| Effects of growth pressure on the structural and optical properties of multi quantum wells (MQWs) in blue LED. | |
| | |
MedLine Citation:
|
PMID: 22940530 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
The effects of growth pressure in metal-organic chemical vapor deposition (MOCVD) on the structural and optical properties of InGaN/GaN multiple-quantum-wells (MQWs) grown on c-plane sapphire substrate were investigated by scanning transmission electron microscopy (STEM), atom probe tomography (APT), Raman spectroscopy and electroluminescence (EL) spectroscopy. As the growth pressure decreased, the growth rate of the InGaN layer increased, leading to a decrease in the frequency of the GaN A(1)(LO) mode peak and broadening of its full width half maximum (FWHM). The intensity of the EL spectra peaked at a growth pressure of 250Torr with a narrow FWHM at high forward current. These optical properties are explained by either a high degree of compositional fluctuation of indium in the MQW and/or the high crystallinity of the InGaN layer due to the low growth rate under high pressure. |
| | |
Authors:
|
C G Park; G H Gu; B H Lee; D H Jang |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-7-27 |
Journal Detail:
|
Title: Ultramicroscopy Volume: - ISSN: 1879-2723 ISO Abbreviation: Ultramicroscopy Publication Date: 2012 Jul |
Date Detail:
|
Created Date: 2012-9-3 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7513702 Medline TA: Ultramicroscopy Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2012. Published by Elsevier B.V. |
Affiliation:
|
Department of Materials Science and Engineering (MSE), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea; National Center for Nanomaterials Technology (NCNT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Robust elemental mapping of nanostructures at ultrahigh resolution using event-streamed spectrum ima...
Next Document: Characterization of surface metallic states in SrTiO(3) by means of aberration corrected electron mi...