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Article: A comprehensively theoretical and experimental study of carrier generation and transport for achieving high performance ternary blend organic solar cells

TitleA comprehensively theoretical and experimental study of carrier generation and transport for achieving high performance ternary blend organic solar cells
Authors
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/22112855
Citation
Nano Energy, 2018, v. 51, p. 206-215 How to Cite?
AbstractTernary blend organic solar cells (OSCs) composed of three components in the active layer shows the potential to achieve higher power conversion efficiency (PCE) as compared to the binary counterpart due to the wider absorption spectrum, higher generation rate, and better morphology. However, the physical understanding of carrier generation and transport processes in the ternary blend OSCs has been limited explored. In the work, together with experimental studies of the two donors, one acceptor ternary blend OSCs with PCE > 12%, we will theoretically and experimentally describe the roles of the carrier generation (including exciton transfer, delocalization and dissociation), and carrier transport (particularly the hole transport) on the performance of ternary blend OSCs. Through theoretical and experimental investigations, critical design rules for improving the device performance are concluded: (1) improving the exciton delocalization ratio via donor ratio optimization with physical understanding, (2) selecting the donors with well overlap of emission and absorption spectra to promote a beneficial exciton transfer, (3) engineering the energy level of donors to form the blocking barrier for reducing hole transfer into the donor with high recombination loss. The work unveils the device physics which is fundamentally important for designing and optimizing high-performance ternary blend OSCs.
Persistent Identifierhttp://hdl.handle.net/10722/259312
ISSN
2019 Impact Factor: 16.602
2015 SCImago Journal Rankings: 4.169
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, ZS-
dc.contributor.authorRen, X-
dc.contributor.authorXu, X-
dc.contributor.authorPeng, Q-
dc.contributor.authorSha, W-
dc.contributor.authorChoy, WCH-
dc.date.accessioned2018-09-03T04:04:59Z-
dc.date.available2018-09-03T04:04:59Z-
dc.date.issued2018-
dc.identifier.citationNano Energy, 2018, v. 51, p. 206-215-
dc.identifier.issn2211-2855-
dc.identifier.urihttp://hdl.handle.net/10722/259312-
dc.description.abstractTernary blend organic solar cells (OSCs) composed of three components in the active layer shows the potential to achieve higher power conversion efficiency (PCE) as compared to the binary counterpart due to the wider absorption spectrum, higher generation rate, and better morphology. However, the physical understanding of carrier generation and transport processes in the ternary blend OSCs has been limited explored. In the work, together with experimental studies of the two donors, one acceptor ternary blend OSCs with PCE > 12%, we will theoretically and experimentally describe the roles of the carrier generation (including exciton transfer, delocalization and dissociation), and carrier transport (particularly the hole transport) on the performance of ternary blend OSCs. Through theoretical and experimental investigations, critical design rules for improving the device performance are concluded: (1) improving the exciton delocalization ratio via donor ratio optimization with physical understanding, (2) selecting the donors with well overlap of emission and absorption spectra to promote a beneficial exciton transfer, (3) engineering the energy level of donors to form the blocking barrier for reducing hole transfer into the donor with high recombination loss. The work unveils the device physics which is fundamentally important for designing and optimizing high-performance ternary blend OSCs.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/22112855-
dc.relation.ispartofNano Energy-
dc.titleA comprehensively theoretical and experimental study of carrier generation and transport for achieving high performance ternary blend organic solar cells-
dc.typeArticle-
dc.identifier.emailSha, W: shawei@hku.hk-
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hk-
dc.identifier.authoritySha, W=rp01605-
dc.identifier.authorityChoy, WCH=rp00218-
dc.identifier.doi10.1016/j.nanoen.2018.06.069-
dc.identifier.hkuros289872-
dc.identifier.hkuros290287-
dc.identifier.volume51-
dc.identifier.spage206-
dc.identifier.epage215-
dc.identifier.isiWOS:000440682100023-
dc.publisher.placeNetherlands-

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