Morphology changes upon scaling a high-efficiency, solution-processed solar cell

Handle URI:
http://hdl.handle.net/10754/621563
Title:
Morphology changes upon scaling a high-efficiency, solution-processed solar cell
Authors:
Ro, Hyun Wook; Downing, Jonathan M.; Engmann, Sebastian; Herzing, Andrew A.; DeLongchamp, Dean M.; Richter, Lee J.; Mukherjee, Subhrangsu; Ade, Harald; Abdelsamie, Maged ( 0000-0002-4631-5409 ) ; Jagadamma, Lethy K.; Amassian, Aram ( 0000-0002-5734-1194 ) ; Liu, Yuhang; Yan, He
Abstract:
Solution processing via roll-to-roll (R2R) coating promises a low cost, low thermal budget, sustainable revolution for the production of solar cells. Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′;5′,2′′;5′′,2′′′-quaterthiophen-5,5-diyl)], PffBT4T-2OD, has recently been shown to achieve high power conversion efficiency (>10%) paired with multiple acceptors when thick films are spun-coat from hot solutions. We present detailed morphology studies of PffBT4T-2OD based bulk heterojunction films deposited by the volume manufacturing compatible techniques of blade-coating and slot-die coating. Significant aspects of the film morphology, the average crystal domain orientation and the distribution of the characteristic phase separation length scales, are remarkably different when deposited by the scalable techniques vs. spun-coat. Yet, we find that optimized blade-coated devices achieve PCE > 9.5%, nearly the same as spun-coat. These results challenge some widely accepted propositions regarding what is an optimal BHJ morphology and suggest the hypothesis that diversity in the morphology that supports high performance may be a characteristic of manufacturable systems, those that maintain performance when coated thicker than ≈200 nm. In situ measurements reveal the key differences in the solidification routes for spin- and blade-coating leading to the distinct film structures. © 2016 The Royal Society of Chemistry.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Ro HW, Downing JM, Engmann S, Herzing AA, DeLongchamp DM, et al. (2016) Morphology changes upon scaling a high-efficiency, solution-processed solar cell. Energy Environ Sci 9: 2835–2846. Available: http://dx.doi.org/10.1039/c6ee01623e.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Energy Environ. Sci.
Issue Date:
2-Aug-2016
DOI:
10.1039/c6ee01623e
Type:
Article
ISSN:
1754-5692; 1754-5706
Sponsors:
J. D. acknowledges support of a NIST-NRC postdoctoral fellowship. H. W. R. acknowledges support from the U.S. Department of Commerce, National Institute of Standards and Technology under financial assistance awards 70NANB15H079. X-ray characterization and analysis by NCSU was supported by the U.S. Department of Energy, Office of Science, Basic Energy Science, Division of Materials Science and Engineering under Contract DE-FG02-98ER45737. X-ray data was acquired at beamlines 7.3.3 and 11.0.1.2 at the Advanced Light Source, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. E. Schaible, C. Zhu, A. Hexemer, C. Wang, and A. Young of the ALS (DOE) assisted with the measurements and provided instrument maintenance.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorRo, Hyun Wooken
dc.contributor.authorDowning, Jonathan M.en
dc.contributor.authorEngmann, Sebastianen
dc.contributor.authorHerzing, Andrew A.en
dc.contributor.authorDeLongchamp, Dean M.en
dc.contributor.authorRichter, Lee J.en
dc.contributor.authorMukherjee, Subhrangsuen
dc.contributor.authorAde, Haralden
dc.contributor.authorAbdelsamie, Mageden
dc.contributor.authorJagadamma, Lethy K.en
dc.contributor.authorAmassian, Aramen
dc.contributor.authorLiu, Yuhangen
dc.contributor.authorYan, Heen
dc.date.accessioned2016-11-03T08:32:13Z-
dc.date.available2016-11-03T08:32:13Z-
dc.date.issued2016-08-02en
dc.identifier.citationRo HW, Downing JM, Engmann S, Herzing AA, DeLongchamp DM, et al. (2016) Morphology changes upon scaling a high-efficiency, solution-processed solar cell. Energy Environ Sci 9: 2835–2846. Available: http://dx.doi.org/10.1039/c6ee01623e.en
dc.identifier.issn1754-5692en
dc.identifier.issn1754-5706en
dc.identifier.doi10.1039/c6ee01623een
dc.identifier.urihttp://hdl.handle.net/10754/621563-
dc.description.abstractSolution processing via roll-to-roll (R2R) coating promises a low cost, low thermal budget, sustainable revolution for the production of solar cells. Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′;5′,2′′;5′′,2′′′-quaterthiophen-5,5-diyl)], PffBT4T-2OD, has recently been shown to achieve high power conversion efficiency (>10%) paired with multiple acceptors when thick films are spun-coat from hot solutions. We present detailed morphology studies of PffBT4T-2OD based bulk heterojunction films deposited by the volume manufacturing compatible techniques of blade-coating and slot-die coating. Significant aspects of the film morphology, the average crystal domain orientation and the distribution of the characteristic phase separation length scales, are remarkably different when deposited by the scalable techniques vs. spun-coat. Yet, we find that optimized blade-coated devices achieve PCE > 9.5%, nearly the same as spun-coat. These results challenge some widely accepted propositions regarding what is an optimal BHJ morphology and suggest the hypothesis that diversity in the morphology that supports high performance may be a characteristic of manufacturable systems, those that maintain performance when coated thicker than ≈200 nm. In situ measurements reveal the key differences in the solidification routes for spin- and blade-coating leading to the distinct film structures. © 2016 The Royal Society of Chemistry.en
dc.description.sponsorshipJ. D. acknowledges support of a NIST-NRC postdoctoral fellowship. H. W. R. acknowledges support from the U.S. Department of Commerce, National Institute of Standards and Technology under financial assistance awards 70NANB15H079. X-ray characterization and analysis by NCSU was supported by the U.S. Department of Energy, Office of Science, Basic Energy Science, Division of Materials Science and Engineering under Contract DE-FG02-98ER45737. X-ray data was acquired at beamlines 7.3.3 and 11.0.1.2 at the Advanced Light Source, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. E. Schaible, C. Zhu, A. Hexemer, C. Wang, and A. Young of the ALS (DOE) assisted with the measurements and provided instrument maintenance.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleMorphology changes upon scaling a high-efficiency, solution-processed solar cellen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalEnergy Environ. Sci.en
dc.contributor.institutionMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, United Statesen
dc.contributor.institutionTheiss Research, San Diego, CA, United Statesen
dc.contributor.institutionDepartment of Physics, Organic and Carbon Electronics Laboratory (ORaCEL), North Carolina State University, Raleigh, NC, United Statesen
dc.contributor.institutionDepartment of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kongen
kaust.authorAbdelsamie, Mageden
kaust.authorJagadamma, Lethy K.en
kaust.authorAmassian, Aramen
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