Systematic Analysis of the Photocurrent Spectroscopy on InGaN/GaN Blue Light-Emitting Diodes

Title
Systematic Analysis of the Photocurrent Spectroscopy on InGaN/GaN Blue Light-Emitting Diodes
Other Titles
GaN Blue Light-Emitting Diodes
Author
신동수
Keywords
Photocurrent spectroscopy; light-emitting diode; Stokes shift; joint density of states; QUANTUM-WELLS; EXCITON LOCALIZATION; SHIFT; POLARIZATION; EMISSION; GAN; HETEROSTRUCTURES; FIELD
Issue Date
2013-10
Publisher
IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS
Citation
IEEE JOURNAL OF QUANTUM ELECTRONICS, 2013, 49(12), P1062-1065
Abstract
We demonstrate a method of systematic analysis for the photocurrent spectroscopy on InGaN/GaN light-emitting diodes (LEDs). By normalizing photocurrent data at a photon energy of 3.2 eV for blue LEDs, we show that accurate comparison of active quantum wells is possible. Bias-dependent photocurrent measurements reveal that there are fixed points in photocurrent data from which an effective bandgap energy can be determined. The method presented in this paper can be useful when one needs to compare the LEDs fabricated at different times or by different processes.
URI
http://ieeexplore.ieee.org/document/6646228/http://hdl.handle.net/20.500.11754/44961
ISSN
0018-9197
DOI
10.1109/JQE.2013.2287100
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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