Electronic excitation transfer from an organic matrix to CdS nanocrystals produced by the Langmuir–Blodgett method

A. A. Zarubanov, V. F. Plyusnin, K. S. Zhuravlev

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The absorption, photoluminescence, and photoluminescence excitation spectra of CdS nanocrystals formed by the Langmuir–Blodgett method are explored. Features of the absorption and photoluminescence excitation spectra defined by optical transitions in the matrix and nanocrystals are identified. The efficiency of electronic excitation transfer from an organic matrix to nanocrystals is studied. It is shown that charge carriers efficiently transfer from the matrix to electron and hole size-quantization levels in nanocrystals and to acceptor defect levels in the band gap of nanocrystals. A large Stokes shift defined by fine exciton structure (bright and dark excitons) is observed. The shift is in the range 140–220 meV for nanocrystals 2.4 and 2.0 nm in radius.

Original languageEnglish
Pages (from-to)576-581
Number of pages6
JournalSemiconductors
Volume51
Issue number5
DOIs
Publication statusPublished - 1 May 2017

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