Table 2 Physicochemical properties of the polymer films

From: Effects of branching position of alkyl side chains on ordering structure and charge transport property in thienothiophenedione- and quinacridone-based semiconducting polymers

Polymer

Ered

(V) a

Eox

(V) a

ELUMO

(eV) b

EHOMO

(eV) b

λmax

(nm) c

Eg

(eV) d

PTTD4T-2DT

−0.97

0.39

−3.83

−5.19

818

1.23

PTTD4T-3DP

−0.98

0.40

−3.82

−5.20

858

1.22

PTTD4T-4DH

−1.04

0.29

−3.76

−5.09

876

1.16

PTTD4T-5DH

−1.01

0.32

−3.79

−5.12

871

1.20

PQA2T-2DT

−1.73

0.20

−3.07

−5.00

456

2.02

PQA2T-3DP

−1.75

0.21

−3.05

−5.01

481

2.01

PQA2T-4DH

−1.82

0.12

−2.98

−4.92

484

2.01

PQA2T-5DH

−1.77

0.08

−3.03

−4.88

483

2.00

  1. Abbreviations: HOMO, highest occupied molecular orbital; LUMO, lowest unoccupied molecular orbital.
  2. aReduction potential (Ered) and oxidation potential (Eox) determined from the onset of the cyclic voltammogram.
  3. bLUMO (ELUMO) and HOMO (EHOMO) energy levels estimated using the following equation: ELUMO=−4.80−eEred, EHOMO=−4.80−eEox.
  4. cAbsorption maximum.
  5. dOptical bandgap estimated from the onset of the absorption spectrum.
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