Origin of the High Donor Acceptor Composition Tolerance in Device Performance and Mechanical Robustness of All-Polymer Solar Cells

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dc.contributor.authorLee, Jin-Wooko
dc.contributor.authorMa, Boo Sooko
dc.contributor.authorChoi, Joonhyeongko
dc.contributor.authorLee, Junbokko
dc.contributor.authorLee, Seungjinko
dc.contributor.authorLiao, Kinko
dc.contributor.authorLee, Wonhoko
dc.contributor.authorKim, Taek-Sooko
dc.contributor.authorKim, Bumjoon J.ko
dc.date.accessioned2020-02-05T06:20:30Z-
dc.date.available2020-02-05T06:20:30Z-
dc.date.created2020-02-04-
dc.date.created2020-02-04-
dc.date.created2020-02-04-
dc.date.created2020-02-04-
dc.date.created2020-02-04-
dc.date.issued2020-01-
dc.identifier.citationCHEMISTRY OF MATERIALS, v.32, no.1, pp.582 - 594-
dc.identifier.issn0897-4756-
dc.identifier.urihttp://hdl.handle.net/10203/272090-
dc.description.abstractHigh tolerance regarding photovoltaic performance in terms of donor:acceptor (D:A) composition ratio is reported for all-polymer solar cells (all-PSCs), which is a crucial advantage in producing large-scale devices with high reproducibility. To understand the origin of high D:A ratio tolerance in all-PSCs, we investigate the molecular weight (MW) effects of the P(NDI2OD-T2) polymer acceptor (PA) on photovoltaic and mechanical robustness of PBDB-T:P(NDI2OD-T2) all-PSCs. Also, we compare the all-PSCs with other types of PSCs consisting of the same polymer donor but using small molecule acceptors (SMAs) including ITIC and PC71BM. We observe that the D:A ratio tolerances of both the photovoltaic and mechanical properties are highly dependent on the P-A MW and the acceptor material types. For example, at a high D:A ratio of 15:1, all-PSCs using high MW P-A (number-average molecular weight (M-n) = 97 kg mol(-1)) exhibit 13 times higher normalized power conversion efficiency (PCE) than all-PSCs using low MW P-A (M-n = 11 kg mol(-1)), and 20 times higher than ITIC-based PSCs. In addition, the electron mobilities in all-PSCs based on high MW PA are well-maintained even at very high D:A ratio, whereas the electron mobilities in low MW P-A all-PSCs and SMA-based PSCs decrease by 3- and 4-orders of magnitude, respectively, when the D:A ratio increases from 1:1 to 15:1. Thus, we suggest that the formation of tie molecules and chain entanglements by long polymer chains bridging adjacent crystalline domains is the main origin of excellent D:A tolerance in both mechanical robustness and photovoltaic performance. This work provides an important material design guideline for the reproducible production of flexible and stretchable all-PSCs.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleOrigin of the High Donor Acceptor Composition Tolerance in Device Performance and Mechanical Robustness of All-Polymer Solar Cells-
dc.typeArticle-
dc.identifier.wosid000507721600059-
dc.identifier.scopusid2-s2.0-85078296008-
dc.type.rimsART-
dc.citation.volume32-
dc.citation.issue1-
dc.citation.beginningpage582-
dc.citation.endingpage594-
dc.citation.publicationnameCHEMISTRY OF MATERIALS-
dc.identifier.doi10.1021/acs.chemmater.9b04464-
dc.contributor.localauthorKim, Taek-Soo-
dc.contributor.localauthorKim, Bumjoon J.-
dc.contributor.nonIdAuthorLee, Junbok-
dc.contributor.nonIdAuthorLiao, Kin-
dc.contributor.nonIdAuthorLee, Wonho-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusPOWER CONVERSION EFFICIENCY-
dc.subject.keywordPlusMOLECULAR-WEIGHT-
dc.subject.keywordPlusPHOTOVOLTAIC PERFORMANCE-
dc.subject.keywordPlusFULLERENE-POLYMER-
dc.subject.keywordPlusCHARGE-TRANSPORT-
dc.subject.keywordPlusMORPHOLOGY-
dc.subject.keywordPlusAGGREGATION-
dc.subject.keywordPlusSTABILITY-
dc.subject.keywordPlusBEHAVIOR-
dc.subject.keywordPlusADDUCTS-
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