Characterization of low-cost organic phosphor for white light-emitting diode

Fuh-Shyang Juang; Ming-Hua Chang; Mark O. Liu; Wen-Ray Chen

doi:10.1117/12.790933

15 February 2008 Characterization of low-cost organic phosphor for white light-emitting diode

Fuh-Shyang Juang, Ming-Hua Chang, Mark O. Liu, Wen-Ray Chen

Proceedings Volume 6894, Gallium Nitride Materials and Devices III; 689429 (2008) https://doi.org/10.1117/12.790933
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

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 (T_d) = 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.

Citation Download Citation

Fuh-Shyang Juang, Ming-Hua Chang, Mark O. Liu, and Wen-Ray Chen "Characterization of low-cost organic phosphor for white light-emitting diode", Proc. SPIE 6894, Gallium Nitride Materials and Devices III, 689429 (15 February 2008); https://doi.org/10.1117/12.790933

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