Kinetic parameters of charge carrier traps in magnesium-aluminum spinel crystals after X-ray and UV irradiation

• Дата: 2006
• Автори: Kobyakov, V.A., Volokitin, V.N., Shevtsova, D.N., Lytvynov, L.A.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2006
• Назва видання: Functional Materials
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/139606
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Kinetic parameters of charge carrier traps in magnesium-aluminum spinel crystals after X-ray and UV irradiation / V.A. Kobyakov, V.N. Volokitin, D.N. Shevtsova, L.A. Lytvynov // Functional Materials. — 2006. — Т. 13, № 1. — С. 60-65. — Бібліогр.: 13 назв. — англ.

Thermoluminescence (TL) of non-stoichiometric MgO‧2.5Аl₂O₃ spinel single crystals in the green emission range after X-ray and UV irradiation has been studied. The TL maximum at 420 К emitted within that spectral region at linear heating has been found to be a complex one in spectral composition and in temperature. Using the self-consistent heating, the temperature positions of TL maxima caused by release of charge carriers from a set of traps at various activation energies. The recombination luminescence observed has been shown to occur only according to the second order kinetics. The occupation efficiency of shallow traps of charge carriers is found to increase after UV irradiation. The activation energy values and effective frequency factors have been determined for some traps.