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Proceedings Paper

White light upconversion emissions in Er3+/Tm3+/Yb3+ tridoped oxyfluoride glass
Author(s): Xiaoping Guan; Wei Xu; Shuang Zhu; Qiutong Song; Xijun Wu; Hailong Liu
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Paper Abstract

Rare earth ions doped glasses producing visible upconversion emissions are of great interest due to their potential applications in the photonics filed. In fact, practical application of upconversion emissions has been used to obtain color image displays and white light sources. However, there are few reports on the thermal effect on tuning the emission color of the RE doped materials. In this work, the Er3+/Tm3+/Yb3+ tridoped oxyfluoride glasses were prepared through high temperature solid-state method. Under a 980 nm diode laser excitation, the upconversion emissions from the samples were studied. At room-temperature, bright white luminescence, whose CIE chromaticity coordinate was about (0.28, 0.31), can be obtained when the excitation power was 120 mW. The emission color was changed by varying the intensity ratios between RGB bands, which are strongly dependent on the rare earth ions concentration. The temperature dependent color emissions were also investigated. As temperature increased, the intensities for the emission bands presented different decay rates, finally resulting in the changing of the CIE coordinate. When the temperature was 573 K, white light with color coordinate of (0.31, 0.33) was achieved, which matches well with the white reference (0.33, 0.33). The color tunability, high quality of white light and intense emission intensity make the transparent oxyfluoride glasses excellent candidates for applications in solid-state lighting.

Paper Details

Date Published: 15 October 2015
PDF: 7 pages
Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 967403 (15 October 2015); doi: 10.1117/12.2196636
Show Author Affiliations
Xiaoping Guan, Yanshan Univ. (China)
Wei Xu, Yanshan Univ. (China)
Shuang Zhu, Yanshan Univ. (China)
Qiutong Song, Yanshan Univ. (China)
Xijun Wu, Yanshan Univ. (China)
Hailong Liu, Yanshan Univ. (China)

Published in SPIE Proceedings Vol. 9674:
AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Haimei Gong; Nanjian Wu; Yang Ni; Weibiao Chen; Jin Lu, Editor(s)

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