Growth and Optical Spectra of Tb3+/Eu3+ Co-doped Cubic NaYF4 Single Crystal for White Light Emitting Diode

doi:10.1016/j.jmst.2015.10.008

J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (12): 1232-1236.DOI: 10.1016/j.jmst.2015.10.008

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Growth and Optical Spectra of Tb³⁺/Eu³⁺ Co-doped Cubic NaYF₄ Single Crystal for White Light Emitting Diode

Yongzhang Jiang¹, Haiping Xia¹, Jiazhong Zhang¹, Shuo Yang¹, Haochuan Jiang², Baojiu Chen³

1 Key Laboratory of Photoelectronic Materials, Ningbo University, Ningbo 315211, China;
2 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315211, China;
3 Department of Physics, Dalian Maritime University, Dalian 116026, China

Received:2015-03-20 Revised:2015-06-15
Contact: Prof., Ph.D.; Tel.: +86 13646674847; Fax: +86 574 87600753. E-mail address: hpxcm@nbu.edu.cn (H. Xia).
Supported by:
This work was supported in part by the National Natural Science Foundation of China (Grant Nos. 51472125 and 51272109) and K.C. Wong Magna Fund in Ningbo University.

Abstract

Abstract: High quality Tb³⁺/Eu³⁺ co-doped cubic NaYF₄ single crystal in the size of Φ1.0 cm × 6.6 cm was grown by a modified Bridgman method using KF as assistant flux for NaF-YF₃ system under the condition of completely closed Pt crucible. A white light emission from the combination of the violet-blue, blue, green, orange, and red lights with chromaticity coordinates of x = 0.3107, y = 0.3274, correlated color temperature of T_c = 6637 K, color rendering index of R_a = 83, and color quality scale of Q_a = 82 could be obtained from 1.51 mol% Tb³⁺ and 1.42 mol% Eu³⁺ co-doped cubic NaYF₄ single crystal when being excited by a 369 nm light. This indicates that Tb³⁺/Eu³⁺ co-doped cubic NaYF₄ single crystal has a potential application in white light emitting diode excited by ultraviolet light.

Key words: Cubic NaYF4 single crystal, KF flux, Tb3+/Eu3+ ions, White light emission

Yongzhang Jiang, Haiping Xia, Jiazhong Zhang, Shuo Yang, Haochuan Jiang, Baojiu Chen. Growth and Optical Spectra of Tb³⁺/Eu³⁺ Co-doped Cubic NaYF₄ Single Crystal for White Light Emitting Diode[J]. J. Mater. Sci. Technol., 2015, 31(12): 1232-1236.

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Growth and Optical Spectra of Tb³⁺/Eu³⁺ Co-doped Cubic NaYF₄ Single Crystal for White Light Emitting Diode

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