Please use this identifier to cite or link to this item:
Title: Dependence of luminescence efficiency of CdSe quantum dots on chemical environments
Authors: Jose, R. 
Ishikawa, M.
Thavasi, V. 
Baba, Y.
Ramakrishna, S. 
Keywords: Cadmium precursors
CdSe adsorption complex
CdSe interaction
CdSe quantum dots
Photoluminescence efficiency
Issue Date: Nov-2008
Source: Jose, R.,Ishikawa, M.,Thavasi, V.,Baba, Y.,Ramakrishna, S. (2008-11). Dependence of luminescence efficiency of CdSe quantum dots on chemical environments. Journal of Nanoscience and Nanotechnology 8 (11) : 5615-5623. ScholarBank@NUS Repository.
Abstract: Dependence of photoluminescence (PL) efficiency (Φ PL) of CdSe quantum dots (QDs) on coordinating solvents, precursors, and dispersing solvents was investigated. The Φ PL of CdSe QDs was ∼0.05 when synthesized at 120 °C using the precursors, cadmium acetate (CdAc) and trioctylphosphine selenide (TOPSe) in trioctylphosphine (TOP). The Φ PL was increased from 0.05 to ∼0.1 when coordinating solvents, trioctylphosphine oxide (TOPO) and hexadecylamine (HDA), were added to the above reaction mixture. The Φ PL was dramatically increased from ∼0.1 to ∼0.7 when CdAc was replaced by cadmium stéarate (CdSt). The Φ PL of CdSe QDs synthesized using cadmium stéarate (CdSt)/TOPSe/TOP/TOPO was measured in butanol, chloroform, hexane, and toluene and found that the Φ PL is strong dispersing solvent-dependent. The DFT analysis at b3lyp/lanl2dz level on the interaction of CdSe QDs with chemical environments showed that oxygen-containing molecules interact strongly with CdSe compared to non-oxygen containing molecules and could influence the Φ PL. Copyright © 2008 American Scientific Publishers. All rights reserved.
Source Title: Journal of Nanoscience and Nanotechnology
ISSN: 15334880
DOI: 10.1166/jnn.2008.255
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Feb 21, 2018

Page view(s)

checked on Feb 22, 2018

Google ScholarTM



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