Quenching of semiconductor quantum dot photoluminescence by π-conjugated polymer

Donald Selmarten, Marcus Jones, Garry Rumbles, Pingrong Yu, Jovan Nedeljkovic, Sean Shaheen

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62 Citations (Scopus)

Abstract

In this communication we discuss the possibility of hole transfer between a photoexcited semiconductor quantum dot and a π-conjugated polymer. This charge-transfer event will be investigated (exploited) on the basis of its implication toward a solar energy conversion scheme. Experimentally, we show that the steady-state photoluminescence (PL) of a solution of InP quantum dots is quenched by the introduction of solvated poly-(3-hexylthiophene). Time-resolved PL experiments on these solutions are also presented. It was observed that the PL transients did not significantly change upon the addition of the conductive polymer. These new results indicate that said PL quenching is static in nature. This suggests that in solution, the quantum dot and the polymer exhibit a strong intermolecular interaction. As the two species encounter each other through diffusion, the polymer quenches the quantum dot photoluminescence without altering the population's PL lifetime. This new evidence suggests that the polymer and the quantum dot form a relatively stable complex.

Original languageEnglish
Pages (from-to)15927-15932
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number33
DOIs
Publication statusPublished - Aug 25 2005

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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