Photoelectric Effect in an Organic-Semiconductor-Based ZnPc:C-70 Heterostructure with a Subwavelength Aluminum Grating

摘要

The dependence of the ampere-watt sensitivity of a hybrid photoelectric structure, which consists of a transparent ITO electrode, a film of a mixture of organic semiconductors (zinc phthalocyanine ZnPc, and fullerene C-70), and a subwavelength aluminum grating as the second electrode, on the polarization and direction of an exciting light flux is experimentally studied. The efficiency of conversion of TM-polarized light into a photocurrent is found to increase manifold in the case of excitation on the side of the aluminum nanograting. The experimental results are explained in terms of a numerical model, which takes into account the plasmon contribution to the optical field inside the organic film in the case of TM-polarized light.