Table 1.

Optical and electrochemical properties of the f‐BTI2‐based polymer semiconductors

Polymer	M n [kDa]	Đ	λ max soln a) [nm]	λ max film b) [nm]	λ onset film [nm]	E g opt c) [eV]	E LUMO d) [eV]	E HOMO e) [eV]
PO8	11.7	1.6	560	579	693	1.79	−3.78	−5.56
PO12	23.8	1.9	617	641	699	1.77	−3.81	−5.57
PO16	33.1	2.1	617	641	699	1.77	−3.82	−5.59

^a) Absorption of polymer solution (10⁻⁵ M in chloroform)

^b) Absorption of as‐cast polymer film from chloroform solution

^c) Optical bandgap (E _g ^opt) derived from absorption onset of polymer film using the equation: E _g ^opt = 1240/λ _onset ^film (eV)

^d) E _LUMO = −(E _red ^onset + 4.80) eV, E _red ^onset determined using the Fc/Fc⁺ external standard

^e) E _HOMO = E _LUMO − E _g ^opt.