Abstract
Novel hybrid organic/inorganic nanocomposites made of metal oxide and conjugated polymer nanocomposite and its application in bulk-heterojunction solar cells were studied. The composite was composed of different concentrations of strontium titanate (SrTiO(3)) and polyaniline doped phosphoric acid. The optimum concentration of strontium titanate was found to be 0.2 v/v. An inorganic-organic photovoltaic device with a structure of Ag/Pani-H(3)PO(4)-SrTiO(3)/Al has been fabricated. The ideality factor value of the diode was found to be 1.8. This n value of the diode implies a deviation from ideal junction behaviour. The barrier height phi(b) value for the diode was found to be 0.56 eV. The Ag/Pani-H(3)PO(4)-SrTiO(3)/Al diode shows a photovoltaic behaviour with a maximum open-circuit voltage V(oc) of 2.49 V, and short-circuit current I(sc) of 5.6 mA under light illumination lambda = 460 nm. The conversion efficiency was found to be 5.2%. It is evaluated that the Ag/Pani-H(3)PO(4)-SrTiO(3)/Al diode is a good photodiode with calculated electronic parameters.