Efficient excitation transfer from polymer to nanocrystals

Tung Wah Frederick Chang*, Sergei Musikhin, Ludmila Bakueva, Larissa Levina, Margaret A. Hines, Paul W. Cyr, Edward H. Sargent

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

The efficiency of net transfer of excitation in the polymer to the nanocrystals (NC) was investigated using the normalized photoluminescence excitation spectrum Q(λ) of NCs. The PbS nanocrystals embedded in MEH-PPV (poly[2-methoxy-5-(2́-ethylhexyloxy-p-phenylenevinylene)]) polymer were studied. The excitation transfer efficiency was found to be about 20%, when the composites were made using as-synthesized PbS nanocrystals capped by oleate ligands. It was shown that long insulating ligands did not impede the transfer of excitations from polymers to NCs. The results show that the transfer efficiency increases as the ligand chain length decreases.

Original languageEnglish (US)
Pages (from-to)4295-4297
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number21
DOIs
StatePublished - May 24 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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