Auger electron/X-ray photoelectron and cathodoluminescent spectroscopic studies of pulsed laser ablated SrAl2O4:Eu2+,Dy3+ thin films

被引：21

作者：

Nsimama, P. D. ^{[1
,2
]}

Ntwaeaborwa, O. M. ^{[1
]}

Swart, H. C. ^{[1
]}

机构：

[1] Univ Orange Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[2] Dar Es Salaam Inst Technol, Dept Lab Technol, Dar Es Salaam, Tanzania

来源：

APPLIED SURFACE SCIENCE | 2010年 / 257卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

SrAl2O4:Eu2+; Dy3+; CL; Electron degradation; ESSCR; SOL-GEL PROCESS; POWDER PHOSPHORS; DEGRADATION; LUMINESCENCE; BOMBARDMENT;

D O I：

10.1016/j.apsusc.2010.07.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Auger electron/X-ray photoelectron and cathodoluminescent (CL) spectroscopic studies were conducted on pulsed laser deposited SrAl2O4:Eu2+,Dy3+ thin films and the correlation between the surface chemical reactions and the decrease in the CL intensity was determined. The Auger electron and the CL data were collected simultaneously in a vacuum chamber either maintained at base pressure or backfilled with oxygen gas. The data were collected when the films were irradiated for 14 h with 2 keV electrons. The CL emission peak attributed to the 4f(6)5d(1)-> 4f(7) transitions was observed at similar to 521 nm and the CL intensity of the peaks degraded at different rates in different vacuum conditions. X-ray photoelectron spectroscopy (XPS) data collected from degraded films suggest that strontium oxide (SrO) and aliminium oxide (Al2O3) were formed on the surface of the film as a result of electron stimulated surface chemical reaction (ESSCR). (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：512 / 517

页数：6

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