Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (5): 521-527.DOI: 10.15541/jim20170310

• RESEARCH PAPER • Previous Articles     Next Articles

Multicolor Upconversion Emission Tuning of NaY(WO4)2: Dy3+ via Er3+ Doping

SHI Zhong-Xiang, WANG Jing, GUAN Xin   

  1. Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powders, Dalian Jiaotong University, Dalian 116028, China
  • Received:2017-06-21 Revised:2017-08-15 Published:2018-05-20 Online:2018-04-26
  • About author:SHI Zhong-Xiang. E-mail:
  • Supported by:
    National Key Research and Development Program of China (2017YFB0310300);National Natural Science Foundation of China (51274052);Natural Science Foundation of Liaoning Province (201602134);Project Supported by Department of Education Liaoning Province (JDL2016002)


A series of Dy3+ and Er3+ co-doped NaY(WO4)2 phosphors were synthesized by hydrothermal reactions. X-ray diffraction and scanning electron microscope were used to characterize their crystal structure and morphology. The upconversion luminescent properties and the fluorescence lifetime of 4F9/26H13/2 transition of the Dy3+ ion were also investigated. Moreover, the energy transfer from Dy3+ to Er3+ ions in NaY(WO4)2 : Dy3+, Er3+ was analyzed in detail. The results indicated that all the samples had pure tetragonal crystal structure. Furthermore, the micrometer- sized needle spheres and excellent dispersion of the particles were obtained by adding polyethylene glycol (PEG-2000) as surfactant. Under near infrared light excitation at 780 nm, the NaY(WO4)2 : Dy3+, Er3+ samples exhibited blue emission at 480 nm (4F9/26H15/2 transition of Dy3+), yellow emission at 576 nm (4F9/26H13/2 transition of Dy3+) and green emission at 531 and 554 nm (2H11/24I15/2 and 4S3/24I15/2 transition of Er3+, respectively). The energy transfer process from Dy3+ to Er3+ is a resonant transfer, in which electric dipole-dipole interaction plays a leading role. By adjusting the doping concentration of Er3+ in NaY(WO4)2 : 1.0mol% Dy3+, xmol% Er3+ phosphors, conversion from quasi white light to blue light can be realized.


Key words: up-conversion luminescence, NaY(WO4)2: Dy3+, Er3+, polyethylene glycol, energy transfer

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