期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 48, 页码 6051-6058出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201301468
关键词
solar cells; nanocrystals; carrier multiplication; semiconductors
类别
资金
- NEDO project
- FOM (Stichting voor Fundamenteel Onderzoek der Materie)
- NanoNext
- Technology Foundation STW
- Science Foundation Ireland National Access Programme [283]
- JSPS Invitation Fellowship
- JSPS Bridge Fellowship
- University of Ulster Strategic Research Fund
- Leverhulme International Network on Materials processing by atmospheric pressure plasmas for energy applications [IN-2012-136]
- Royal Society International Exchanges scheme [IE120884]
- University of Ulster Vice-Chancellor Studentship
- EPSRC [EP/K022237/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K022237/1] Funding Source: researchfish
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.
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