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Titolo:
Modification of ALE-grown SrS thin films by ion implantation of Cu and codopants
Autore:
Sajavaara, T; Lappalainen, R; Arstila, K; Li, WM; Ritala, M; Leskela, M; Soininen, E;
Indirizzi:
Univ Helsinki, Accelerator Lab, FIN-00014 Helsinki, Finland Univ HelsinkiHelsinki Finland FIN-00014 ab, FIN-00014 Helsinki, Finland Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 em, FIN-00014 Helsinki, Finland Planar Int Ltd, FIN-02201 Espoo, Finland Planar Int Ltd Espoo Finland FIN-02201 Int Ltd, FIN-02201 Espoo, Finland
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
fascicolo: 1-4, volume: 148, anno: 1999,
pagine: 715 - 719
SICI:
0168-583X(199901)148:1-4<715:MOASTF>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Keywords:
photoluminescence; electroluminescence; Atomic Layer Epitaxy; implantation; TOF-ERDA; diffusion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Sajavaara, T Univ Helsinki, Accelerator Lab, POB 43, FIN-00014 Helsinki, Finland Univ Helsinki POB 43 Helsinki Finland FIN-00014 nki, Finland
Citazione:
T. Sajavaara et al., "Modification of ALE-grown SrS thin films by ion implantation of Cu and codopants", NUCL INST B, 148(1-4), 1999, pp. 715-719

Abstract

Atomic Layer Epitaxy (ALE) grown Al2O3/SrS/AlxTiyOz/glass films were ion-implanted and annealed to study photoluminescence (PL) characteristics of potential blue color phosphors, Cu-63(+) and Cl-37(+) or O-18(+) ions with partially overlapping spots were implanted with three doses (0.2, 0.6 and 1.7x10(16) at./cm(2)) using ion energies 60, 80 and 120 keV for O-18(+), Cl-37(+) and Cu-63(+), respectively. Cu acts in SrS as an activator, while O andCl are possible codopants, Samples were annealed in N-2 atmosphere at 600 degrees C and 800 degrees C for 2 h, Time-of-flight elastic recoil detection analysis (TOF-ERDA) using 34 MeV I-127 ions as projectiles was utilized to study diffusion of implanted ions and impurity concentrations. All samples showed green PL. Those codoped with O-18 and annealed at 600 degrees C showed enhanced PL intensity compared to only Cu implanted samples. Cl-37 codoping shifted the peak maximum from 520 nm towards blue by 20 nm without decreasing intensity when annealed at 600 degrees C. In TOF-ERDA analysis, O-18 was found to diffuse through the SrS/ATO interface, Cl-37 evaporated mainly out and Cu-63 remained inside the SrS film. The oxygen impurity concentration increased when samples were annealed at higher temperatures. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 06:38:21