Effect of Sintering Temperature on Luminescence Properties of Color Conversion Glasses in Borosilicate Glasses

【Author】

LI Yang;HU Li-Li;YANG Bo-Bo;SHI Ming-Ming;ZOU Jun

【Institution】

Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;School of Material Science and Engineering, Shanghai Institute of Technology;Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences;School of Science, Shanghai Institute of Technology;School of Science, Shanghai Institute of Technology;School of Science, Shanghai Institute of Technology

【Abstract】

The color conversion glass is a promising material for light emitting diodes encapsulation due to its high thermal conductivity and good thermal stability. In present study, color conversion glasses were prepared by sintering a mixture of borosilicate glass frits and a YAG phosphor at temperature from 600 °C to 900 °C. The effects of sintering temperature on luminescence properties were examined. Characteristics of color conversion glasses, with respect to luminescence intensity, CIE (Commission International de I’Eclairage) chromaticity and CCT (Correlated Color Temperature) were analyzed based on luminescence excitation and emission spectra. These characteristics are dependent on sintering temperature of the color conversion glasses. The CIE coordinates shift with the increase of sintering temperature. The glass, sintered at 700 °C, shows the best luminescence properties. But for the glasses sintered above 850 °C, their luminescence properties may be destroyed. Test results of X-ray diffraction (XRD), differential scanning calorimetry (DSC)and X-ray photoelectron spectroscopy (XPS) reveal that degradation of luminescence properties with the increase of sintering temperature is ascribed to the lattice disturbance of YAG and oxidation of Ce 3+, which is caused by reactions between glass matrix and YAG phosphors. The present study may promote the application of color conversion glasses in light emitting diodes encapsulation.

【Keywords】

Ce:YAG color conversion glass;luminescence intensity;CIE coordinates shift;sintering temperature

References

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Total: 17 articles

  • [1] 张中太, 等编著, 无机光致发光材料及应用, 化学工业出版社, 2011
  • [2] ZHANG Yan;LIU Sheng;XU Hong-Jie;WANG Lian-Jun;JIANG Wan;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University;Shanghai Career Metallurgy Furnace Material Co.,Ktd.;, Preparation and Performance of Ce:YAG Phosphor-in-glass, Journal of Inorganic Materials, 2015 (06)
  • [3] WANG Lian-ming;ZHUANG Li-qiang;HUANG Yue-xia;WANG De-qiang;School of Materials Science and Engineering,East China University of Science and Technology;, Application of XPS in Semi-quantitative Estimation of Ce~(3+) in YAG:Ce~(3+) Phosphor, Journal of East China University of Science and Technology(Natural Science Edition), 2015 (04)
  • [4] 陈珍霞, Research on Low Melting Luminescent Glass for White-light-LED, 武汉理工大学, 2010

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