Photophysical and structural characterisation of in situ formed quantum dots

A. K. Bansal, F. Antolini, M. T. Sajjad, L. Stroea, R. Mazzaro, S. G. Ramkumar, K. -J. Kass, S. Allard, U. Scherf, I. D. W. Samuel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)9556-9564
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number20
DOIs
Publication statusPublished - 11 Apr 2014

Keywords

  • Organic-inorganic nanocomposites
  • Energy-transfer
  • Solar-cells
  • Emitting polymers
  • Charge separation
  • Nanocrystals
  • Nanoparticles
  • CDSE
  • Precursors
  • Devices

Fingerprint

Dive into the research topics of 'Photophysical and structural characterisation of in situ formed quantum dots'. Together they form a unique fingerprint.

Cite this