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Synthesis of a Solid Solution Series of Layered EuxGd1−x(OH)2.5Cl0.5·0.9H2O and Its Transformation into (EuxGd1−x)2O3 with Enhanced Photoluminescence Properties

Authors :
Renzhi Ma
Tadashi C. Ozawa
Takayoshi Sasaki
Linfeng Hu
Source :
Inorganic Chemistry. 49:2960-2968
Publication Year :
2010
Publisher :
American Chemical Society (ACS), 2010.

Abstract

The synthesis of a series of new layered rare-earth hydroxide solid solutions and their transformation into (EuxGd1−x)2O3 crystallites are described. Highly crystalline platelets of EuxGd1−x(OH)2.5Cl0.5·0.9H2O solid solutions with various Eu3+/Gd3+ ratios were prepared through a homogeneous precipitation method. The hydroxide solid-solution samples exhibited characteristic Eu3+ photoluminescence properties through the energy transfer from Gd3+ to Eu3+ and the self-excitation of Eu3+. Cubic (EuxGd1−x)2O3 crystallites were obtained via quasi-topotactic transformation of EuxGd1−x(OH)2.5Cl0.5·0.9H2O solid solutions above 800 °C. The as-transformed cubic (EuxGd1−x)2O3 crystallites well retained the original platelet morphology and single crystalline nature, and exhibited greatly enhanced photoluminescence properties with respect to the precursor hydroxides. The Eu3+ content of 0.05 in the cubic (EuxGd1−x)2O3 gave a maximum luminescence intensity, which is comparable with that of a commercial Y2O3:Eu phosphor.

Details

ISSN :
1520510X and 00201669
Volume :
49
Database :
OpenAIRE
Journal :
Inorganic Chemistry
Accession number :
edsair.doi...........1938917f35e1e6b9f4aa96be056682d6
Full Text :
https://doi.org/10.1021/ic902484v