Preparation and luminescent properties of new YAG:Ce3+ phosphor in glass (PIG) for white LED applications
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A yellow-emitting phosphor-in-glass (PIG) material was synthesized by dispersing commercial YAG:Ce3+ phosphor powder in homemade host glass prepared by melting-quenching method. The phase composition, microstructure and photoluminescence properties of PIG were investigated by means of XRD, SEM, fluorescence spectrophotometer and optoelectronic testing system. The results showed that the YAG:Ce3+ phosphor particles were uniformly distributed and well preserved in glass matrix without any decomposition reaction. The bulk PIG can be efficiently exited by 460 nm to emit a broad yellow emission peak (530 nm) attributed to 5d → 4f transition of Ce3+ ion. The optimal luminous property of PIG can be achieved when YAG:Ce3+ phosphor concentration, melting temperature and thickness are 8 wt%, 950 °C and 1.5 mm, respectively. Under driving current of 540 mA, the luminous efficiency of the white LED device packaged by the as-prepared PIG and blue LED chip is 98 lm/W, and its color coordinate, color temperature and color rendering index are (0.300, 0.339), 7125 K and 71, respectively. This finding shows potential applications in white LEDs for the as-prepared PIG material.
This work was financially supported by the Natural Science Foundation of Guangxi Province (2017GXNSFDA198023).
- 12.R. Xiang, X.J. Liang, Q. Xi, Z.F. Yuan, C. Chen, W.D. Xiang, A chromaticity-tunable white LED by screen-printing red phosphor coating on PIG plates. Ceram. Int. 42, 19285–19291 (2016)Google Scholar
- 13.N. Wei, T.C. Lu, F. Li, W. Zhang, B.Y. Ma, Z.W. Lu, J.Q. Qi, Transparent Ce:Y3Al5O12 ceramic phosphors for white light-emitting diodes. Appl. Phys. Lett. 101, 216–225 (2012)Google Scholar
- 14.K.Y. Qian, F. Hu, H.Y. Wu, Y. Luo, Packaging technique of high power white LED. Semicond. Optoelectron. 26, 118–120 (2005)Google Scholar