Effect of Electronic Acceptor Segments on Photophysical Properties of Low-Band-Gap Ambipolar Polymers

Table 3

Fluorescence energies (eV, nm), main configurations, and radiative lifetime of PBDPP, PBTDPP, and PBBTDPP.

	𝐸 (eV/nm)	CI coefficients	Strength (𝑓)	Δ𝐸^a (nm)	𝜏^b
PBDPP	1.8759 (660.93)	(0.69058) H→L	3.1267	94.56	2.0904
PBTDPP	1.7114 (724.45)	(0.56855) H→L	3.7192	96.27	2.1114
PBBTDPP	1.0208 (1214.63)	(0.61494) H→L	2.2405	130.31	9.8515

^aEnergy difference between absorption and emission peaks; ^blifetime (ns).