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Proceedings Paper

Characterization of low-cost organic phosphor for white light-emitting diode
Author(s): Fuh-Shyang Juang; Ming-Hua Chang; Mark O. Liu; Wen-Ray Chen
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Paper Abstract

In this work, we prepared an organic phosphor and investigated its thermal as well as fluorescent properties. The experimental results reveal that lab-made organic phosphor exhibits excellent thermal stability (Decomposition temperature (Td) = 374 °C) and good fluorescent quantum yield (Φ = 0.88). The organic phosphor was then coated onto the blue LED chip to form a white light-emitting diode. The size of blue LED die used throughout this work was 15 mil square and the dominated wavelength was 460 nm. For the package process, the organic phosphor was firstly mixed with the epoxy and dipped it into the LED bowl of lead frame. Secondly, the pure epoxy resin was full-filled within the lamp model. For the measurement of spectrum and the C.I.E. value, it was found that the near white weight proportional of the epoxy resin A, B and the organic phosphor were 1 : 1 : 0.1.

Paper Details

Date Published: 15 February 2008
PDF: 8 pages
Proc. SPIE 6894, Gallium Nitride Materials and Devices III, 689429 (15 February 2008); doi: 10.1117/12.790933
Show Author Affiliations
Fuh-Shyang Juang, National Formosa Univ. (Taiwan)
Ming-Hua Chang, Industrial Technology Research Institute (Taiwan)
Mark O. Liu, Industrial Technology Research Institute (Taiwan)
Wen-Ray Chen, National Formosa Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6894:
Gallium Nitride Materials and Devices III
Hadis Morkoç; Cole W. Litton; Jen-Inn Chyi; Yasushi Nanishi; Euijoon Yoon, Editor(s)

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