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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
Citation: 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

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