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Broadband light absorption enhancement in polymer photovoltaics using metal nanowall gratings as transparent electrodes

TitleBroadband light absorption enhancement in polymer photovoltaics using metal nanowall gratings as transparent electrodes
Publication TypeJournal Article
Year of Publication2012
AuthorsYe Z, Chaudhary S, Kuang P, Ho KM
Journal TitleOptics Express
Volume20
Pages12213-12221
Date Published05
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberWOS:000304403100068
Keywordsblends, films, NETWORK, organic solar-cells
Abstract

The authors investigate light absorption in organic solar cells in which indium tin oxide (ITO) is replaced by a new metallic architecture (grating) as a transparent electrode. Different from typical metal nanowire gratings, our gratings consist of metal nanowalls with nanoscale footprint and (sub) microscale height [Adv. Mater. 23, 2469 (2011)], thus ensuring high optical transmittance and electrical conductivity. Simulations reveal that a broadband and polarization-insensitive light absorption enhancement is achieved via two mechanisms, when such silver nanowall gratings are employed in P3HT:PCBM based solar cells. Overall absorption enhanced by similar to 23% compared to a reference cell with ITO electrode. (C) 2012 Optical Society of America
URL<Go to ISI>://WOS:000304403100068
DOI10.1364/OE.20.012213
Alternate JournalOpt. Express