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Article: Temperature-Dependent Aggregation Donor Polymers Enable Highly Efficient Sequentially Processed Organic Photovoltaics Without the Need of Orthogonal Solvents

TitleTemperature-Dependent Aggregation Donor Polymers Enable Highly Efficient Sequentially Processed Organic Photovoltaics Without the Need of Orthogonal Solvents
Authors
Keywordstemperature-dependent aggregation
bulk heterojunction
sequential processing method
organic photovoltaics
nonorthogonal solvents
Issue Date2019
Citation
Advanced Functional Materials, 2019, v. 29, n. 33, article no. 1902478 How to Cite?
Abstract© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The conventional method to prepare bulk-heterojunction organic photovoltaics (OPVs) is a one-step method from the blend solution of donor and acceptor materials, known as blend-casting (BC). Recently, an alternative method was demonstrated to achieve high efficiencies (13%) comparable to state-of-the-art BC devices. This two-step-coating method, known as “sequential processing,” (SqP) involves sequential deposition of the donor and then the acceptor from two orthogonal solvents. However, the requirement of orthogonal solvents to process the donor and acceptor constrains the choice of materials and processing solvents. In this paper, an improved version of SqP method without the need for using orthogonal solvents is reported. The success is based on donor polymers with strong temperature-dependent aggregation properties whose solution can be processed at a high temperature, but the resulting film becomes completely insoluble at room temperature, which allows for the processing of overlying acceptors from a wide range of nonorthogonal solvents. With this approach, efficient SqP OPVs is demonstrated based on a range of donor/acceptor materials and processing solvents, and, in every single case, SqP OPVs can outperform their BC counterparts. The results broaden the solvent choices and open a much larger window to optimize the processing parameters of SqP method.
Persistent Identifierhttp://hdl.handle.net/10722/285838
ISSN
2019 Impact Factor: 16.836
2015 SCImago Journal Rankings: 5.210

 

DC FieldValueLanguage
dc.contributor.authorArunagiri, Lingeswaran-
dc.contributor.authorZhang, Guangye-
dc.contributor.authorHu, Huawei-
dc.contributor.authorYao, Huatong-
dc.contributor.authorZhang, Kai-
dc.contributor.authorLi, Yunke-
dc.contributor.authorChow, Philip C.Y.-
dc.contributor.authorAde, Harald-
dc.contributor.authorYan, He-
dc.date.accessioned2020-08-18T04:56:47Z-
dc.date.available2020-08-18T04:56:47Z-
dc.date.issued2019-
dc.identifier.citationAdvanced Functional Materials, 2019, v. 29, n. 33, article no. 1902478-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10722/285838-
dc.description.abstract© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The conventional method to prepare bulk-heterojunction organic photovoltaics (OPVs) is a one-step method from the blend solution of donor and acceptor materials, known as blend-casting (BC). Recently, an alternative method was demonstrated to achieve high efficiencies (13%) comparable to state-of-the-art BC devices. This two-step-coating method, known as “sequential processing,” (SqP) involves sequential deposition of the donor and then the acceptor from two orthogonal solvents. However, the requirement of orthogonal solvents to process the donor and acceptor constrains the choice of materials and processing solvents. In this paper, an improved version of SqP method without the need for using orthogonal solvents is reported. The success is based on donor polymers with strong temperature-dependent aggregation properties whose solution can be processed at a high temperature, but the resulting film becomes completely insoluble at room temperature, which allows for the processing of overlying acceptors from a wide range of nonorthogonal solvents. With this approach, efficient SqP OPVs is demonstrated based on a range of donor/acceptor materials and processing solvents, and, in every single case, SqP OPVs can outperform their BC counterparts. The results broaden the solvent choices and open a much larger window to optimize the processing parameters of SqP method.-
dc.languageeng-
dc.relation.ispartofAdvanced Functional Materials-
dc.subjecttemperature-dependent aggregation-
dc.subjectbulk heterojunction-
dc.subjectsequential processing method-
dc.subjectorganic photovoltaics-
dc.subjectnonorthogonal solvents-
dc.titleTemperature-Dependent Aggregation Donor Polymers Enable Highly Efficient Sequentially Processed Organic Photovoltaics Without the Need of Orthogonal Solvents-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adfm.201902478-
dc.identifier.scopuseid_2-s2.0-85067394163-
dc.identifier.volume29-
dc.identifier.issue33-
dc.identifier.spagearticle no. 1902478-
dc.identifier.epagearticle no. 1902478-
dc.identifier.eissn1616-3028-

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