Fluorescence properties of divalent and trivalent europium ions in CdWO4 single crystals grown by Bridgman method

doi:10.1088/1674-1056/22/2/027804

中国物理B ›› 2013, Vol. 22 ›› Issue (2): 27804-027804.doi: 10.1088/1674-1056/22/2/027804

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method

胡皓阳^a, 夏海平^a, 胡建旭^a, 张约品^a, 江浩川^b, 陈红兵^c

a Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo 315211, China;
b Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences, Ningbo 315211, China;
c Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China

收稿日期:2012-06-19 修回日期:2012-07-30 出版日期:2013-01-01 发布日期:2013-01-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 50972061, 51272109, and 21171102); the Natural Science Foundation of Zhejiang Province of China (Grant Nos. R4100364 and Z4110072); the Natural Science Foundation of Ningbo city (Grant No. 2012A610115); and K. C. Wong Magna Fund in Ningbo University.

Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method

Hu Hao-Yang (胡皓阳)^a, Xia Hai-Ping (夏海平)^a, Hu Jian-Xu (胡建旭)^a, Zhang Yue-Pin (张约品)^a, Jiang Hao-Chuan (江浩川)^b, Chen Hong-Bing (陈红兵)^c

a Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo 315211, China;
b Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences, Ningbo 315211, China;
c Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China

Received:2012-06-19 Revised:2012-07-30 Online:2013-01-01 Published:2013-01-01
Contact: Xia Hai-Ping E-mail:xiahaiping@nbu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 50972061, 51272109, and 21171102); the Natural Science Foundation of Zhejiang Province of China (Grant Nos. R4100364 and Z4110072); the Natural Science Foundation of Ningbo city (Grant No. 2012A610115); and K. C. Wong Magna Fund in Ningbo University.

摘要/Abstract

摘要： Optical absorption, excitation, and fluorescence were investigated in Eu ion-doped CdWO₄ single crystal grown by a modified Bridgman method. The results indicate that Eu²⁺ and Eu³⁺ ions coexist in CdWO₄ crystal and an energy transfer occurs between these Eu²⁺ and Eu³⁺ ions. When the crystal is excited by 266-nm light, the energy corresponding to the 4f⁶5d to ⁸S_7/2 transition of Eu²⁺ ions results in the excitation of the Eu³⁺ ions to the ⁵D_J level. The effect on fluorescence of annealing in oxygen at various temperatures was investigated. The excitation intensity of Eu²⁺ ions at 266 nm decreases as annealing temperature increases from 300 K to 1073 K, but it remains at a certain equilibrium level when the annealing temperature is further increased.

关键词: Eu²⁺ ion, optical spectra, cadmium tungstate, Bridgman method

Abstract: Optical absorption, excitation, and fluorescence were investigated in Eu ion-doped CdWO₄ single crystal grown by a modified Bridgman method. The results indicate that Eu²⁺ and Eu³⁺ ions coexist in CdWO₄ crystal and an energy transfer occurs between these Eu²⁺ and Eu³⁺ ions. When the crystal is excited by 266-nm light, the energy corresponding to the 4f⁶5d to ⁸S_7/2 transition of Eu²⁺ ions results in the excitation of the Eu³⁺ ions to the ⁵D_J level. The effect on fluorescence of annealing in oxygen at various temperatures was investigated. The excitation intensity of Eu²⁺ ions at 266 nm decreases as annealing temperature increases from 300 K to 1073 K, but it remains at a certain equilibrium level when the annealing temperature is further increased.

Key words: Eu²⁺ ion, optical spectra, cadmium tungstate, Bridgman method

中图分类号: (Other solid inorganic materials)

78.55.Hx

78.60.Lc (Optically stimulated luminescence)

胡皓阳, 夏海平, 胡建旭, 张约品, 江浩川, 陈红兵. Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method[J]. 中国物理B, 2013, 22(2): 27804-027804.

Hu Hao-Yang (胡皓阳), Xia Hai-Ping (夏海平), Hu Jian-Xu (胡建旭), Zhang Yue-Pin (张约品), Jiang Hao-Chuan (江浩川), Chen Hong-Bing (陈红兵). Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method[J]. Chin. Phys. B, 2013, 22(2): 27804-027804.

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Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method

Fluorescence properties of divalent and trivalent europium ions in CdWO₄ single crystals grown by Bridgman method

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