Crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors

Pinglu Shi; Zhiguo Xia; Maxim S. Molokeev; Victor V. Atuchin

doi:10.1039/C4DT00339J

Crystal chemistry and luminescence properties of red-emitting CsGd_1−xEu_x(MoO₄)₂ solid-solution phosphors†

Pinglu Shi,^a Zhiguo Xia,*^ab Maxim S. Molokeev^c and Victor V. Atuchin^def

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* Corresponding authors

^a School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China

^b School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China
E-mail: xiazg@ustb.edu.cn
Fax: +86-10-8237-7955
Tel: +86-10-8237-7955

^c Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia

^d Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia

^e Functional Electronics Laboratory, Tomsk State University, Tomsk 634050, Russia

^f Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk 630090, Russia

Abstract

Scheelite related alkali-metal rare-earth double molybdate compounds with a general formula of ALn(MoO₄)₂ can find wide application as red phosphors. The crystal chemistry and luminescence properties of red-emitting CsGd_1−xEu_x(MoO₄)₂ solid-solution phosphors have been evaluated in the present paper. A detailed analysis of the structural properties indicates the formation of isostructural scheelite-type CsGd_1−xEu_x(MoO₄)₂ solid-solutions over the composition range of 0 ≤ x ≤ 1. The photoluminescence emission (PL) and excitation (PLE) spectra, and the decay curves were measured for this series of compounds. The critical doping concentration of Eu³⁺ is determined to be x = 0.6 in order to realize the maximum emission intensity. The emission spectra of the as-obtained CsGd_(1−x)Eu_x(MoO₄)₂ phosphors show narrow high intensity red lines at 592 and 615 nm upon excitation at 394 or 465 nm, revealing great potential for applications in white light-emitting diode devices.

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Article information

DOI: https://doi.org/10.1039/C4DT00339J
Article type: Paper
Submitted: 31 Jan 2014
Accepted: 28 Mar 2014
First published: 31 Mar 2014

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Dalton Trans., 2014,43, 9669-9676

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Crystal chemistry and luminescence properties of red-emitting CsGd_1−xEu_x(MoO₄)₂ solid-solution phosphors

P. Shi, Z. Xia, M. S. Molokeev and V. V. Atuchin, Dalton Trans., 2014, 43, 9669 DOI: 10.1039/C4DT00339J

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