Heteroleptic neutral Ru(II) complexes based photodiodes

Abstract The two complexes Ru ( II ) containing 2,6-bis(benzimidazol-2-yl)pyridine and 2-pyridine and 2-quinoline carboxylates were synthesized to fabricate organic photodiodes. The electrical properties of Au / Ru ( II ) complex ( I ) / n − Si / Al and Au / Ru ( II ) complex ( II ) / n − Si / Al diodes were investigated by current-voltage and capacitance-voltage measurements. The fabricated devices give a high rectification behavior with rectification ratio of 2.4 × 10 4 −2.1 × 10 3 at ± 4 V. The diodes exhibited a high photoconductivity based on trap levels within band gap. The series resistance and barrier height were calculated from ( C − V ) measurements and compared to other of ( I − V ) . The obtained results indicate that the prepared photodiodes can be used as photosensor for optoelectronic applications.