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Heat treatment temperature effect on the microstructure and optical properties of Dy2(WO4)3 powders

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Abstract

Dy2(WO4)3 powders were synthesized through liquid-phase reaction. The structure transformation of Dy2(WO4)3 powders were analyzed by differential scanning calorimetry (DSC), X-ray diffractometer (XRD) and Fourier transform infrared spectroscopy (FTIR). The optical absorption and photoluminescence properties were characterized by UV-vis-infra diffuse reflectance spectra and fluorescence spectra. The Dy2(WO4)3 host could absorb deep UV light and transfer the energy of UV light to Dy3+ ions, which convert the high-energy UV light to blue light (482 nm, 4 F 9/2→6 H 15/2) and yellow light (547 nm, 4 F 9/2→6 H 13/2). The Dy2(WO4)3 powders could also absorb near UV light and exhibit blue and yellow emissions near 482 and 547 nm, respectively. Heat treating promoted the crystallization and regulated the micro-structure of Dy2(WO4)3 hosts. The bands of W-Od anti-symmetric stretching vibration exhibited red shift with the increasing of sintering temperature. The W-Ob-W groups tended to combine with each other to form W-Oc-W groups after heat treating. These regulation of micro-structure had influence on the luminescent color of Dy2(WO4)3. The samples could emit yellow-green, white-yellow and white light under the excitation of 350 nm after being treated at 600, 800 and 1 000 °C, respectively. The prepared Dy2(WO4)3 powders have potential to act as UV absorber for solar cell to improve the conversion efficiency and also exhibit potential for white light LED.

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Authors and Affiliations

  1. College of Material Science and Engineering, Jinling Institute of Technology, Nanjing, 210009, China

    Wenyan Zhang  (张文妍)

  2. State Key Laboratory of Materials-Orient Chemical Engineering, College of Material Science and Engineering, Nanjing University of Technology, Nanjing, 210009, China

    Chunhua Lu, Yaru Ni, Jianbin Song, Wenjuan Huang, Jing Tao & Zhongzi Xu

Authors
  1. Wenyan Zhang  (张文妍)
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  2. Chunhua Lu
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  3. Yaru Ni
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  4. Jianbin Song
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  5. Wenjuan Huang
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  6. Jing Tao
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  7. Zhongzi Xu
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Correspondence to Wenyan Zhang  (张文妍).

Additional information

Funded by Scientific Development Foundation for Nanjing (No. 2012ZD002), the Scientific Research Foundation of Doctor (No. jit-b-201222), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Climbing Project for Scholars with Innovation of Jiangsu Province (No.SBK200910148), and the National Natural Science Foundation of China (No.20901040/B0111)

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Zhang, W., Lu, C., Ni, Y. et al. Heat treatment temperature effect on the microstructure and optical properties of Dy2(WO4)3 powders. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 862–867 (2013). https://doi.org/10.1007/s11595-013-0783-5

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  • DOI: https://doi.org/10.1007/s11595-013-0783-5

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