Near-infrared photoluminescence of PbS QDs precipitated in the glass matrix
SCIE
SCOPUS
- Title
- Near-infrared photoluminescence of PbS QDs precipitated in the glass matrix
- Authors
- Liu, C; Kwon, YK; Heo, J
- Date Issued
- 2008-10
- Publisher
- CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU
- Abstract
- Optical properties of PbS quantum dots (QDs) precipitated inside the oxide glass matrix were investigated. Photoluminescence (PL) spectra were recorded with peak wavelengths located at 1170-1680 nm with peak width of 150-500 nm. Radii of QDs in glasses were 2.0-3.7 nm depending upon the thermal treatment conditions. Changes in temperatures and excitation intensities resulted in the shift of photoluminescence bands as large as 70 nm, due to the laser-induced local heating. Photoluminescence from PbS QDs showed darkening and brightening behavior. Intensity of the photoluminescence increased with time at low temperature (< 150 K) especially when the excitation intensity was low. Photo-darkening was observed when temperature and/or illumination intensities increased. Competition between the photo-brightening and photo-darkening determined the final steady-state photoluminescence intensity. (C)2008 The Ceramic Society of Japan. All Rights reserved.
- Keywords
- PbS quantum dots; Photoluminescence; Local heating; Photo-brightening; Photo-darkening; QUANTUM DOTS; NANOCRYSTALS; EMISSION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22443
- DOI
- 10.2109/jcersj2.116.1071
- ISSN
- 1882-0743
- Article Type
- Article
- Citation
- JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, vol. 116, no. 1358, page. 1071 - 1074, 2008-10
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.