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Photophysical and structural characterisation of in situ formed quantum dots

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Bansal_2014_PCCP_Photophysical.pdf (2.861Mb)
Date
11/04/2014
Author
Bansal, A. K.
Antolini, F.
Sajjad, M. T.
Stroea, L.
Mazzaro, R.
Ramkumar, S. G.
Kass, K. -J.
Allard, S.
Scherf, U.
Samuel, I. D. W.
Funder
EPSRC
European Commission
Grant ID
EP/J01771X/1
247928
Keywords
Organic-inorganic nanocomposites
Energy-transfer
Solar-cells
Emitting polymers
Charge separation
Nanocrystals
Nanoparticles
CDSE
Precursors
Devices
QC Physics
QD Chemistry
Metadata
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Abstract
Conjugated polymer-semiconductor quantum dot (QD) composites are attracting increasing attention due to the complementary properties of the two classes of materials. We report a convenient method for in situ formation of QDs, and explore the conditions required for light emission of nanocomposite blends. In particular we explore the properties of nanocomposites of the blue emitting polymer poly[9,9-bis(3,5-di-tert-butylphenyl)-9H-fluorene] together with cadmium sulphide (CdS) and cadmium selenide (CdSe) precursors. We show the formation of emissive quantum dots of CdSe from thermally decomposed precursor. The dots are formed inside the polymer matrix and have a photoluminescence quantum yield of 7.5%. Our results show the importance of appropriate energy level alignment, and are relevant to the application of organic-inorganic systems in optoelectronic devices.
Citation
Bansal , A K , Antolini , F , Sajjad , M T , Stroea , L , Mazzaro , R , Ramkumar , S G , Kass , K -J , Allard , S , Scherf , U & Samuel , I D W 2014 , ' Photophysical and structural characterisation of in situ formed quantum dots ' , Physical Chemistry Chemical Physics , vol. 16 , no. 20 , pp. 9556-9564 . https://doi.org/10.1039/c4cp00727a
Publication
Physical Chemistry Chemical Physics
Status
Peer reviewed
DOI
https://doi.org/10.1039/c4cp00727a
ISSN
1463-9076
Type
Journal article
Rights
© Royal Society of Chemistry 2014. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/).
Description
The authors acknowledge financial support from FP7 project “Laser Induced Synthesis of Polymeric Nanocomposite Materials and Development of Micro-patterned Hybrid Light Emitting Diodes (LED) and Transistors (LET)” – LAMP project (G.A. 247928). AKB and IDWS also acknowledge financial support from EPSRC Programme grant “Challenging the limits of photonics: Structured light” EP/J01771X/1.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5196

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