No abstract

a This study outlines a general but convenient approach to the synthesis of Ce 3+ :Y 3 Al 5 O 12 phosphor-inglass (PiG) with a relative low sintering temperature. A comparative study of as-synthesized PiG and glass ceramic prepared by conventional route was carried out to explore the structural, morphological and optical properties. In addition, the effect of phosphor concentration, sintering temperature/time on the luminescence properties was systematically investigated. Notable, we fabricated a high-performance white LED based on PiG with high luminous efficacy ( 125 lmW), low correlated colour temperature (4329 K) and color rendering index of 68. Furthermore, the PiG material demonstrates an excellent thermal stability up to 150 ℃, superior to low thermal stability of conventional Ce 3+ :Y 3 Al 5 O 12 doped silicone. Therefore, the present transparent phosphor glass will have desirable potential for application in the high powered W-LEDs.robust, long-lifetime and environment-friendly features. [1][2][3][4][5][6][7][8][9] Currently, a blue InGaN chip combines with yellow Ce:YAG phosphors mixed with silicone or organic resin is still the dominant technique for fabricating commercial white LEDs. 10,11 Such silicones or organic resins are likely to deteriorate and turn yellow under long-term exposure to high temperature, which is ascribed to its poor thermal conductivity and low thermal stability, leading to the degradation in LE and shifting on chromaticity. 12,13 Therefore, the exploration and development of good thermal-stable carriers for phosphors in the high power WLEDs is urgently necessary.Recently, glass-based encapsulants have been investigated profoundly and broadly for enhancing the thermal and moisture stability of phosphor. Among these, phosphor-in-glass (PiG), dispersing phosphors directly into glass matrices, exhibited its superiority as encapsulant over phosphor-in-silicone (PiS) in terms

No abstract

No abstract

No abstract