Luminescence of Impurity Ce3+ Centers in KH2PO4 : Ce Crystals

被引：4

作者：

Pustovarov, V. A. ^{[1
]}

Ogorodnikov, I. N. ^{[1
]}

Omel'kov, S. I. ^{[2
]}

机构：

[1] Ural Fed Univ, Ekaterinburg 620002, Russia

[2] Univ Tartu, Inst Phys, EE-50090 Tartu, Estonia

来源：

PHYSICS OF THE SOLID STATE | 2018年 / 60卷 / 01期

关键词：

VACUUM-ULTRAVIOLET; SPECTROSCOPY; ABSORPTION; THALLIUM;

D O I：

10.1134/S1063783418010201

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The photoluminescence, X-ray luminescence, and cathodoluminescence spectra of KH2PO4 : Ce single crystals contain a nonelementary band of radiation with an energy of 3.55 eV and decay time of 27-33 ns. It is formed by fast radiative interconfiguration d -> f transitions between the excited and ground states of Ce3+ ions, with the ground state is split by a crystalline field. In the range of concentrations studied (0.5-3 x 10(-2) wt %), Ce3+ ions enter the KH2PO4 : Ce crystal lattice as substitution ions. Local charge compensation takes place by means of defects in the crystal structure that cause luminescence with a large Stokes shift in the region of 2.4-2.2 eV. The presence of hydrogen sublattice defects decreases the efficiency of energy transport by free charge carriers to the luminescent centers. The interaction of defects and impurity centers manifests itself as a slow inertial building-up of the stationary X-ray luminescence yield of Ce3+ centers.

引用

收藏

页码：147 / 152

页数：6

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