Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4810970
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Funding
- Netherlands Organization for Fundamental Research (NWO)
- European Research Council
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We present a nano-patterned dielectric coating for crystalline Si solar cells that combines excellent anti-reflection and passivation properties. The nano-patterned coating comprises an array of TiO2 nanocylinders placed on top of an ultra-thin Al2O3 layer on a flat Si(100) wafer. The antireflection effect stems from the preferential forward scattering of light through leaky Mie resonances in the TiO2 nanocylinders. The Al2O3 layer provides excellent passivation of the Si surface. We experimentally demonstrate ultralow surface recombination with carrier lifetimes above 4 ms, combined with a reflectivity of 2.8% averaged over a broad spectral range. (C) 2013 AIP Publishing LLC.
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