標題: Particular Failure Mechanism of GaN-Based Alternating Current Light-Emitting Diode Induced by GaO(x) Oxidation
作者: Yen, Hsi-Hsuan
Kuo, Hao-Chung
Yeh, Wen-Yung
光電工程學系
Department of Photonics
公開日期: 1-Aug-2010
摘要: This investigation describes the unique failure mechanism of the Wheatstone bridge circuit-type alternating current light-emitting diode (WB AC-LED). The micro-LEDs in WB AC-LED rectifying branches were reverse biased, and therefore, positive charges (holes) accumulated in the n-type GaN layer under the active region and combined with the GaN material and OH(-) ions to generate GaO(x) oxidation grains. The GaO(x) generation speed was fast with high reverse voltage applied to micro-LEDs, and the expansion of GaO(x) dimensions degraded the opto-electrical characteristics and eventually caused failure of the WB AC-LED. The root-mean-square reverse voltage dropped across each micro-LED from -13.1 to -6.7 V with different micro-LEDs array arrangements extended the WB AC-LED life-time from being less than 650 h to more than 1600 h, respectively.
URI: http://dx.doi.org/10.1109/LPT.2010.2051424
http://hdl.handle.net/11536/32381
ISSN: 1041-1135
DOI: 10.1109/LPT.2010.2051424
期刊: IEEE PHOTONICS TECHNOLOGY LETTERS
Volume: 22
Issue: 15
起始頁: 1168
結束頁: 1170
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