π-Bridge-Independent 2-(Benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile-Substituted Nonfullerene Acceptors for Efficient Solar Cells
Name:
acs2Echemmater2E6b00131.pdf
Size:
2.393Mb
Format:
PDF
Description:
Accepted Manuscript
Type
ArticleAuthors
Wang, KaiFirdaus, Yuliar

Babics, Maxime

Cruciani, Federico

Saleem, Qasim
El Labban, Abdulrahman

Alamoudi, Maha A

Marszalek, Tomasz
Pisula, Wojciech
Laquai, Frédéric

Beaujuge, Pierre

KAUST Department
Chemical Science ProgramKAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
CRG_R2_13_BEAU_KAUST_1Date
2016-03-28Online Publication Date
2016-03-28Print Publication Date
2016-04-12Permanent link to this record
http://hdl.handle.net/10754/600521
Metadata
Show full item recordAbstract
Molecular acceptors are promising alternatives to fullerenes (e.g. PC61/71BM) in the fabrication of high-efficiency bulk-heterojunction (BHJ) solar cells. While solution-processed polymer-fullerene BHJ devices have recently met the 10% efficiency threshold, molecular acceptors have yet to prove comparably efficient with polymer donors. At this point in time, it is important to forge a better understanding of the design parameters that directly impact small-molecule (SM) acceptor performance in BHJ solar cells. In this report, we show that 2-(benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile (BM)-terminated SM acceptors can achieve efficiencies as high as 5.3% in BHJ solar cells with the polymer donor PCE10. Through systematic device optimization and characterization studies, we find that the nonfull-erene analogues (FBM, CBM and CDTBM) all perform comparably well, independent of the molecular structure and electronics of the π-bridge that links the two electron-deficient BM end groups. With estimated electron affinities within range of those of common fullerenes (4.0-4.3 eV), and a wider range of ionization potentials (6.2-5.6 eV), the SM acceptors absorb in the visible spectrum and effectively contribute to the BHJ device photocurrent. BM-substituted SM acceptors are promising alterna-tives to fullerenes in solution-processed BHJ solar cells.Citation
π-Bridge-Independent 2-(Benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile-Substituted Nonfullerene Acceptors for Efficient Solar Cells 2016 Chemistry of MaterialsSponsors
This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No.CRG_R2_13_BEAU_KAUST_1. The authors acknowledge concurrent support under Baseline Research Funding from KAUST. The authors thank KAUST ACL for technical support in the mass spectrometry analyses. W.P. and T.M. gratefully acknowledge the staff of beamline 9 at the DELTA electron storage ring in Dortmund for providing beamtime and technical support for the GIWAXS measurements. W.P. and T.M. thank Marcelina Rojek for technical support in the GIWAXS measurements.Publisher
American Chemical Society (ACS)Journal
Chemistry of MaterialsAdditional Links
http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b00131ae974a485f413a2113503eed53cd6c53
10.1021/acs.chemmater.6b00131