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Your search keyword '"Dohnalova, Katerina"' showing total 1 results
Start Over Author "Dohnalova, Katerina" Publisher wiley-blackwell
1 results on '"Dohnalova, Katerina"'

1. Dramatic Enhancement of Photoluminescence Quantum Yields for Surface-Engineered Si Nanocrystals within the Solar Spectrum.

Author

Svrcek, Vladimir, Dohnalova, Katerina, Mariotti, Davide, Trinh, Minh Tuan, Limpens, Rens, Mitra, Somak, Gregorkiewicz, Tom, Matsubara, Koiji, and Kondo, Michio

Subjects
*PHOTOLUMINESCENCE, *SURFACES (Technology), *SILICON, *NANOCRYSTALS manufacturing, *SOLAR spectra, *ATMOSPHERIC pressure, *MICROPLASMAS
Abstract

Substantial improvements of the absolute photoluminescence quantum yield (QY) for surfactant-free silicon nanocrystals (Si-ncs) by atmospheric pressure microplasma 3-dimensional surface engineering are reported. The effect of surface characteristics on carrier multiplication mechanisms is explored using transient induced absorption and photoluminescence QY. Surface engineering of Si-ncs is demonstrated to lead to more than 120 times increase in the absolute QY (from 0.1% up to 12%) within an important spectral range of the solar emission (2.3-3 eV). The Si-ncs QY is shown to be stable when Si-ncs are stored in ethanol at ambient conditions for three months. [ABSTRACT FROM AUTHOR]

Published
2014
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