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Titolo:
Photo- and electroluminescence of SrS : Cu and SrS : Ag,Cu,Ga thin films
Autore:
Li, WM; Ritala, M; Leskela, M; Niinisto, L; Soininen, E; Sun, SS; Tong, WS; Summers, CJ;
Indirizzi:
Univ Helsinki, Dept Chem, Inorgan Chem Lab, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ab, FIN-00014 Helsinki, Finland Helsinki Univ Technol, Inorgan & Analyt Chem Lab, FIN-02015 Espoo, FinlandHelsinki Univ Technol Espoo Finland FIN-02015 , FIN-02015 Espoo, Finland Planar Int Ltd, FIN-02201 Espoo, Finland Planar Int Ltd Espoo Finland FIN-02201 Int Ltd, FIN-02201 Espoo, Finland Planar Amer Inc, Beaverton, OR 97006 USA Planar Amer Inc Beaverton OR USA97006 Amer Inc, Beaverton, OR 97006 USA Georgia Inst Technol, Phosphor Technol Ctr Excellence, Atlanta, GA 30332 USA Georgia Inst Technol Atlanta GA USA 30332 cellence, Atlanta, GA 30332 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSICS
fascicolo: 9, volume: 86, anno: 1999,
pagine: 5017 - 5025
SICI:
0021-8979(19991101)86:9<5017:PAEOS:>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALKALI-HALIDES; PHOTOLUMINESCENCE PROPERTIES; OPTICAL-PROPERTIES; CRYSTALS; PHOSPHORS; CENTERS; AG+; LUMINESCENCE; SILVER; COPPER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Li, WM Univ Helsinki, Dept Chem, Inorgan Chem Lab, POB 55, FIN-00014 Helsinki, Finland Univ Helsinki POB 55 Helsinki Finland FIN-00014 Helsinki, Finland
Citazione:
W.M. Li et al., "Photo- and electroluminescence of SrS : Cu and SrS : Ag,Cu,Ga thin films", J APPL PHYS, 86(9), 1999, pp. 5017-5025

Abstract

Photoluminescence (PL) and electroluminescence (EL) of blue and green SrS:Cu thin films prepared by atomic layer epitaxy and molecular beam epitaxy, and blue SrS:Ag,Cu,Ga thin films prepared by sputtering were studied in a temperature range of 80-320 K. Two bands are present both in the PL and EL spectra of SrS:Cu films. The low energy band (L band) at about 520 nm can beobserved throughout the temperature range studied. The high energy band (Hband) at about 460 nm is seen only at higher temperatures and it disappears at 80 K. Decay studies at 80 K reveal at least two types of centers having lifetimes of 100 and 17 mu s with a 10% variation. Several luminescence processes are proposed for further discussions. The L band may be attributedto the emission from an isolated Cu+ ion replacing the host Sr2+ ion but at an off-center site, and it undergoes a redshift caused by aggregated Cu centers. The H band is tentatively described as due to the Cu+ ion at different site symmetry. Blue luminescence of SrS:Ag,Cu,Ga most probably originates from Ag+ pairs. There is no direct evidence of energy transfer from Cu+ to Ag+ but Cu does contribute to the EL. (C) 1999 American Institute of Physics. [S0021- 8979(99)08721-6].

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Documento generato il 27/09/20 alle ore 13:39:17