Abnormal Electrical and Optical Characteristics of InGaN-Based LEDs by Current Stress-Time-Dependent Annihilation
We investigated the behavior of forward leakage current and the related reliability of InGaN-based light emitting diodes with medium constant current (current density J = 17 A\cm 2 ) stress up to 1000 h. When the time of the constant current stress was less than 250 h, the forward leakage current of...
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Published in | IEEE journal of quantum electronics Vol. 48; no. 5; pp. 635 - 642 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
IEEE
01.05.2012
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Subjects | |
Online Access | Get full text |
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Summary: | We investigated the behavior of forward leakage current and the related reliability of InGaN-based light emitting diodes with medium constant current (current density J = 17 A\cm 2 ) stress up to 1000 h. When the time of the constant current stress was less than 250 h, the forward leakage current of a sample rapidly increased to 3.8 μA at 2 V, almost three orders higher in magnitude compared to the value before the stress. Further increasing the stress-time, however, the degradation of the forward current was partially recovered to a certain extent, but not completely. It is believed that this abnormal electrical characteristic is due to the stress-time-dependent creation and annihilation of the tunneling path in the active quantum well region. |
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ISSN: | 0018-9197 1558-1713 |
DOI: | 10.1109/JQE.2012.2189372 |