fig5
Figure 5. UV-vis absorption spectra of PBED, P(BED-T), P(BED-TT) films by spray-spin coating polymerization method. P(BED-TT) films. BED-T: 2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thiophene; BED-TT: 2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thieno[3,2-b]thiophene.