Table 1.
Summary of optoelectronic properties of the polymers and DFT bond angles
| Polymer | IP (eV)a | Eg (eV)b | EA (eV)a | PL max (nm) | PL lifetime (tavga) (ns) | DFT dihedral bond angle (°) |
|---|---|---|---|---|---|---|
| pTA | 5.6 | 2.3 | 3.3 | 550 | 0.75 | 24.4 |
| pTA-Ph | 5.7 | 2.7 | 3.0 | 467 | 2.34 | 48.5 |
| pTA-Th | 5.4 | 2.1 | 3.3 | 563 | 0.56 | 37.9 |
| pTA-BT | 5.9 | 2.1 | 3.8 | 647 | 0.41 | 44.3 |
IP ionisation potential from PESA, EA electron affinity, Eg optical band gap, PL photoluminescence (see S7 for PL lifetimes calculations).
Measurements carried out in:
aEstimated from the EA and Eg.
bThin film on ITO spin-coated from 10 mg ml−1 CHCl3 solution.