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Article: A study of optical properties enhancement in low-bandgap polymer solar cells with embedded PEDOT:PSS gratings

TitleA study of optical properties enhancement in low-bandgap polymer solar cells with embedded PEDOT:PSS gratings
Authors
KeywordsGrating
Light Absorption Enhancement
Low-Bandgap
Organic Solar Cells
Rigorous Electromagnetic Approach
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/solmat
Citation
Solar Energy Materials And Solar Cells, 2012, v. 99, p. 327-332 How to Cite?
AbstractTypically, most low bandgap materials have low absorption with wavelength at around 500 nm. Besides, the restrictions of active layer thickness of thin film polymer solar cells (PSCs) make the devices reduce to absorb light in long wavelength region (around 700 nm). As absorption would be a joint effect of material band properties and optical structures, well-designed light-trapping strategies for these low-bandgap PSCs will be more useful to further enhance efficiencies. We investigate the change of optical properties and device performances of organic solar cells based on our newly synthesized low-bandgap material with embedded poly-(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) PEDOT:PSS grating in the photoactive bulk heterojunction layer. Our results show that the PEDOT:PSS grating with a period of 320 nm and depth of 40 nm makes the light absorption improved in specific regions of the solar spectrum, especially the weak absorption region of our bulk heterojunction material near 500 nm and the red/near-infrared region at around 700 nm. The incident photon-to-electron conversion efficiency (IPCE) also improves with corresponding enhancement peaks. The physical understanding of the absorption enhancement will be investigated and described through our theoretical study. The power conversion efficiency is improved due to the enhancement of short circuit current. The work demonstrates the absorption enhancement of low bandgap solar cells using appropriate grating structures and provides the physical understanding of the absorption enhancement for improving the performances of organic solar cells. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/155726
ISSN
2015 Impact Factor: 4.732
2015 SCImago Journal Rankings: 1.996
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhu, Xen_US
dc.contributor.authorChoy, WCHen_US
dc.contributor.authorXie, Fen_US
dc.contributor.authorDuan, Cen_US
dc.contributor.authorWang, Cen_US
dc.contributor.authorHe, Wen_US
dc.contributor.authorHuang, Fen_US
dc.contributor.authorCao, Yen_US
dc.date.accessioned2012-08-08T08:35:02Z-
dc.date.available2012-08-08T08:35:02Z-
dc.date.issued2012en_US
dc.identifier.citationSolar Energy Materials And Solar Cells, 2012, v. 99, p. 327-332en_US
dc.identifier.issn0927-0248en_US
dc.identifier.urihttp://hdl.handle.net/10722/155726-
dc.description.abstractTypically, most low bandgap materials have low absorption with wavelength at around 500 nm. Besides, the restrictions of active layer thickness of thin film polymer solar cells (PSCs) make the devices reduce to absorb light in long wavelength region (around 700 nm). As absorption would be a joint effect of material band properties and optical structures, well-designed light-trapping strategies for these low-bandgap PSCs will be more useful to further enhance efficiencies. We investigate the change of optical properties and device performances of organic solar cells based on our newly synthesized low-bandgap material with embedded poly-(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) PEDOT:PSS grating in the photoactive bulk heterojunction layer. Our results show that the PEDOT:PSS grating with a period of 320 nm and depth of 40 nm makes the light absorption improved in specific regions of the solar spectrum, especially the weak absorption region of our bulk heterojunction material near 500 nm and the red/near-infrared region at around 700 nm. The incident photon-to-electron conversion efficiency (IPCE) also improves with corresponding enhancement peaks. The physical understanding of the absorption enhancement will be investigated and described through our theoretical study. The power conversion efficiency is improved due to the enhancement of short circuit current. The work demonstrates the absorption enhancement of low bandgap solar cells using appropriate grating structures and provides the physical understanding of the absorption enhancement for improving the performances of organic solar cells. © 2011 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/solmaten_US
dc.relation.ispartofSolar Energy Materials and Solar Cellsen_US
dc.subjectGratingen_US
dc.subjectLight Absorption Enhancementen_US
dc.subjectLow-Bandgapen_US
dc.subjectOrganic Solar Cellsen_US
dc.subjectRigorous Electromagnetic Approachen_US
dc.titleA study of optical properties enhancement in low-bandgap polymer solar cells with embedded PEDOT:PSS gratingsen_US
dc.typeArticleen_US
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_US
dc.identifier.authorityChoy, WCH=rp00218en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.solmat.2011.12.023en_US
dc.identifier.scopuseid_2-s2.0-84862823236en_US
dc.identifier.hkuros208031-
dc.identifier.hkuros221844-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84856512254&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume99en_US
dc.identifier.spage327en_US
dc.identifier.epage332en_US
dc.identifier.isiWOS:000301167200046-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZhu, X=45961741600en_US
dc.identifier.scopusauthoridChoy, WCH=7006202371en_US
dc.identifier.scopusauthoridXie, F=45961747700en_US
dc.identifier.scopusauthoridDuan, C=27367751100en_US
dc.identifier.scopusauthoridWang, C=37113178400en_US
dc.identifier.scopusauthoridHe, W=54892930400en_US
dc.identifier.scopusauthoridHuang, F=34769983300en_US
dc.identifier.scopusauthoridCao, Y=36042143300en_US
dc.identifier.citeulike10252478-

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