Effect of aggregation on optical and photovoltaic properties of an metallorganic compound

Optical and photovoltaic properties of an metallorganic compound - nickel(II)bis(dithiobenzil) (NBDB) in various states of aggregation (solution, vacuum-deposited film, polymer composite) have been studied. Its absorption spectra are explained by the formation of sandwich aggregates in deposited films, which are absynt in the solution and polymer composites. The study of photovoltage spectra showed that both deposited and composite films are photosensitive at the range of 500-1000 nm, and the quantum efficiency of the photogeneration for the direct excitation of aggregates is greater than that for the excitation of monomer molecules.