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Optical Properties as Coating Process of Complex Phosphor for White LED

백색 LED용 복합형광체의 코팅공정에 따른 광 특성

Lee, Hyo-Sung;Kim, Byung-Ho;Hwang, Jong Hee;Lim, Tae-Young;Kim, Jin-Ho;Jeon, Dae-Woo;Jung, Hyun-Suk;Lee, Mi Jai
이효성;김병호;황종희;임태영;김진호;전대우;정현석;이미재

  • Received : 2015.09.25
  • Accepted : 2015.12.16
  • Published : 2016.01.27

Abstract

In this study, we fabricated high quality color conversion component with green/red phosphor and low melting glass frit. The color conversion component was prepared by placing the green and red phosphor layer on slide glass via screen printing process. The properties of color conversion component could be controlled by changing coating sequence, layer thickness and heat treatment temperature. We discovered that optical properties of color conversion component were generally determined by the lowest layer. On the other hand, the heat treatment temperature also affected to correlated color temperature (CCT) and color rending index (CRI). The color conversion component with a green (lower) - red (upper) layer which was sintered at $550^{\circ}C$ showed the best optical properties: CCT, CRI and luminance efficacy were 3340 K, 78, and 56.5 lm/w, respectively.

Keywords

remote phosphor;white LED package;color glass;color conversion component;phosphor

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Acknowledgement

Supported by : Ministry of Trade Industry & Energy