Conductive Polymers Based on Phenothiazine-Benzothiadiazole: Synthesis, Characterization of Photovoltaics

Abstract

Two new π-conjugated polymers (Poly[(N-10’-(octan-3-yl)-phenothiazin-3,7-ylene)-alt- (4’,7’-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PoPTZ-BT-BTD), Poly[(N-10`-(octan-3-yl) -phenothiazin-3,7-ylene)-alt-(4’,7’-bis(thiophen-2-yl)-5,6-bis(octyloxy)benzo[c][1,2,5]thiadiazole)] (PoPTZ-BT-BoBTD) ) were synthesized through the Suzuki coupling reaction for organic photovoltaics (OPVs), and their optical and electrochemical properties were analyzed. Their wavelength of maximun absorption was 526 nm and 506 nm in solution state, repectively, and 560 nm and 522 nm in film state, respectively. Their band-gap energy was 2.01 eV and 2.09 eV in solution state, and 1.82 eV and 1.91 eV in film state, respectively. The results of analysis of the chrateristics of photovoltaics, 0.79 % and 0.99 % of the maximum power conversion efficiencies (PCE), repectively.

Novel Push-Pull Benzodithiophene-Containing Polymers as Hole-Transport Materials for Efficient Perovskite Solar Cells

“…Heating and cooling the DSC curves for polymer P1 showed low-intensity broad flat peaks with a T m of 158.8 °C and 189.7 °C, and T c of 163.9 °C ( Figure S6 ). This implies certain self-organization of polymer P1 in the solid state, that might be attributed to the presence of four linear decyl side chains on thiophene fragments, which enhance non-covalent intermolecular interactions [ 14 ]. The XRD patterns of thin films of polymers P1 – P3 revealed peaks at 2θ = 4–5°, which correspond to the short-range order, while the broad signal in the range of 2θ = 20–25° is typical for interactions via π–π stacking ( Figure S7 ).…”

Electrochemical Copolymerization of Phenothiazine Derivatives for Enhanced Singlet Oxygen Generation in Oxidation of 1,5-dihydroxynaphthalene

“…It is believed that both features are strictly related to the structure of the forming copolymer layer (Scheme 3). 41,50,51 For AC unit, having primary and secondary amines in the structure, it is believed that copolymerization undergoes mainly via amino groups. For AA and TBO, having primary and tertiary amines, both -amino-bridging and direct binding of the phenothiazine's core, are similarly possible.…”