한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제40권2호
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  • Pages.103-106
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  • 2007
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
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백색 발광다이오드의 특성에 대한 황색 형광체의 영향

Effect of Yellow Phosphor on Characteristics of White Light Emitting Diode

  • 발행 : 2007.04.30
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초록

We have investigated the optical and electrical properties of surface mounted white light emitting diode (LED) chips prepared by using yellow phosphors on the blue LED chip. The yellow phosphor mixed with transparent epoxy was coated on the prepared LED chip. The optimum mixing conditions with epoxy and yellow phosphor is obtained at the mixing ratio of epoxy:yellow phosphor = 97:3 wt%. The maximum luminance and light emitting efficiency are above $80,000cd/m^2$ and 23.2 lm/W, respectively, at the bias voltage of 2.9 V. There was no distinct change in the luminance strength with changing of the yellow phosphor ratios. The current of the white LED chip is about 30 mA at 2.9 V.

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참고문헌

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피인용 문헌

  1. Effect of PVA Polymerization on Synthesis of YAG:Ce3+Phosphor Powders Prepared by a Solid-liquid Hybrid Route vol.51, pp.5, 2014, https://doi.org/10.4191/kcers.2014.51.5.424