Electronic excitation transfer from an organic matrix to CdS nanocrystals produced by the Langmuir–Blodgett method
- Authors: Zarubanov A.A.1, Plyusnin V.F.2,3, Zhuravlev K.S.1,3
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Affiliations:
- Institute of Semiconductor Physics, Siberian Branch
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch
- Novosibirsk State University
- Issue: Vol 51, No 5 (2017)
- Pages: 576-581
- Section: Spectroscopy, Interaction with Radiation
- URL: https://journals.rcsi.science/1063-7826/article/view/199840
- DOI: https://doi.org/10.1134/S1063782617050268
- ID: 199840
Cite item
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.
About the authors
A. A. Zarubanov
Institute of Semiconductor Physics, Siberian Branch
Author for correspondence.
Email: alexsundr@mail.ru
Russian Federation, Novosibirsk, 630090
V. F. Plyusnin
Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch; Novosibirsk State University
Email: alexsundr@mail.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
K. S. Zhuravlev
Institute of Semiconductor Physics, Siberian Branch; Novosibirsk State University
Email: alexsundr@mail.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090