Up-conversion luminescence properties and energy transfer of Er3+/Yb3+ co-doped oxyfluoride glass ceramic containing CaF2 nano-crystals

doi:10.1088/1674-1056/23/5/057802

Abstract The Er³⁺/Yb³⁺ co-doped transparent oxyfluoride glass-ceramics containing CaF₂ nano-crystals were successfully prepared. After heat treatments, transmission electron microscopy (TEM) images showed that CaF₂ nano-crystals of 20-30 nm in diameter precipitated uniformly in the glass matrix. Comparing with the host glass, high efficiency upconversion luminescence of Er³⁺ at 540 nm and 658 nm was observed in the glass ceramics under the excitation of 980 nm. Moreover, the size of the precipitated nano-crystals can be controlled by heat-treatment temperature and time. With the increase of the nano-crystal size, the intensity of the red emission increased more rapidly than that of the green emission. The energy transfer process of Er³⁺ and Yb³⁺ was convinced and the possible mechanism of Er³⁺ up-conversion was discussed.

Keywords: nano-crystals up-conversion luminescence Er³⁺/Yb³⁺ co-doped glass ceramics

Received: 21 August 2013
Revised: 26 November 2013
Accepted manuscript online:

PACS:	78.40.-q	(Absorption and reflection spectra: visible and ultraviolet)
	42.70.-a	(Optical materials)
	78.66.Jg	(Amorphous semiconductors; glasses)
	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61265004, 51272097, and 11204113) and the Nature and Science Fund from Yunnan Province Ministry of Education, China (Grant No. 2011C13211708).

Corresponding Authors: Qiu Jian-Bei
E-mail: qiu@kmust.edu.cn

About author: 78.40.-q; 42.70.-a; 78.66.Jg; 78.67.Bf

Cite this article:

Ma Chen-Shuo (马辰硕), Jiao Qing (焦清), Li Long-Ji (李龙基), Zhou Da-Cheng (周大成), Yang Zheng-Wen (杨正文), Song Zhi-Guo (宋志国), Qiu Jian-Bei (邱建备) Up-conversion luminescence properties and energy transfer of Er³⁺/Yb³⁺ co-doped oxyfluoride glass ceramic containing CaF₂ nano-crystals 2014 Chin. Phys. B 23 057802

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Up-conversion luminescence properties and energy transfer of Er3+/Yb3+ co-doped oxyfluoride glass ceramic containing CaF2 nano-crystals

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Up-conversion luminescence properties and energy transfer of Er³⁺/Yb³⁺ co-doped oxyfluoride glass ceramic containing CaF₂ nano-crystals