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Photovoltaic Blend ...
Photovoltaic Blend Microstructure for High Efficiency Post-Fullerene Solar Cells. To Tilt or Not To Tilt?
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- Wang, Gang (author)
- Northwestern Univ, IL 60208 USA
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- Swick, Steven M. (author)
- Northwestern Univ, IL 60208 USA
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- Matta, Micaela (author)
- Northwestern Univ, IL 60208 USA
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- Mukherjee, Subhrangsu (author)
- NIST, MD 20899 USA
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- Strzalka, Joseph W. (author)
- Argonne Natl Lab, IL 60439 USA
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- Logsdon, Jenna Leigh (author)
- Northwestern Univ, IL 60208 USA
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- Fabiano, Simone, 1985- (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Huang, Wei (author)
- Northwestern Univ, IL 60208 USA
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- Aldrich, Thomas J. (author)
- Northwestern Univ, IL 60208 USA
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- Yang, Tony (author)
- Northwestern Univ, IL 60208 USA
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- Timalsina, Amod (author)
- Northwestern Univ, IL 60208 USA
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- Powers-Riggs, Natalia (author)
- Northwestern Univ, IL 60208 USA
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- Alzola, Joaquin M. (author)
- Northwestern Univ, IL 60208 USA
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- Young, Ryan M. (author)
- Northwestern Univ, IL 60208 USA
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- DeLongchamp, Dean M. (author)
- NIST, MD 20899 USA
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- Wasielewski, Michael R. (author)
- Northwestern Univ, IL 60208 USA
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- Kohlstedt, Kevin L. (author)
- Northwestern Univ, IL 60208 USA
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- Schatz, George C. (author)
- Northwestern Univ, IL 60208 USA
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- Melkonyan, Ferdinand S. (author)
- Northwestern Univ, IL 60208 USA
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- Facchetti, Antonio (author)
- Northwestern Univ, IL 60208 USA; Flexterra Corp, IL 60077 USA
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- Marks, Tobin J. (author)
- Northwestern Univ, IL 60208 USA
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(creator_code:org_t)
- 2019-08-05
- 2019
- English.
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In: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 141:34, s. 13410-13420
- Related links:
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https://www.ncbi.nlm...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Achieving efficient polymer solar cells (PSCs) requires a structurally optimal donor-acceptor heterojunction morphology. Here we report the combined experimental and theoretical characterization of a benzodithiophene-benzo-thiadiazole donor polymer series (PBTZF4-R; R = alkyl substituent) blended with the non-fullerene acceptor ITIC-Th and analyze the effects of substituent dimensions on blend morphology, charge transport, carrier dynamics, and PSC metrics. Varying substituent dimensions has a pronounced effect on the blend morphology with a direct link between domain purity, to some extent domain dimensions, and charge generation and collection. The polymer with the smallest alkyl substituent yields the highest PSC power conversion efficiency (PCE, 11%), reflecting relatively small, high-purity domains and possibly benefiting from "matched" donor polymer-small molecule acceptor orientations. The distinctive morphologies arising from the substituents are investigated using molecular dynamics (MD) simulations which reveal that substituent dimensions dictate a well-defined set of polymer conformations, in turn driving chain aggregation and, ultimately, the various film morphologies and mixing with acceptor small molecules. A straightforward energetic parameter explains the experimental polymer domain morphological trends, hence PCE, and suggests strategies for substituent selection to optimize PSC materials morphologies.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Wang, Gang
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Swick, Steven M.
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Matta, Micaela
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Mukherjee, Subhr ...
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Strzalka, Joseph ...
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Logsdon, Jenna L ...
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show more...
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Fabiano, Simone, ...
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Huang, Wei
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Aldrich, Thomas ...
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Yang, Tony
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Timalsina, Amod
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Powers-Riggs, Na ...
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Alzola, Joaquin ...
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Young, Ryan M.
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DeLongchamp, Dea ...
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Wasielewski, Mic ...
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Kohlstedt, Kevin ...
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Schatz, George C ...
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Melkonyan, Ferdi ...
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Facchetti, Anton ...
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Marks, Tobin J.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Polymer Chemistr ...
- Articles in the publication
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Journal of the A ...
- By the university
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Linköping University