Journal
POLYMER CHEMISTRY
Volume 4, Issue 20, Pages 5283-5290Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3py00129f
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Funding
- NSFC
- State Basic Program
- Chinese Academy of Sciences
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Four new alternating D-A polymers (P1-P4) with (E)-[4,4'-biimidazolylidene]-5,5'(1H, 1'H)-dione (BID) as electron accepting moieties were synthesized and characterized. Based on GPC (gel permeation chromatography) data, M(w)s of P1-P4 are relatively high ranging from 11.8 to 14.7 kg mol(-1) with polydispersities of 1.8-1.9. Thin-films of P1-P4 show broad and strong absorptions up to 950 nm. HOMO (-5.11 eV to -5.32 eV) and LUMO (-3.71 eV to -3.81 eV) energies as well as band gaps (1.40 eV to 1.53 eV) were determined based on their onset redox potentials and absorption spectra. Field-effect transistors with thin-films of P1-P4 were successfully fabricated with conventional techniques. The results reveal that thin-films of P1 and P2 exhibit relatively high hole mobilities of up to 6.6 x 10(-3) cm(2) V-1 s(-1).
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