Luminescent properties of a water-soluble conjugated polymer incorporating graphene-oxide quantum dots

Penglei Li, Francesco Di Stasio, Goki Eda, Oliver Fenwick, Shane O. McDonnell, Harry L. Anderson, Manish Chhowalla, Franco Cacialli

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report the incorporation of graphene-oxide quantum dots (GOQDs) into films, diluted solutions, and light-emitting diodes (LEDs) as part of a water-soluble derivative of poly(p-phenylene vinylene), or PDV.Li, to investigate their impact on the light-emission properties of this model conjugated polymer. Despite the well-known ability of graphene and graphene oxide to quench the photoluminescence of nearby emitters, we find that the addition of GOQDs to diluted solutions of PDV.Li does not significantly affect the photoluminescence (PL) dynamics of PDV.Li, bringing about only a modest quenching of the PL. However, loading the polymer with GOQDs led to a substantial decrease in the turn-on voltage of LEDs based on GOQD-PDV.Li composites. This effect can be attributed to either the improved morphology of the host polymer, resulting in an increase in the charge mobility, or the enhanced injection through GOQDs near the electrodes.

Original languageEnglish
Pages (from-to)1258-1262
Number of pages5
JournalChemPhysChem
Volume16
Issue number6
DOIs
Publication statusPublished - Apr 27 2015

Keywords

  • blends
  • graphene
  • LEDs
  • photophysics
  • rotaxanes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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    Li, P., Di Stasio, F., Eda, G., Fenwick, O., McDonnell, S. O., Anderson, H. L., Chhowalla, M., & Cacialli, F. (2015). Luminescent properties of a water-soluble conjugated polymer incorporating graphene-oxide quantum dots. ChemPhysChem, 16(6), 1258-1262. https://doi.org/10.1002/cphc.201402744