NDLI: Luminescence of CsBr:Eu films grown by liquid-phase epitaxy

Content Provider	Springer Nature Link
Author	Zorenko, Yu. V. Turchak, R. M. Voznyak, T. I. Luchechko, A. P.
Copyright Year	2006
Abstract	By liquid-phase epitaxy from an aqueous alcoholic solution, we have obtained films of the well-known storage phospor CsBr:Eu, and we have studied their cathodoluminescence and photoluminescence (PL) spectra compared with the undoped CsBr films. We have established that the structure of the photoluminescence centers of the CsBr:Eu films when excited by laser radiation in the absorption band of the Eu$^{2+}$ ions (λ = 337 nm) includes Eu$^{2+}$-V$_{Cs}$ isolated dipole centers and CsEuBr$_{3}$ aggregate centers, and also luminescence centers based on inclusions of hydroxyl group OH$^{−}$ with the corresponding emission bands in the 440 nm, 520 nm, and 600 nm regions. We have studied the dependence of the spectra and the intensity of the photoluminescence for CsBr:Eu films on annealing temperature in air at 423–483 K, compared with analogous dependences for CsBr:Eu single crystals obtained from the melt. We have shown that annealing the films at T = 423–463 K leads to rapid formation of CsEuBr3 aggregate luminescence centers, while for T > 473 K thermal degradation of these centers occurs. We conclude that the observed differences between the photoluminescence spectra of CsBr:Eu films and CsBr:Eu single crystals may be due to additional doping of the films with OH$^{−}$ ions.
Starting Page	211
Ending Page	215
Page Count	5
File Format	PDF
ISSN	00219037
Journal	Journal of Applied Spectroscopy
Volume Number	73
Issue Number	2
e-ISSN	15738647
Language	English
Publisher	Kluwer Academic Publishers-Consultants Bureau
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	storage phosphors CsBr:Eu$^{2+}$ liquid-phase epitaxy luminescence thermal annealing Analytical Chemistry Atomic and Molecular Structure and Spectra
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Condensed Matter Physics

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