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http://dx.doi.org/10.5757/JKVS.2011.20.4.288

Electro-Optical Characteristics and Analysis of 1×1 mm2 Large-Area InGaN/GaN Green LED  

Jang, L.W. (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Jo, D.S. (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Jeon, J.W. (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Ahn, Tae-Young (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Park, M.J. (Department of Printed Electronics Engineering, Sunchon National University)
Ahn, B.J. (Department of Physics, Kongju National University)
Song, J.H. (Department of Physics, Kongju National University)
Kwak, J.S. (Department of Printed Electronics Engineering, Sunchon National University)
Kim, Jin-Soo (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Lee, I.H. (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Ahn, H.K. (School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University)
Publication Information
Journal of the Korean Vacuum Society / v.20, no.4, 2011 , pp. 288-293 More about this Journal
Abstract
We investigated the effects of piezoelectric field on the electro-absorption characteristics in InGaN/GaN multiple-quantum well (MQW) green light emitting diodes (LED). Double crystal X-ray diffraction measurement was performed to study the crystalline property and indium (In) composition in the MQW active layer. To measure the electro-luminescence and electro-reflectance (ER) spectroscopy, we fabricated the $1{\times}1\;mm^2$ large-area green LED chip. The piezoelectric field inside the LED structure was evaluated from the Vcomp in active layer by the ER spectra. Finally, we analyzed the electro-absorption characteristics of the green LED by using the photo-current spectroscopy.
Keywords
Metal-organic chemical vapor deposition; Light emitting diodes; Piezoelectric field; Electro-reflectance; Photo-current;
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