Solution-processed copper phthalocyanine–gold nanoparticle hybrid nanocomposite thin films

• Optical and electrical properties of CuPc film are enhanced upon loading of Au NPs.
• Upon loading of Au NPs in CuPc the surface morphology changes from sheets to fibers.
• The systematic enhancement in current is observed by increasing Au NPs in CuPc film.
• The XRD peak intensity of CuPc reduced with an increase in the concentration of Au NPs.

Copper phthalocyanine (CuPc) thin film and gold nanoparticles (Au NPs) of size ~ 20 nm were deposited on conducting indium tin oxide coated glass substrates. Thin films were ~ 500 nm thick having crystalline nature determined by surface profilometer and X-ray diffraction technique. The concentration of Au NPs in the films was varied whereas the concentration of CuPc was constant. It was observed that surface morphology varied with Au NP concentration increase in the films accompanied by changes in the optical spectra over 300-1000 nm range and increase in the electrical conduction but no changes in the Fourier transform infra-red spectra. Such nanocomposite films would be useful in the fabrication of organic solar cells.