht in: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Datum: | 2003 |
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2003
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/118033 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Mechanism of photoinduced luminescence degradation in CdSxSe₁₋x quantum dots / V.P. Kunets, N.R. Kulish, M.P. Lisitsa, V.P. Bryksa // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2003. — Т. 6, № 3. — С. 299-302. — Бібліогр.: 15 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | A possible mechanism of the photoinduced luminescence degradation in the hexagonal CdSxSe₁₋x quantum dots synthesized in a glass matrix is discussed using luminescence decay kinetic investigations and ab initio calculations of chemical bond energies at the boundary between CdSe cluster and SiOx fragment. The mechanism implies that the photoinduced break of Se-O bonds increases the electric field inside a quantum dot, which stimulates diffusion of the cadmium vacancy to the surface. This mechanism enables to explain the luminescence photodarkening effect in quantum dots as well as the degradation of the nonlinear optical device parameters.
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| ISSN: | 1560-8034 |