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dc.contributor.author |
Vlasenko, N.A. |
|
dc.contributor.author |
Oleksenko, P.F. |
|
dc.contributor.author |
Denisova, Z.L. |
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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 |
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dc.date.issued |
2007 |
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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 |
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dc.identifier.other |
PACS 78.60.Fi, 73.50.Fq, 71.55.Gs, 68.55.L |
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dc.identifier.uri |
http://dspace.nbuv.gov.ua/handle/123456789/118131 |
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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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