National Changhua University of Education Institutional Repository : Item 987654321/15272
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6507/11669
Visitors : 29720298      Online Users : 419
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/15272

Title: Influences of Multiquantum Barriers on Carrier Recombination in InGaN/GaN Multiple-Quantum-Well Light-Emitting Diodes
Authors: Nee, Tzer-En;Wang, Jen-Cheng;Shen, Hui-Tang;Wu, Ya-Fen;Shih, Yu-Tai;Lu, Chien-Lin
Contributors: 物理學系
Keywords: Gallium nitride (GaN);Multiple-quantum-well (MQW);Light-emitting diode (LED);Multiquantum barrier (MQB)
Date: 2007-04
Issue Date: 2013-01-07T09:25:50Z
Publisher: The Japan Society of Applied Physics
Abstract: The influences of multiquantum barriers (MQBs) on the carrier confinement and carrier recombination in blue InGaN/GaN multiple-quantum-well (MQW) light-emitting diodes (LEDs) have been investigated in depth over a broad range of temperatures from 20 to 300 K. Time-resolved photoluminescence (TRPL) temporal decay was measured to examine the dynamics of the carriers in both devices. The exciton recombination times of the blue emission are 2.81 and 4.11 ns for the QWs with MQB and GaN barriers, respectively. The former is a reasonable value for the radiative recombination in the structure with MQBs, and results from the enhancement of the exciton confinement. It was found that a device with an MQB structure exhibited higher emission intensity as well as lower temperature sensitivity than the conventional MQW LEDs. The improvement of the quantum efficiency for the MQB device was attributed to the fact that the enhancement of the excitons was confined in the MQW region and inhibited the carrier overflow into the GaN region.
Relation: Jpn. J. Appl. Phys., 46(4B): 2413-2417
Appears in Collections:[Department of Physics] Periodical Articles

Files in This Item:

File SizeFormat
index.html0KbHTML593View/Open


All items in NCUEIR are protected by copyright, with all rights reserved.

 


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback