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- Title
Dramatic Enhancement of Photoluminescence Quantum Yields for Surface-Engineered Si Nanocrystals within the Solar Spectrum.
- Authors
Svrcek, Vladimir; Dohnalova, Katerina; Mariotti, Davide; Trinh, Minh Tuan; Limpens, Rens; Mitra, Somak; Gregorkiewicz, Tom; Matsubara, Koiji; Kondo, Michio
- 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.
- Subjects
PHOTOLUMINESCENCE; SURFACES (Technology); SILICON; NANOCRYSTALS manufacturing; SOLAR spectra; ATMOSPHERIC pressure; MICROPLASMAS
- Publication
Advanced Functional Materials, 2014, Vol 23, Issue 48, p6051
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201301468