Synthesis of Y[sub 2]O[sub 3]:Eu, Bi Red Phosphors by Homogeneous Coprecipitation and Their Photoluminescence Behaviors
- 1 January 2005
- journal article
- research article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 152 (8), J93-J98
- https://doi.org/10.1149/1.1940752
Abstract
Bismuth-doped Y2O3:EuY2O3:Eu is used as red phosphors with very high efficiency and appropriate emission wavelength. These red phosphors have been synthesized by homogeneous coprecipitation and solid-state reaction without any flux, which may be used in the field of white LEDs (light-emitting diodes). The crystal structure of bismuth-doped Y2O3:EuY2O3:Eu is cubic (space group: Ia3¯Ia3¯ ) with C2C2 and S6S6 sites. Y2O3:EuY2O3:Eu can be excited by charge transfer (254nm)(254nm) and direct excitation (about 350‐420nm350‐420nm ). When incorporated in Y2O3:EuY2O3:Eu phosphors, Bi3+Bi3+ ions act as a sensitizer for Eu3+Eu3+ ions under 350nm350nm radiation. The energy transferred from Bi3+Bi3+ ions to Eu3+Eu3+ ions by a nonradiation process resulted in the final emission from excited Eu3+Eu3+ ions. The emission is observed at 610<mml:mspace...Keywords
This publication has 21 references indexed in Scilit:
- Optical Properties of Three-Band White Light Emitting DiodesJournal of the Electrochemical Society, 2003
- High-power phosphor-converted light-emitting diodes based on III-NitridesIEEE Journal of Selected Topics in Quantum Electronics, 2002
- Optimization of Yttrium Aluminum Garnet:Ce3+ Phosphors for White Light-Emitting Diodes by Combinatorial Chemistry MethodJournal of the Electrochemical Society, 2002
- Characterization of Photoluminescent (Y1–xEux)2O3 Thin Films Prepared by Metallorganic Chemical Vapor DepositionJournal of the American Ceramic Society, 2000
- Combustion synthesis and photoluminescence of nanocrystalline Y2O3:Eu phosphorsMaterials Research Bulletin, 1997
- The ZnGa2 O 4 Phosphor for Low‐Voltage Blue CathodoluminescenceJournal of the Electrochemical Society, 1991
- Preparation and Properties of Monodispersed Colloidal Particles of Lanthanide Compounds: III, Yttrium(III) and Mixed Yttrium(III)/Cerium(III) SystemsJournal of the American Ceramic Society, 1988
- Luminescent Behavior of Bismuth in Rare-Earth OxidesJournal of the Electrochemical Society, 1967
- On the theory of normal and abnormal grain growthActa Metallurgica, 1965
- Optical Absorption Intensities of Rare-Earth IonsPhysical Review B, 1962