Cataldo Sebastiano, Fabiano Simone, Ferrante Francesco, Previti Francesco, Patanè Salvatore, Pignataro Bruno
Dipartimento di Chimica Fisica "F. Accascina", Università degli Studi di Palermo, V.le delle Scienze, Ed. 17, Parco D'Orleans II, 90128 Palermo, Italy.
Macromol Rapid Commun. 2010 Jul 15;31(14):1281-6. doi: 10.1002/marc.201000057. Epub 2010 May 17.
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.
