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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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Organic solar cells
Sionová, Marcela ; Navrátil, Jiří (referee) ; Weiter, Martin (advisor)
This bachelor thesis concentrates on the properties characterization of new organic materials for solar cells. In the theoretical part, there is a solar cells themed literature search and a description of the fotovoltaic energy conversion. The practical part includes the preparation of solar cells with classic and invert structure and comparsion their efficiency on transparent electrodes from a different producers.
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Organic materials for photonic applications
Kubíček, Václav ; Heinrichová, Patricie (referee) ; Weiter, Martin (advisor)
The bachelor's thesis focuses on characterisation of optical properties of substituated diphenyl-distyrylbenzenes for their potancial aplication in organic photonics. Dependance of molecular structure, used solvent and form on optical properties was studied. The theoretical part consists of research about current situation in organic photonics, it focuses mainly on organic photovoltaics. Results show that optical properties fundamentally depend on electronacceptor power of substituated group. Optical properties are also influenced by used solvent.
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Optimization of organic solar cells
Kratochvíl, Matouš ; Novák, Vítězslav (referee) ; Weiter, Martin (advisor)
This diploma thesis focuses on the preparation of large-scale organic solar cells using techniques compatible with large volume production. The theoretical part consists of research summarizing the basic theoretical background of the function of organic solar cells and the current state of investigation of the shift from laboratory to large-scale production. The experimental part deals with the optimization of methods of preparation of layers of structure of solar cells, which can be converted into industrial scale.
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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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Application of plasmonics in organic photovoltaics
Láska, Martin ; Fejfar, Antonín (referee) ; Šikola, Tomáš (advisor)
Tato diplomová práce se zabývá studiem plasmonicky navýšené absorpce vedoucí ke zlepšení účinnosti organických solárních článků. K navýšení absorpce světla ve fotoaktivní vrstvě jsou použity koloidní nanočástice stříbra. Rozptyl světla z nanočástic střibra do fotoaktivní vrstvy představuje jedno z možných řešení, jak navýšit celkovou účinnost fotovoltaických zařízení. Simulace elektromagnetických jevů jsou pro statické podmínky prováděny v softwaru Lumerical (Lumerical Solutions, Inc.). Je zkoumána absorpce ve fotoaktivní vrstvě v závislosti na konfiguraci stříbrných nanočástic. Simulace potvrzují, že ve fotoaktivní vrstvě, která je modifikovaná nanočásticemi stříbra, dochází k navýšení absorpce. Abychom potvrdili výsledky simulací, bylo vyrobeno několik stříbrem modifikovaných vzorků. Vzorky byly pro tento druh experimentu připravené z poly(3-hexyltiofenu):[6,6]-fenyl-C61-butyric-acid-metyl esteru. U některých, nanočásticemi stříbra modifikovaných, vzorků dochází k navýšení tvorby excitonů, v důsledku čehož je pozorován nárůst fotoproudu. V této práci je zahrnut teoretický i experimentální přístup k dané problematice.
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Deposition and study of optoelectronic properties of thin films for organic photonics
Nagyová, Veronika ; Hubálek, Jaromír (referee) ; Weiter, Martin (advisor)
This diploma thesis concentrates on the properties characterization of new organic materials for solar cells. In the theoretical part, there is a solar cells themed literature search, there is described a mechanism of conversion of solar energy, factors influencing photovoltaic conversion efficiency and materials using for preparation of organic solar cells. The practical part includes the preparation of solar cells and characterization of optical and electrical properties of the studied materials in thin layers and solutions. Used materials were conjugated polymers and derivatives of fullerenes.
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