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Two-dimensional correlation analysis of the time-resolved photoluminescence spectra of gallium nitride nanowires

Title
Two-dimensional correlation analysis of the time-resolved photoluminescence spectra of gallium nitride nanowires
Authors
Chon, BRyu, SRHong, YJYoo, JYi, GCJoo, TJung, YM이규철
Date Issued
Jan-2008
Publisher
ELSEVIER SCIENCE BV
Abstract
Principal component analysis based two-dimensional (PCA2D) correlation spectroscopy combined with the eigenvalue manipulating transformation (EMT) technique by lowering the power of a set of eigenvalues associated with the original data has been employed to interpret the time-resolved photoluminescence spectra of gallium nitride (GaN) nanowires. PCA2D correlation spectra with EMT operation successfully extracted the substantial contribution of minor components, by emphasizing the neutral-acceptor-bound exciton band and surface-related state band. Upon application of PCA2D correlation analysis in conjunction with the self-modeling curve resolution technique, we were able to not only resolve the spectra and determine the sequence of spectral changes but also extract the individual spectra, which had not been possible from a simple examination of the original 1D spectra. (C) 2007 Elsevier B.V. All rights reserved.
Keywords
GaN nanowires; time-resolved photoluminescence spectra; two-dimensional (2D) correlation spectroscopy; PCA2D correlation spectroscopy; eigenvalue manipulating transformation (EMT); self-modeling curve resolution (SMCR) analysis; VAPOR-PHASE EPITAXY; MANIPULATION TRANSFORMATION EMT; CORRELATION SPECTROSCOPY; SPECTROELECTROCHEMICAL DATA; GAN NANOWIRES; QUANTUM DOTS; TRANSITIONS; EXCITON
URI
http://oasis.postech.ac.kr/handle/2014.oak/22647
DOI
10.1016/J.MOLSTRUC.2
ISSN
0022-2860
Article Type
PROCEEDINGS PAPER
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