Abstract
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, Mws 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 × 10 -3 cm2 V-1 s-1.
Original language | English |
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Pages (from-to) | 5283-5290 |
Number of pages | 8 |
Journal | Polymer Chemistry |
Volume | 4 |
Issue number | 20 |
DOIs | |
Publication status | Published - 21 Oct 2013 |
Externally published | Yes |