Enhancement of band-edge luminescence and photo-stability in colloidal CdSe quantum dots by various surface passivation technologies

Authors
Xu, L Chen, KJ El-Khair, HM Li, MH Huang, XF
Citation
L. Xu et al., Enhancement of band-edge luminescence and photo-stability in colloidal CdSe quantum dots by various surface passivation technologies, APPL SURF S, 172(1-2), 2001, pp. 84-88
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
APPLIED SURFACE SCIENCE
ISSN journal
01694332 → ACNP
Volume
172
Issue
1-2
Year of publication
2001
Pages
84 - 88
Database
ISI
SICI code
0169-4332(20010301)172:1-2<84:EOBLAP>2.0.ZU;2-I
Abstract
Gelatin stabilized and AOT (sodium dioctyl sulfosuccinate) coated colloidal CdSe quantum dots (QDs) have been synthesized in aqueous solution and in m icelle solution respectively. Photoluminescence spectra studies show that c omparing to gelatin stabilized CdSe QDs, organic AOT stabilized CdSe QDs ex hibit an enhancement of hand-edge luminescence due to the surface passivati on. We also use a higher band gap inorganic CdS for passivating layer on th e core CdSe QDs. Our results indicate that CdSe/CdS QDs system shows both h igher band-edge luminescence yield and greater stability under light illumi nation. (C) 2001 Elsevier Science B.V. All rights reserved.