H2N2V1, Main, Exploration, bibRecord, 002149

Optical and photoredox properties of small colloidal semiconductor particles in the presence of trivalent lanthanide ions

Identifieur interne : 002149 ( Main/Exploration ); précédent : 002148; suivant : 002150

Optical and photoredox properties of small colloidal semiconductor particles in the presence of trivalent lanthanide ions

Auteurs : Y. F. Lee [États-Unis] ; M. Olshavsky [États-Unis] ; J. Chrysochoos [États-Unis]

Source :

Journal of The Less-Common Metals [ 0022-5088 ] ; 1989.

RBID : ISTEX:AA2AC5939278143DFE2799C6AFB4E9FB1EB9426D

English descriptors

Teeft :
- Absorption spectrum, Anion, Anion vacancies, Bandgap, Bandgap energy, Brus, Chem, Conduction, Conduction band, Deaerated, Electron microscopy, Electron transfer, Electron transfer process, Emission spectra, Emission spectrum, Fojtik, Henglein, Initial slopes, Lanthanide, Lett, Lop4, Luminescence, Optical properties, Particle size, Particle size decreases, Photoredox activity, Phys, Quenching, Quenching efficiency increases, Recombination, Recombination luminescence, Redox, Rossetti, Semiconductor, Semiconductor particle, Semiconductor particles, Small semiconductor particles, Typical plots, Valence band, Weller.

Abstract

Abstract: Size quantization effects upon the optical properties of small size semi-conductor particles (d < 50 Å) have been documented in several systems. As the particle size decreases the band gap energy increases accompanied by a blue-shifted emission, and consequently the photoredox activity should increase. We are studying the correlation between the recombination luminescence of CdS particles and the redox potential of the conduction band probed in terms of oxidative luminescence quenching via electron transfer to Ln3+Ln2+ and Ln3+Ln redox couples associated with different redox potentials. The electron transfer process from the conduction band of small CdS particles to electron acceptors (ΔG°el.tr < 0) is size dependent.

Url:

https://api.istex.fr/ark:/67375/6H6-P0DC3GWV-B/fulltext.pdf

DOI: 10.1016/0022-5088(89)90038-6

Affiliations:

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Le document en format XML

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<term>Chem</term>
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<term>Deaerated</term>
<term>Electron microscopy</term>
<term>Electron transfer</term>
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<front><div type="abstract" xml:lang="en">Abstract: Size quantization effects upon the optical properties of small size semi-conductor particles (d < 50 Å) have been documented in several systems. As the particle size decreases the band gap energy increases accompanied by a blue-shifted emission, and consequently the photoredox activity should increase. We are studying the correlation between the recombination luminescence of CdS particles and the redox potential of the conduction band probed in terms of oxidative luminescence quenching via electron transfer to Ln3+Ln2+ and Ln3+Ln redox couples associated with different redox potentials. The electron transfer process from the conduction band of small CdS particles to electron acceptors (ΔG°el.tr < 0) is size dependent.</div>
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Optical and photoredox properties of small colloidal semiconductor particles in the presence of trivalent lanthanide ions

Optical and photoredox properties of small colloidal semiconductor particles in the presence of trivalent lanthanide ions

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri