New ladder-type conjugated polymer with broad absorption, high thermal stability, and low band gap

Journal of Polymer Science Part A: Polymer Chemistry

http://onlinelibrary.wiley.com/doi/10.1002/pola.26234/abstract

A ladder-type π-conjugated polymer PPBBTZ was synthesized through a simple method. PPBBTZ showed good solubility in organic solvents  and high thermal stability (decomposition temperatures up to 323 °C and 299 °C in nitrogen and air, respectively). HOMO and LUMO are −5.46 and −3.81 eV, respectively, with a band gap of 1.65 eV. More interestingly, PPBBTZ displayed broad absorption from ultraviolet to visible light regions (200–750 nm).