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Journal of Photonics for Energy

Luminous efficiency enhancement of white light-emitting diodes by using a hybrid phosphor structure
Author(s): Bing-Cheng Lin; Jhih-Kai Huang; Kuo-Ju Chen; Sheng-Huan Chiu; Zong-Yi Tu; Chien-Chung Lin; Po-Tsung Lee; Min-Hsiung Shih; Mei-Tan Wang; Jung-Min Hwang; Hao-Chung Kuo
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Paper Abstract

This paper presents a “hybrid” structure for the coating of yellow YAG : Ce3+ phosphor on blue GaN-based light-emitting diodes (LEDs). The luminous efficiency of the hybrid phosphor structure improved by 5.9% and 11.7%, compared with the conventional remote and conformal phosphor structures, respectively, because of the increased intensity of the yellow component. The hybrid structure also has an advantage in the phosphor usage reduction for the LEDs. Furthermore, the electric intensity of the hybrid phosphor structure was calculated for various thicknesses by conducting TFCalc32 simulation, and the enhanced utilization of blue rays was verified. Finally, the experimental results were consistent with the simulation results performed using the Monte-Carlo method.

Paper Details

Date Published: 19 February 2015
PDF: 10 pages
J. Photon. Energy. 5(1) 057603 doi: 10.1117/1.JPE.5.057603
Published in: Journal of Photonics for Energy Volume 5, Issue 1
Show Author Affiliations
Bing-Cheng Lin, National Chiao Tung Univ. (Taiwan)
Jhih-Kai Huang, National Chiao Tung Univ. (Taiwan)
Kuo-Ju Chen, National Chiao Tung Univ. (Taiwan)
Sheng-Huan Chiu, National Chiao Tung Univ. (Taiwan)
Zong-Yi Tu, National Chiao Tung Univ. (Taiwan)
Chien-Chung Lin, National Chiao Tung Univ. (Taiwan)
Po-Tsung Lee, National Chiao Tung Univ. (Taiwan)
Min-Hsiung Shih, Academia Sinica (Taiwan)
Industrial Technology Research Institute (Taiwan)
Mei-Tan Wang, National Sun Yat-Sen Univ. (Taiwan)
Jung-Min Hwang, National Sun Yat-Sen Univ. (Taiwan)
Hao-Chung Kuo, National Chiao Tung Univ. (Taiwan)

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