title: Electronic studies on oligothienylenevinylenes: understanding the nature of their ground and excited electronic states.
abstract: The electronic and molecular structures of a family of oligothienylenevinylenes for organic solar cells are studied by means of UV/Vis, fluorescence and Raman spectroscopy, aided by quantum chemical calculations. By using different anchoring groups, the alteration of the electronic properties upon inserting electron-withdrawing groups into different positions on the oligothienylenevinylene backbone is determined. In addition, a thorough study of the photophysical properties is carried out to understand their potential use in optoelectronic devices. The charge defect of one of these systems is analysed to elucidate the possible charge carriers photogenerated during device operation.
authors.affiliation: Department of Physical Chemistry, University of Málaga, 29071-Málaga, Spain.
authors.forename: Rocío
authors.initials: R
authors.lastname: Ponce Ortiz
authors.forename: Sandra R
authors.initials: SR
authors.lastname: González
authors.forename: Juan
authors.initials: J
authors.lastname: Casado
authors.forename: Juan T
authors.initials: JT
authors.lastname: López Navarrete
authors.forename: David L
authors.initials: DL
authors.lastname: Officer
authors.forename: Pawel
authors.initials: P
authors.lastname: Wagner
authors.forename: John C
authors.initials: JC
authors.lastname: Earles
authors.forename: Keith C
authors.initials: KC
authors.lastname: Gordon