DataVXACS Energy LettersPaper
journal article·2017-10-13Open access

Enhanced Fill Factor through Chalcogen Side-Chain Manipulation in Small-Molecule Photovoltaics

Thomas J. Aldrich, Matthew J. Leonardi, Alexander S. Dudnik, Nicholas D. Eastham, Boris Harutyunyan, Thomas J. Fauvell, Eric F. Manley, Nanjia Zhou, Melanie R. Butler, Tobias Harschneck, Mark A. Ratner, Lin X. Chen, Michael J. Bedzyk, Robert P. H. Chang, Ferdinand S. Melkonyan, Antonio Facchetti, Tobin J. Marks

ACS Energy Letters· Volume 2· Issue 10
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Source abstract

Abstract

The fill factor (FF) of organic photovoltaic (OPV) devices has proven difficult to optimize by synthetic modification of the active layer materials. In this contribution, a series of small-molecule donors (SMDs) incorporating chalcogen atoms of increasing atomic number ( Z ), namely oxygen, sulfur, and selenium, into the side chains are synthesized and the relationship between the chalcogen Z and the FF of OPV devices is characterized. Larger Z chalcogen atoms are found to consistently enhance FF in bulk-heterojunction OPVs containing PC 61 BM as the acceptor material. A significant ∼8% FF increase is obtained on moving from O to S to Se across three series of SMDs. The FF enhancement is found to result from the combination of more ordered morphology and decreased charge recombination in blend films for the high- Z -chalcogen SMDs. Because this FF enhancement is found within three series of SMDs, the overall strategy is promising for new SMD materials design.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Semiconductor materials and interfaces

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208, United States

Department of Physics and Astronomy and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208, United States

Chemical Science and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States

Department of Materials Science and Engineering and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208, United States

Flexterra Corporation, 8045 Lamon Avenue, Skokie, Illinois 60077, United States

Funding

U.S. Department of Commerce · Air Force Office of Scientific Research · U.S. Department of Energy · National Science Foundation · Qatar National Priorities Research Program

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