title: Organoboron polymers for photovoltaic bulk heterojunctions.
abstract: We report on the application of three-coordinate organoboron polymers, inherently strong electron acceptors, in flexible photovoltaic (PV) cells. Poly[(1,4-divinylenephenylene)(2,4,6-triisopropylphenylborane)] (PDB) has been blended with poly(3-hexylthiophene-2,5-diyl) (P3HT) to form a thin film bulk heterojunction (BHJ) on PET/ITO substrates. Morphology may be modulated to give a high percentage of domains (10-20 nm in size) allowing exciton separation. The photoelectric properties of the BHJs in devices with aluminium back electrodes were imaged by light beam induced current (LBIC) and light beam induced voltage (LBIV) techniques. Open circuit voltages, short circuit currents and overall external quantum efficiencies obtained are among the highest reported for all-polymer PV cells.
authors.affiliation: Dipartimento di Chimica Fisica "F. Accascina", Università degli Studi di Palermo, V.le delle Scienze, Ed. 17, Parco D'Orleans II, 90128 Palermo, Italy.
authors.forename: Sebastiano
authors.initials: S
authors.lastname: Cataldo
authors.forename: Simone
authors.initials: S
authors.lastname: Fabiano
authors.forename: Francesco
authors.initials: F
authors.lastname: Ferrante
authors.forename: Francesco
authors.initials: F
authors.lastname: Previti
authors.forename: Salvatore
authors.initials: S
authors.lastname: Patanè
authors.forename: Bruno
authors.initials: B
authors.lastname: Pignataro