Unraveling the Unconventional Order of a High-Mobility Indacenodithiophene–Benzothiadiazole Copolymer
Tassone, Christopher J.
Toney, Michael F.
Chabinyc, Michael L
Takacs, Christopher J.
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Chemical Science Program
KAUST Solar Center (KSC)
Preprint Posting Date2021-04-28
Embargo End Date2022-10-05
Permanent link to this recordhttp://hdl.handle.net/10754/669055
MetadataShow full item record
AbstractA new class of donor–acceptor (D–A) copolymers found to produce high charge carrier mobilities competitive with amorphous silicon (>1 cm2 V–1 s–1) exhibit the puzzling microstructure of substantial local order, however lacking long-range order and crystallinity previously deemed necessary for achieving high mobility. Here, we demonstrate the application of low-dose transmission electron microscopy to image and quantify the nanoscale and mesoscale organization of an archetypal D–A copolymer across areas comparable to electronic devices (≈9 μm2). The local structure is spatially resolved by mapping the backbone (001) spacing reflection, revealing nanocrystallites of aligned polymer chains throughout nearly the entire film. Analysis of the nanoscale structure of its ordered domains suggests significant short- and medium-range order and preferential grain boundary orientations. Moreover, we provide insights into the rich, interconnected mesoscale organization of this new family of D–A copolymers by analysis of the local orientational spatial autocorrelations.
CitationCendra, C., Balhorn, L., Zhang, W., O’Hara, K., Bruening, K., Tassone, C. J., … Takacs, C. J. (2021). Unraveling the Unconventional Order of a High-Mobility Indacenodithiophene–Benzothiadiazole Copolymer. ACS Macro Letters, 1306–1314. doi:10.1021/acsmacrolett.1c00547
SponsorsWe thank Dr. Elizabeth Montabana, Dr. David Buschnell, and Dr. Dong-Hua Chen for technical assistance with the Tecnai F20 transmission electron microscope. We also thank Dr. Sébastien Boutet at the Linac Coherent Light Source (LCLS) for FEL beamline assistance. Work by C.C. and L.B. on image analysis was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award DE-SC0020046. C.C. and A.S. also gratefully acknowledge financial support from the National Science Foundation Award # DMR 1808401. C.J.T., K.O., and M.L.C. also acknowledge financial support from the National Science Foundation Award # DMR 1436263. We also gratefully acknowledge the support of NVIDIA Corporation with the donation of the Titan V GPU used for this research. Some of this work was performed at the Stanford-SLAC Cryo-EM Facilities, supported by Stanford University, SLAC, and the National Institutes of Health S10 Instrumentation Programs. Measurements at Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, were supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Use of the Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.
PublisherAmerican Chemical Society (ACS)
JournalACS Macro Letters