Photoluminescence Blue-Shift of CdSe Nanoparticles Caused by Exchange of Surface Capping Layer

Title
Photoluminescence Blue-Shift of CdSe Nanoparticles Caused by Exchange of Surface Capping Layer
Author(s)
박진호시앙동루오[시앙동루오]페이셍리우[페이셍리우]움메 파바[움메 파바]트롱윈탐윈
Keywords
OPTICAL-PROPERTIES; QUANTUM DOTS; SOLAR-CELLS; NANOCRYSTALS; CDTE
Issue Date
201108
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.115, no.43, pp.20817 - 20823
Abstract
TOPO- and pyridine-capped cubic CdSe quantum dots were prepared, and the effect of surface ligand exchange on the photoluminescence (PL) peak shift was investigated. From the analysis of PL spectra and TEM images, it was found that the decrease in diameter in the CdSe quantum dot and redistribution of its surface electronic density play different roles in the PL peak shift. The reduction in size of CdSe by ligand exchange caused a blue shift of the PL peak due to the quantum confinement effect, whereas the redistribution of surface electronic density of CdSe by the exchange of TOPO with pyridine resulted in a red shift of 23 meV on the average for the samples investigated. The result was also supported by the XPS characterizations.
URI
http://hdl.handle.net/YU.REPOSITORY/24787http://dx.doi.org/10.1021/jp200701x
ISSN
1932-7447
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공과대학 > 화학공학부 > Articles
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