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Powłokowe struktury optyczno-aktywnych materiałów w czujnikach światłowodowych do zastosowań w systemach ekologicznych

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Coraz szybszy rozwój cywilizacyjny i pęd człowieka do wprowadzania nowych technologii pociąga za sobą nieunikniony wpływ na otaczające nas środowisko. W większym, bądź mniejszym stopniu ma to niestety negatywne skutki. Sytuacja taka, co jest obecnie mocno akcentowane, wymaga bardzo wnikliwej oceny stanu naturalnego środowiska i prowadzenia na bieżąco pomiarów jego wielu różnych parametrów, j[...]

Formation of thin polyaniline films by means of ionic sputtering in crossed electromagnetic field

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Polymers with their own electron conduction constitute one of the most interesting classes of organic semiconductor materials [1]. Such polymers pose semiconductor properties [2] caused by the presence of π-electron bonds. From the practical point of view, polyaniline (PAN) which is the simple nontoxic synthesis of high sensitivity to outer factors and high reproductively of optical pro[...]

Optical properties of vacuum deposited poly(o-toluidine) films in integral and fibre optics to use

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Elements basis of fibre and integral optical devices are mainly based on application of electro-physical effects in solids, semiconductors, thin and thick film materials and waveguides. Latest achievements in technology of polymers with proper electronic conduction as well as the study of electro-physical, electro-chromic effects, photosensitivity and luminescence along with unique propertie[...]

Technology development of organic photosensitive structures and study of their electrophysical properties


  The study of electrical properties of photosensitive elements based on organic polymer or low molecular semiconductors (in particular - the current-voltage and capacitance-voltage characteristics and impedance spectroscopy) associated with the study of potential barriers of the metal - semiconductor have been presented in this paper. The good knowledge about mutual dependences of current and voltage gives a possibility to determine the mechanism of charge transport in the developed structures and estimate the effectiveness of the technology of their creation. The main disadvantage of known organic barrier structures is small efficiency due to the small diffusion length of excitons in organic materials, low carrier mobility, small effective surface area of transition, a low concentration of carriers. The results of optimization of technology creation and electrical measurements of organic semiconductor barrier structures have been discussed. The special attention was laid on improving of electrical parameters of devices - in other word - the conductivity of low molecular weight semiconductor materials by doping and increase the active area of structure barriers by introduction of additional transport layers in the anode region of devices. Additionally, the influence of composite coating of low-molecular semiconductors (nickel phthalocyanine) and conjugated polymers (polyaniline) on manufacturing process were also analyzed Structures fabricated on flexible conductive substrate of nickel phthalocyanine films doped with oxygen Most of the phthalocyanines have low intrinsic conduction, which limits their practical application in phototransformator and light-emitting devices [1]. An effective method for increasing the concentration of free charge carriers in them are doping by oxygen molecules. The presence of introduced impurity oxygen leads to a significant increase in the concentration of holes. For example, after exposing of [...]

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