Quantum size effect in the photoluminescence properties of p-type semiconducting transparent CuAlO2 nanoparticles

Title
Quantum size effect in the photoluminescence properties of p-type semiconducting transparent CuAlO2 nanoparticles
Author(s)
주상우바너지나라얀민봉기
Keywords
THIN-FILMS; OPTICAL-PROPERTIES; CONDUCTING OXIDES; ROOM-TEMPERATURE; THERMOELECTRIC PROPERTIES; FIELD-EMISSION; ZNO NANORODS; CONFINEMENT; CDS; NANOCRYSTALLITES
Issue Date
201212
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.112, no.11
Abstract
Photoluminescence properties of CuAlO2 nanoparticles, deposited by a cost-effective direct current sputtering technique, have been studied. The nanoparticles show room-temperature photoluminescence peaks of near-band-edge emission due to recombination of free excitons. A blue-shift in the emission peaks as a decreasing function of the nanoparticle sizes is observed, which is attributed to the quantum confinement effect within the CuAlO2 nanoparticles. Theoretical calculations of bandgap enhancement values are found to be matching fairly well with that of the experimentally obtained values, confirming the existence of the quantum size effect within the nanomaterial. Approximate calculations show that the confinement effect falls within moderate-to-weak confinement regime. X-ray diffraction and electron microscopic measurements confirm the proper phase formation and nanocrystalline structure of the as-deposited nanoparticles. The room-temperature and size-dependent photoluminescence properties of this nanomaterial will be very useful for light emitting diode and similar optoelectronic applications. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4768933]
URI
http://hdl.handle.net/YU.REPOSITORY/26706http://dx.doi.org/10.1063/1.4768933
ISSN
0021-8979
Appears in Collections:
공과대학 > 기계공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE