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Information × Registration Number 0225U000455, (0124U002141) , R & D reports Title Multilayer structures with organic polymer semiconductor heterojunctions and Si photon crystal based backside reflectors for photoelectric solar energy converters popup.stage_title Розробка технології отримання тонких плівок органічних напівпровідників (меланінів) та речовини поглинаючих шарів (PEDOT:PSS). Підготовка матеріалів для публікації Розробка технології отримання фотонних кристалів на основі кремнію. Підготовка матеріалів для публікації. Head Sarikov Andrii V., Доктор фізико-математичних наукSkryshevskyi Valerii A., д.ф.-м.н. Registration Date 12-01-2025 Organization Department for special training National academy of science of Ukraine at Kiev University popup.description1 To develop a hybrid photoconverter based on organic and polymer heterojunctions with backside porous photonic crystal reflectors. Organic semiconductor photoconverters are a cheap alternative to traditional Si solar cells (SCs). Their production requires investigations to improve the efficiency, increase the lifetime, and reduce cost. In this work, new promising organic semiconductor materials of the melanin family to apply as SC active layers will be investigated. Porous photonic crystals (PFCs) will be used for the first time as controllable backside reflectors to increase the organic SC efficiency. In this work, the PFCs will be functionalized with nanoparticles and polymer to ensure spectral response in the given spectral range and obtain the required mechanical properties. popup.description2  The first stage of the research work includes the development of a technology for producing thin melanin films to study their capacity as active layers of photoconverters. This technology is based on self-organized film polymerization during natural drying of an aqueous solution of melanin deposited onto a substrate. The optical and electrical parameters of the produced films are investigated. The melanin films are shown to have the characteristics of a transparent low-conductivity polymer with stable in time electrical characteristics and indirect allowed optical transitions with an optical band gap Eg = 1.7 eV and phonon energy ħω = 0.185 eV. Analysis of the infrared transmission spectra reveals the presence of a significant amount of OH groups in the films, indicating their hydrophilicity, as well as sp³ and sp² hybridized CHn bonds, which may have a significant effect on the electrical conductivity of films. It is hypothesized that an increase in the sp² relative to the sp³ hybridized CHn bond concentration can increase the film conductivity by enhancing delocalization of the π electrons. Vacuum sputtering technology is determined to allow the fabrication of conductive transparent ZnO films with a surface resistivity of 6.6...100 Ohm×cm, which is sufficient to create a conductive contact system. The spin-coating technology is chosen for depositing PEDOT:PSS films for manufacturing absorbing layers of photovoltaic converters. The technology of polyvinyl butyral transparent conductive films by adding superionic substances is developed. Product Description popup.authors Ivanov Ivan I. Lysenko Artemii .. Semenenko Mykola O. Shahan Serhii V. popup.nrat_date 2025-01-12 Close