Stable and Color-Tailorable White Light from Blue LEDs Using Color-Converting Phosphor–Glass Composites

Authors

  • Seungryeol Yi,

    Corresponding author
    1. Department of Materials Science and Engineering and Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Gyeongbuk, Korea
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  • Woon Jin Chung,

    1. Institute for Rare Metals & Division of Advanced Materials Engineering, Kongju National University, Chungnam, Korea
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  • Jong Heo

    1. Department of Materials Science and Engineering and Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Gyeongbuk, Korea
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Abstract

Commercial Ce3+:YAG phosphors were embedded in glass frits. Thermal condition for the viscous sintering of the composite materials was optimized. The phosphor–glass composites had maximum external efficiency of 30% and maximum light extraction efficiency of 39%. Color temperatures of the composites composed of fluorescent glass frits containing Eu3+ and Mn2+ combined with blue LEDs shifted from ~7000 to ~4000 K.

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