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Multiple repeated procedure of spin-coating, thermal annealing and midcycle washing of the non-conductive PSS component was developed to fabricate the multilayer PEDOT:PSS films. A 4–5 times enhanc...

The possibility of increasing the photosensitivity of organic heterostructures by using the bilayer transparent ITO electrodes with organic conducting polymer polyaniline, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) complex (PEDOT:PSS) and CuI has been verified experimentally. Photosensitive n-type organic semiconductor N,N′-dimethyl-3,4,9,10-perylenetetracarboxylic acid diimide (МРР) and p-type pentacene were chosen as components of these heterostructures. Usage of ITO/PEDOT:PSS bilayer electrodes leads to increasing the photovoltaic sensitivity of these heterostructures by 2–3 orders and by 1–2 orders when using CuI due to decreasing the recombination of excitons and increasing the potential barrier heights on the interface between the organic semiconductor and layers of PEDOT:PSS and CuI.

The effect of texturing interfaces on the optical and photoelectric properties of anisotype and isotype organic (OS)/inorganic (IS) semiconductor heterojunctions has been investigated. p-(Pentacene) and n-(methyl perylene pigment, MPP) type organic semiconductor layers were evaporated on n-GaAs and p-InP substrates, respectively, with flat substrates and the substrates textured by chemical anisotropicetching (with a microrelief of the quasigrating type). The spectra of the light reflectance and the short-circuit photocurrent for the Au/OS/IS heterostructure were measured and analyzed to distinguish the contribution of the photocurrent generated in the OS layer. A considerable enhancement of the photocurrent generated in both inorganic and organic semiconductors was found for structures with textured interface.