Abstract
We report the synthesis of two new selenophene containing ladder-type monomers, cyclopentadiselenophene (CDS) and indacenodiselenophene (IDSe), via a twofold and fourfold Pd catalyzed coupling with a 1,1-diborylmethane derivative. Co-polymers with benzothiadiazole (BT) were prepared in high yield by Suzuki polymerization to afford co-polymers which exhibited excellent solubility in a range of non-chlorinated solvents. The CDS co-polymer exhibited a band gap of just 1.18 eV, which is amongst the lowest reported for donor-acceptor polymers. Thin-film transistors were fabricated using environmentally benign, non-chlorinated solvents with the CDS and IDSe co-polymers exhibiting hole mobility up to 0.15 and 6.4 cm2 /Vs, respectively. This high performance was achieved without the undesirable peak in mobility often observed at low gate voltages due to parasitic contact resistance.
Original language | English (US) |
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Pages (from-to) | 8552-8561 |
Number of pages | 10 |
Journal | Journal of the American Chemical Society |
Volume | 139 |
Issue number | 25 |
DOIs | |
State | Published - Jun 15 2017 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: We thank the British Council (Grant Number 173601536) and EPSRC (EP/L016702/1) for support. C.R.M. acknowledges support from the Australian Research Council (DP130102616). This research was undertaken in part on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia.