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Article: Light harvesting improvement of organic solar cells with self-enhanced active layer designs

TitleLight harvesting improvement of organic solar cells with self-enhanced active layer designs
Authors
KeywordsAbsorption enhancement
Active Layer
Efficient scattering matrix method
Electrical performance
Gradient type
Issue Date2012
PublisherOptical Society of America. The Journal's web site is located at http://www.opticsexpress.org
Citation
Optics Express, 2012, v. 20 n. 7, p. 8175-8185 How to Cite?
Abstract
We present designs of organic solar cells (OSCs) incorporating periodically arranged gradient type active layer. The designs can enhance light harvesting with patterned organic materials themselves (i.e. selfenhanced active layer design) to avoid degrading electrical performances of OSCs in contrast to introducing inorganic concentrators into OSC active layers such as silicon and metallic nanostructures. Geometry of the OSC is fully optimized by rigorously solving Maxwell's equations with fast and efficient scattering matrix method. Optical absorption is accessed by a volume integral of the active layer excluding the metallic absorption. Our numerical results show that the OSC with a self-enhanced active layer, compared with the conventional planar active layer configuration, has broadband and wide-angle range absorption enhancement due to better geometric impedance matching and prolonged optical path. This work provides a theoretical foundation and engineering reference for high performance OSC designs. © 2012 Optical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/146864
ISSN
2013 Impact Factor: 3.525
2013 SCImago Journal Rankings: 2.668
ISI Accession Number ID
References

 

Author Affiliations
  1. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorChen, Len_HK
dc.contributor.authorSha, WEIen_HK
dc.contributor.authorChoy, WCHen_HK
dc.date.accessioned2012-05-23T05:43:16Z-
dc.date.available2012-05-23T05:43:16Z-
dc.date.issued2012en_HK
dc.identifier.citationOptics Express, 2012, v. 20 n. 7, p. 8175-8185en_HK
dc.identifier.issn1094-4087en_HK
dc.identifier.urihttp://hdl.handle.net/10722/146864-
dc.description.abstractWe present designs of organic solar cells (OSCs) incorporating periodically arranged gradient type active layer. The designs can enhance light harvesting with patterned organic materials themselves (i.e. selfenhanced active layer design) to avoid degrading electrical performances of OSCs in contrast to introducing inorganic concentrators into OSC active layers such as silicon and metallic nanostructures. Geometry of the OSC is fully optimized by rigorously solving Maxwell's equations with fast and efficient scattering matrix method. Optical absorption is accessed by a volume integral of the active layer excluding the metallic absorption. Our numerical results show that the OSC with a self-enhanced active layer, compared with the conventional planar active layer configuration, has broadband and wide-angle range absorption enhancement due to better geometric impedance matching and prolonged optical path. This work provides a theoretical foundation and engineering reference for high performance OSC designs. © 2012 Optical Society of America.en_HK
dc.languageengen_US
dc.publisherOptical Society of America. The Journal's web site is located at http://www.opticsexpress.orgen_HK
dc.relation.ispartofOptics Expressen_HK
dc.rightsOptics Express. Copyright © Optical Society of America.-
dc.rightsThis paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-7-8175. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAbsorption enhancement-
dc.subjectActive Layer-
dc.subjectEfficient scattering matrix method-
dc.subjectElectrical performance-
dc.subjectGradient type-
dc.titleLight harvesting improvement of organic solar cells with self-enhanced active layer designsen_HK
dc.typeArticleen_HK
dc.identifier.emailSha, WEI:shawei@hku.hken_HK
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_HK
dc.identifier.authoritySha, WEI=rp01605en_HK
dc.identifier.authorityChoy, WCH=rp00218en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1364/OE.20.008175en_HK
dc.identifier.pmid22453487-
dc.identifier.scopuseid_2-s2.0-84859417873en_HK
dc.identifier.hkuros199649en_US
dc.identifier.hkuros221845-
dc.identifier.hkuros221846-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84859417873&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue7en_HK
dc.identifier.spage8175en_HK
dc.identifier.epage8185en_HK
dc.identifier.isiWOS:000302138800126-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChen, L=55175738800en_HK
dc.identifier.scopusauthoridSha, WEI=34267903200en_HK
dc.identifier.scopusauthoridChoy, WCH=7006202371en_HK

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