Coherent light trapping in thin-film photovoltaics

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Thin-film photovoltaic technologies have an enormous potential to reduce the cost of solar electricity. However, because thin photoactive layers are used, optical absorption is incomplete unless light-trapping strategies are employed. Since conventional light-trapping approaches based on geometric scattering are less effective in thin-film cells, coherent light-trapping approaches that exploit the wave nature of light are being explored to enhance optical absorption. In this article, we look at the various strategies for coherent light trapping in thin-film solar cells, including photonic crystals, metal nanostructures, and multilayer stacks. The suitability of a particular strategy depends on factors such as configuration of the solar cell, process compatibility, cost, desired angular response, and materials usage. We also discuss the physical limits of light trapping in thin films.
Publisher
CAMBRIDGE UNIV PRESS
Issue Date
2011-06
Language
English
Article Type
Article
Keywords

SILICON SOLAR-CELLS; OPTICAL-ABSORPTION ENHANCEMENT; PHOTONIC CRYSTAL; INTERMEDIATE REFLECTORS; CONVERSION EFFICIENCY; HARVESTING EFFICIENCY; METAL NANOPARTICLES; TRANSPORT LAYERS; NANOWIRE ARRAYS; DESIGN

Citation

MRS BULLETIN, v.36, no.6, pp.453 - 460

ISSN
0883-7694
URI
http://hdl.handle.net/10203/97649
Appears in Collection
EEW-Journal Papers(저널논문)
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