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arXiv · 1106.1753

Si nanoparticle interfaces in Si/SiO2 solar cell materials

S. Kilpelainen·Y. -W. Lu·F. Tuomisto·J. Slotte·A. Nylandsted Larsen
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Abstract

Novel solar cell materials consisting of Si nanoparticles embedded in SiO2 layers have been studied using positron annihilation spectroscopy in Doppler broadening mode, and photoluminescence. Two positron-trapping interface states are observed after high temperature annealing at 1100°C. One of the states is attributed to the (SiO2/Si bulk) interface and the other to the interface between the Si nanoparticles and SiO2. A small reduction in positron trapping into these states is observed after annealing the samples in N2 atmosphere with 5% H2. Enhanced photoluminescence is also observed from the samples following this annealing step.

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S. Kilpelainen, Y. -W. Lu, F. Tuomisto, J. Slotte, A. Nylandsted Larsen. 2011-06-09. Si nanoparticle interfaces in Si/SiO2 solar cell materials. https://arxiv.org/abs/1106.1753

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