Facile synthesis of 1-(2,6-diisopropylphenyl)-2,5-di(2-thienyl)pyrrole-based narrow band gap small molecules for solar cell applications

- Two new low-band gap organic small molecules were prepared.
- The absorption of the molecules was in the range of 500-800 or 900 nm, in film.
- The optical bad gaps of the molecules were 1.58 eV and 1.42 eV, respectively.
- The energy levels of the molecules were found to be suitable for BHJ solar cells.
- The molecules were applied to small molecule organic solar cell applications.