Enhanced and Balanced Charge Transport Boosting Ternary Solar Cells Over 17% Efficiency 2020 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 32, no 34, article id 2002344Article in journal (Refereed) Published

Abstract [en]

Ternary architecture is one of the most effective strategies to boost the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, an OSC with a ternary architecture featuring a highly crystalline molecular donor DRTB-T-C4 as a third component to the host binary system consisting of a polymer donor PM6 and a nonfullerene acceptor Y6 is reported. The third component is used to achieve enhanced and balanced charge transport, contributing to an improved fill factor (FF) of 0.813 and yielding an impressive PCE of 17.13%. The heterojunctions are designed using so-called pinning energies to promote exciton separation and reduce recombination loss. In addition, the preferential location of DRTB-T-C4 at the interface between PM6 and Y6 plays an important role in optimizing the morphology of the active layer.

Place, publisher, year, edition, pages

WILEY-V C H VERLAG GMBH , 2020. Vol. 32, no 34, article id 2002344

Keywords [en]

charge transport; efficiency; fill factor; integer charge transfer; ternary solar cells

National Category

Other Electrical Engineering, Electronic Engineering, Information Engineering

Identifiers

URN: urn:nbn:se:liu:diva-168564DOI: 10.1002/adma.202002344ISI: 000549866800001PubMedID: 32686255OAI: oai:DiVA.org:liu-168564DiVA, id: diva2:1461841

Note

Funding Agencies|National Science Foundation of ChinaNational Natural Science Foundation of China [21875067, 11604099, 51811530011, 11774092]; Fundamental Research Funds for the Central Universities, Shanghai Ring-Star [19QA1403100]; Shanghai Science and Technology Innovation Action Plan [19JC1416700]; East China Normal University (ECNU) Multifunctional Platform for Innovation [006]; National Key Research and Development Program of China [2017YFA0206600, 2017YFA0303403]; Swedish Government Strategic Research Area in Materials Science on Advanced Functional Materials at Linkoping University [SFO-Mat-LiU 2009-00971]; STINT grant [CH2017-7163]; Swedish Research CouncilSwedish Research Council [2016-05498]

Available from: 2020-08-27 Created: 2020-08-27 Last updated: 2022-10-24

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Liu, XianjieFahlman, Mats

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Laboratory of Organic ElectronicsFaculty of Science & Engineering

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