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Proceedings Paper

The influence of phosphor sedimentation on the white LEDs with different structure chip
Author(s): Kwang-Cheol Lee; Deok Gi Kim; Sang-Mook Kim; Hwa-Sub Oh; Jong Hyeob Baek
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Paper Abstract

The influence of phosphor sedimentation on the white light-emitting diode with different structure chip was investigated. The phosphor sedimentation phenomenon occurred seriously as encapsulant viscosity lowers. The influence of phosphor sedimentation on the white light-emitting diode with the vertical structure chip whose one side only emits is larger than that of lateral structure chip whose all sides emit. Hence, Difference in luminous efficacy by the phosphor sedimentation reached about 20 % in the case with the vertical structure chip due to optical loss stemmed from the phosphor sediment layer.

Paper Details

Date Published: 14 December 2011
PDF: 4 pages
Proc. SPIE 8312, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy III, 83120E (14 December 2011); doi: 10.1117/12.905827
Show Author Affiliations
Kwang-Cheol Lee, Korea Photonics Technology Institute (Korea, Republic of)
Deok Gi Kim, Korea Photonics Technology Institute (Korea, Republic of)
Sang-Mook Kim, Korea Photonics Technology Institute (Korea, Republic of)
Hwa-Sub Oh, Korea Photonics Technology Institute (Korea, Republic of)
Jong Hyeob Baek, Korea Photonics Technology Institute (Korea, Republic of)


Published in SPIE Proceedings Vol. 8312:
Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy III
Min Gu, Editor(s)

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