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dc.contributor.authorSong, Xin
dc.contributor.authorGasparini, Nicola
dc.contributor.authorNahid, Masrur Morshed
dc.contributor.authorPaleti, Sri Harish Kumar
dc.contributor.authorWang, Jin-Liang
dc.contributor.authorAde, Harald
dc.contributor.authorBaran, Derya
dc.date.accessioned2019-04-15T11:33:48Z
dc.date.available2019-04-15T11:33:48Z
dc.date.issued2019-02-23
dc.identifier.citationSong X, Gasparini N, Nahid MM, Paleti SHK, Wang J-L, et al. (2019) Dual Sensitizer and Processing-Aid Behavior of Donor Enables Efficient Ternary Organic Solar Cells. Joule 3: 846–857. Available: http://dx.doi.org/10.1016/j.joule.2019.01.009.
dc.identifier.issn2542-4351
dc.identifier.doi10.1016/j.joule.2019.01.009
dc.identifier.urihttp://hdl.handle.net/10754/631873
dc.description.abstractHerein, we report ternary organic solar cells with a power conversion efficiency (PCE) of 14.0%. By incorporating 10 wt % of BIT-4F-T in the PTB7-Th:IEICO-4F blend, we obtain an enhancement of all photovoltaic parameters compared to the binary devices, leading to a 15% performance improvement in ternary blend. The high photocurrent in 10% BIT-4F-T blend results from a complementary absorption profile of donor components and a hole transfer from BIT-4F-T to PTB7-Th. Morphological and device characterizations reveal that the addition of 10% BIT-4F-T acts not only as a sensitizer but also as a solid processing aid, which is beneficial for charge generation and transport. The effect of the third component is observed in different non-fullerene and fullerene OSCs. Our study demonstrates that careful selection of a third component, where dual sensitizing and processing-aid effects are observed, can be a design strategy to achieve a concomitant improvement in all photovoltaic parameters. The organic photovoltaics (OPV) landscape is nowadays facing a new era, ferried by the development of novel and stable acceptor materials, the so-called non-fullerene acceptors (NFAs), making the 15% power conversion efficiency (PCE) threshold no longer a research dream but a real goal. Despite the priority of high efficiency, the device longevity as well as the large area fabrication need to be addressed to make competitive organic solar cells with the other thin-film photovoltaic technologies. An elegant approach to overcome these limitations is the concept of ternary blend organic solar cells: three (or more) organic materials are combined from one hand to simultaneously enhance all photovoltaic parameters, which in turn will increase the power output of the solar cell. On the other hand, ternary blends have the potential to improve the device stability under light, thermal, and shelf-life conditions compared to traditional donor:acceptor blends. Here, we show ternary organic solar cells with a power conversion efficiency of 14%. By a careful selection of a third component (BIT-4F-T), we obtain an enhancement of all photovoltaic parameters compared to the binary devices (PTB7-Th:IEICO-4F). This is because of a dual effect of the third component acting not only as sensitizer but also as a solid processing aid, which is beneficial for charge generation and transport.
dc.description.sponsorshipD.B. acknowledges KAUST and KAUST Solar Center for continuous support. GIWAXS measurements and analysis by M.M.N. and H.A. are supported by ONR grant N00141512322 and KAUST's Center Partnership Fund (No. 3321). X-ray data were acquired at beamline 7.3.3 at the Advanced Light Source (ALS) in Berkeley National Lab, which is supported by the U.S. Department of Energy (DE-AC02-05CH11231). Z. Peng, S. Stuard, and I. Angunawela assisted with part of the GIWAXS data acquisition. C. Wang, C. Zhu, A.L.D. Kilcoyne, and E. Schaible are acknowledged for beamline support. J.-L.W. was supported by the Natural Science Foundation of China (No. 21472012) and Thousand Youth Talents Plan of China.
dc.publisherElsevier BV
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S2542435119300388
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Joule. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Joule, [3, 3, (2019-02-23)] DOI: 10.1016/j.joule.2019.01.009 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectcharge transfer
dc.subjecthigh efficiency
dc.subjecthigh Jsc
dc.subjectlow recombination
dc.subjectsensitizer
dc.subjectstability
dc.subjectternary solar cell
dc.titleDual Sensitizer and Processing-Aid Behavior of Donor Enables Efficient Ternary Organic Solar Cells
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJoule
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Physics, Organic and Carbon Electronics Lab (ORaCEL), North Carolina State University, Raleigh, NC, 27695, , United States
dc.contributor.institutionBeijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, , , China
kaust.personSong, Xin
kaust.personGasparini, Nicola
kaust.personPaleti, Sri Harish Kumar
kaust.personBaran, Derya
kaust.grant.number3321
dc.date.published-online2019-02-23
dc.date.published-print2019-03


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