NDLI: Heat treatment temperature effect on the microstructure and optical properties of Dy$_{2}$(WO$_{4}$)$

Content Provider	Springer Nature Link
Author	Zhang, Wenyan Lu, Chunhua Ni, Yaru Song, Jianbin Huang, Wenjuan Tao, Jing Xu, Zhongzi
Copyright Year	2013
Abstract	Dy$_{2}$(WO$_{4}$)$_{3}$ powders were synthesized through liquid-phase reaction. The structure transformation of Dy$_{2}$(WO$_{4}$)$_{3}$ 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 Dy$_{2}$(WO$_{4}$)$_{3}$ host could absorb deep UV light and transfer the energy of UV light to Dy$^{3+}$ 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 Dy$_{2}$(WO$_{4}$)$_{3}$ 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 Dy$_{2}$(WO$_{4}$)$_{3}$ hosts. The bands of W-O$_{d}$ anti-symmetric stretching vibration exhibited red shift with the increasing of sintering temperature. The W-O$_{b}$-W groups tended to combine with each other to form W-O$_{c}$-W groups after heat treating. These regulation of micro-structure had influence on the luminescent color of Dy$_{2}$(WO$_{4}$)$_{3}$. 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 Dy$_{2}$(WO$_{4}$)$_{3}$ powders have potential to act as UV absorber for solar cell to improve the conversion efficiency and also exhibit potential for white light LED.
Starting Page	862
Ending Page	867
Page Count	6
File Format	PDF
ISSN	10002413
Journal	Journal of Wuhan University of Technology-Mater. Sci. Ed.
Volume Number	28
Issue Number	5
e-ISSN	19930437
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-10-05
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	rare earth tungstates optical properties microstructure Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Science

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