Fused Cyclopentadithienothiophene acceptor enables ultrahigh short‐circuit current and high efficiency >11% in as‐cast organic solar cells
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
A new method to synthesize an electron‐rich building block cyclopentadithienothiophene (9H‐thieno‐[3,2‐b]thieno[2″,3″:4′,5′]thieno[2′,3′:3,4]cyclopenta[1,2‐d]thiophene, CDTT) via a facile aromatic extension strategy is reported. By combining CDTT with 1,1‐dicyanomethylene‐3‐indanone endgroups, a promising nonfullerene small molecule acceptor (CDTTIC) is prepared. As‐cast, single‐junction nonfullerene organic solar cells based on PFBDB‐T: CDTTIC blends exhibit very high short‐circuit currents up to 26.2 mA cm−2 in combination with power conversion efficiencies over 11% without any additional processing treatments. The high photocurrent results from the near‐infrared absorption of the CDTTIC acceptor and the well‐intermixed blend morphology of polymer donor PFBDB‐T and CDTTIC. This work demonstrates a useful fused ring extension strategy and promising solar cell results, indicating the great potential of the CDTT derivatives as electron‐rich building blocks for constructing high‐performance small molecule acceptors in organic solar cells.
Date Issued
2019-10-04
Date Acceptance
2019-08-01
Citation
Advanced Functional Materials, 2019, 29 (40), pp.1-7
ISSN
1616-301X
Publisher
Wiley
Start Page
1
End Page
7
Journal / Book Title
Advanced Functional Materials
Volume
29
Issue
40
Copyright Statement
© 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: He, Q., Shahid, M., Wu, J., Jiao, X., Eisner, F. D., Hodsden, T., Fei, Z., Anthopoulos, T. D., McNeill, C. R., Durrant, J. R., Heeney, M., Fused Cyclopentadithienothiophene Acceptor Enables Ultrahigh Short‐Circuit Current and High Efficiency >11% in As‐Cast Organic Solar Cells. Adv. Funct. Mater. 2019, 1904956, which has been published in final form at https://doi.org/10.1002/adfm.201904956
Identifier
https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201904956
Subjects
Materials
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Publication Status
Published
Date Publish Online
2019-08-08