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Organic semoconductors and devices
Kočer, Martin ; Doc.Ing.Ota Salyk, CSc. (referee) ; Špinka, Jiří (advisor)
Introduction part of this bachelor's thesis deals about general properties of organic semiconductors, their structure and features of selected representatives. The middle section deals with some methods of application of organic semiconductors and organic devices. The final section deals about practical production of polyaniline samples and their analysis.
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Organic semiconductors
Tebich, Ivan ; Macháček, Martin (referee) ; Boušek, Jaroslav (advisor)
My final thesis treats of usage photovoltaic phenomenon to production electric energy by solar cells. It inquires into this phenomenon in organic structures. Further it mentions basic types of constructions organic solar cells and evaluates their properties. In experimental part zhe thesis is focused on characterization thin-film structures made out of photoconductiv organic materials.
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Technologies using organic materials
Galbička, Tomáš ; Chmela, Ondřej (referee) ; Hubálek, Jaromír (advisor)
There are sumarized some of the basic organic materials for produce of organic parts. Two types of theese materials are introduced PPV and PFV and their derivatives, which tuning their resulting properties in area of electrical, optical, chemical, and thermal parameters. There is designed and created system for mechanical bending of adhesive SMD devies on flexible printed circuit board and compared properties of some conducting adhesives.
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Organic electronics for biosensors
Netočný, Martin ; Vala, Martin (referee) ; Salyk, Ota (advisor)
In the first part are discussed the organic thin-film transistors and their possible use for chemical and biological sensors. Middle section discusses the electrical properties of OECT device in steady-state and transient behaviour and potential use of OECT for cell monitoring. The final experimental part deals with influence of temperature, aging, electrolyte environment and geometry on the function of OECT device.
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Electric and dielectric properties of organic materials for photovoltaic applications
Florián, Pavel ; Nešpůrek, Stanislav (referee) ; Zmeškal, Oldřich (advisor)
Diploma thesis deals with the use of organic materials in photovoltaic applications and the study of their electric and dielectric properties. The theoretical part of thesis deals issue of the use of organic polymeric materials in photovoltaics and their advantages and disadvantages. Next are the results of various studies of organic solar cells by other authors. In the practical part of the work are shown experimental results (volt-ampere characteristics and impedance spectra) of samples of organic semiconductors and their evaluation.
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Electrical transport properties of molecular materials for smart applications
Ivancová, Anna ; Vala, Martin (referee) ; Přikryl, Radek (advisor)
This master´s thesis deals with possibilities of application of new organic molecular materials for electronic devices. Nowadays it is a very attractive field of research, because of the tendencies in industry to miniaturize, reduce production costs and develop new, eco-friendlier, processes of production. The theoretical part of the thesis provides a short overview of organic materials suitable for smart applications and thin films issues including their characterization. The experimental part is dedicated to means how to prepare thin-film electronic components to silicon wafers for thin films field effect transistors. The obtained results in the last part of thesis are discussed about properties of prepared thin films, in the concrete about the electrical transport properties, in the connection with the condition of preparation.
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Organic solar cells for photovoltaic conversion of solar energy
Šedina, Martin ; Zmeškal, Oldřich (referee) ; Weiter, Martin (advisor)
This work is focused to study organic materials for solar energy conversion into electricity and characterization of conversion processes. Materials and their blends with semiconducting properties such as photoconductivity were studied. Thin films of organic materials and their blends were prepared by spin-coating method and characterized by optical methods (UV-VIS and photoluminiscence spectroscopy), by current-voltage characteristics, by impedance spectroscopy method, spectral response measurement of photocurrent and method of transient photoconductivity. Structural factors influences the conversion of solar energy into electricity were observed. Based no these results, the materials and their blends useful for photovoltaic applications were determined. The dependence between photoconductivity of thin films and theirs structure was also discussed.
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Charge carrier transport in organic disordered materials
Češka, Matěj ; Navrátil, Jiří (referee) ; Weiter, Martin (advisor)
This bachelor´s thesis deals with organic materials for use in photovoltaic energy conversion. A theoretical part of this thesis contains brief introduction to organic photovoltaics. Thin organic films were prepared and were characterized by optical methods and by current voltage characteristics. It was found that the light illumination can improve conductivity of prepared thin layers.
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