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Nano-photonic organic solar cell architecture for advanced light management utilizing dual photonic crystals

TitleNano-photonic organic solar cell architecture for advanced light management utilizing dual photonic crystals
Publication TypeBook Chapter
Year of Publication2015
AuthorsPeer, A, Biswas, R
EditorKafafi, ZH, Lane, PA, Samuel, IDW
Book TitleOrganic Photovoltaics XVI
Series TitleProceedings of SPIE
Volume9567
Pagination95670h
PublisherSpie-Int Soc Optical Engineering
CityBellingham
ISBN Number978-1-62841-733-3
Accession NumberWOS:000365813100008
Keywordsabsorption, diffraction, efficiency, Light trapping, limit, organic solar cell, photovoltaics, surface plasmons
Abstract

Organic solar cells have rapidly increasing efficiencies, but typically absorb less than half of the incident solar spectrum. To increase broadband light absorption, we rigorously design experimentally realizable solar cell architectures based on dual photonic crystals. Our optimized architecture consists of a polymer microlens at the air-glass interface, coupled with a photonic-plasmonic crystal at the metal cathode. The microlens focuses light on the periodic nanostructure that generates strong light diffraction. Waveguiding modes and surface plasmon modes together enhance long wavelength absorption in P3HT-PCBM. The architecture has a period of 500 nm, with absorption and photocurrent enhancement of 49% and 58%, respectively.

DOI10.1117/12.2188783
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Photonics