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Thermofield Cr→Cr²⁺ recharging resulting in anomalous intensification of Cr²⁺ emission in ZnS:Cr thin-film electroluminescent structures

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dc.contributor.author Vlasenko, N.A.
dc.contributor.author Oleksenko, P.F.
dc.contributor.author Denisova, Z.L.
dc.contributor.author Mukhlyo, M.A.
dc.contributor.author Veligura, L.I.
dc.date.accessioned 2017-05-28T18:05:01Z
dc.date.available 2017-05-28T18:05:01Z
dc.date.issued 2007
dc.identifier.citation Thermofield Cr→Cr²⁺ recharging resulting in anomalous intensification of Cr²⁺ emission in ZnS:Cr thin-film electroluminescent structures / N.A. Vlasenko, P.F. Oleksenko, Z.L. Denisova, M.A. Mukhlyo, L.I. Veligura // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2007. — Т. 10, № 3. — С. 87-90. — Бібліогр.: 13 назв. — англ. uk_UA
dc.identifier.issn 1560-8034
dc.identifier.other PACS 78.60.Fi, 73.50.Fq, 71.55.Gs, 68.55.L
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/118131
dc.description.abstract For the first time, an anomalous strong increase of the Cr²⁺ emission intensity (I) with increasing the applied voltage (V) has been discovered in ZnS:Cr thin-film electroluminescent structures (TFELS) instead of the I(V) dependence saturation typical of TFELS of the MISIM type, where M is an electrode, I is an insulator layer and S is an EL film. The dependence of I on the transferred charge (Q) is very superlinear, whereas the luminance of the emission of hot electrons, which takes place simultaneously with the Cr²⁺ emission, increases proportionally to Q as it happens usually in TFELS. The increase of I and Q is accompanied by rising the sample temperature up to 30 – 50 °C. However, the emission spectrum that is inherent to the ⁵E → ⁵T₂ transition in the 3d shell of a Cr²⁺ ion is not changed in this case. The above effects are explained by Cr⁺ → Cr²⁺ thermofield recharging, which results in an increase of the number not only of free electrons, but also of Cr²⁺ radiation centers. The most probable mechanism of such a recharging is the Frenkel-Pool field-stimulated thermal ionization of Cr⁺ ions, whose ionization energy is 0.65…0.82 eV. uk_UA
dc.language.iso en uk_UA
dc.publisher Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України uk_UA
dc.relation.ispartof Semiconductor Physics Quantum Electronics & Optoelectronics
dc.title Thermofield Cr→Cr²⁺ recharging resulting in anomalous intensification of Cr²⁺ emission in ZnS:Cr thin-film electroluminescent structures uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA


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