Journal
PLASMONICS
Volume 9, Issue 5, Pages 1015-1023Publisher
SPRINGER
DOI: 10.1007/s11468-014-9709-0
Keywords
Surface plasmons; Silver and tin nanoparticles; Light trapping; a-Si:H
Funding
- EU FP7 Marie Curie Action (FP7-PEOPLE-ITN) through the PROPHET project [264687]
- [PEst-C/CTM/LA0025/2011]
- [PTDC/CTM/099719/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/CTM/099719/2008] Funding Source: FCT
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Silver (Ag) and tin (Sn) nanoparticles (NPs) were deposited by thermal evaporation onto heated glass substrates with a good control of size, shape and surface coverage. This process has the advantage of allowing the fabrication of thin-film solar cells with incorporated NPs without vacuum break, since it does not require chemical processes or post-deposition annealing. The X-ray diffraction, TEM and SEM properties are correlated with optical measurements and amorphous silicon hydrogenated (a-Si:H) films deposited on top of both types of NPs show enhanced absorbance in the near-infrared. The results are interpreted with electromagnetic modelling performed with Mie theory. A broad emission in the near-infrared region is considerably increased after covering the Ag nanoparticles with an a-Si:H layer. Such effect may be of interest for possible down-conversion mechanisms in novel photovoltaic devices.
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