|
|
Deposition and characterization of low molecular thin films for organic photonics
Omasta, Lukáš ; Salyk, Ota (referee) ; Weiter, Martin (advisor)
This diploma thesis is focused on characterization of properties of new organic materials with respect to its potential application in organic photonics. The theoretical part contains a themed literature research on low molecular thin films for organic photonics, mainly phthalocyanines together with description and structure of the photovoltaic energy conversion. The practical part includes the preparation of thin layers of selected organic materials for organic photonics. Prepared thin films were characterized by optical methods and current voltage characteristics. Based on these results, the thin films and structure of solar cells were optimalized. Acquired data were used to determine the materials and structures suitable for photonics applications.
|
|
|
Study of dielectrical properties of organic material thin films
Pospíšil, Jan ; Boušek, Jaroslav (referee) ; Mikula, Milan (referee) ; Zmeškal, Oldřich (advisor)
The dissertation is focused on the study of electric and especially dielectric properties of thin film organic materials with their huge potential for optoelectronics and other industrial sectors. The theoretical part deals with the use of organic materials in organic photovoltaic cells, the methods of deposition techniques and characterization. The theoretical knowledge of the dielectric spectroscopy, including methods for determining the physical properties and evaluation of experimental data are also described. The experimental part is devoted to the study of small molecule organic solar cells with bulk heterojunction composed of electron donor molecule of DPP(TBFu)2 and electron acceptor fullerene derivatives, such as PC60BM, PC70BM and TC60BM. The experimental part is divided into two main parts. The first part deals with the study of processes occurring at the interface between the active layer and the contact; the second part is focused on transport processes inside the structure of photovoltaic cells and also contains a study of perovskite solar cells.
|
|
|
Optimization of multilayer structures for organic electronics
Paruzel, Bartosz ; Pfleger, Jiří (advisor) ; Kalvoda, Ladislav (referee) ; Syrový, Tomáš (referee)
Organic electronic devices such as organic field effect transistors (OFETs), light- emitting diodes (OLEDs), resistive memory elements or organic solar cells have attracted an increasing attention in recent years due to the vision of a low-cost and large-scale production of printable electronics. Many papers published during the last decade focused on the intrinsic properties of organic conductors, semiconductors and dielectric materials. Since most of the devices consist of multilayer structures the mutual influence of the processes that take place in the particular layers are important for the functionality of the whole device. This work is aimed to contribute to the characterization and understanding of the mutual interactions of individual layers in the multilayer structures of organic devices. The main achievements of this work can be listed as: (i) Optimization of the thermal stability and dielectric properties of cyanoethylated polyvinylalcohol (CEPVA) high-k dielectric by the crosslinking reaction with the low molecular weight materials or mixing with a high Tg polymer. (ii) Finding possible phenomena in the CEPVA polymer dielectric that influence the charge carrier transport in the OFET active channel made of bis(triisopropylsilylethynyl) pentacene organic semiconductor, using a...
|
|
|
Study of dielectrical properties of organic material thin films
Pospíšil, Jan ; Boušek, Jaroslav (referee) ; Mikula, Milan (referee) ; Zmeškal, Oldřich (advisor)
The dissertation is focused on the study of electric and especially dielectric properties of thin film organic materials with their huge potential for optoelectronics and other industrial sectors. The theoretical part deals with the use of organic materials in organic photovoltaic cells, the methods of deposition techniques and characterization. The theoretical knowledge of the dielectric spectroscopy, including methods for determining the physical properties and evaluation of experimental data are also described. The experimental part is devoted to the study of small molecule organic solar cells with bulk heterojunction composed of electron donor molecule of DPP(TBFu)2 and electron acceptor fullerene derivatives, such as PC60BM, PC70BM and TC60BM. The experimental part is divided into two main parts. The first part deals with the study of processes occurring at the interface between the active layer and the contact; the second part is focused on transport processes inside the structure of photovoltaic cells and also contains a study of perovskite solar cells.
|
|
|
Deposition and characterization of low molecular thin films for organic photonics
Omasta, Lukáš ; Salyk, Ota (referee) ; Weiter, Martin (advisor)
This diploma thesis is focused on characterization of properties of new organic materials with respect to its potential application in organic photonics. The theoretical part contains a themed literature research on low molecular thin films for organic photonics, mainly phthalocyanines together with description and structure of the photovoltaic energy conversion. The practical part includes the preparation of thin layers of selected organic materials for organic photonics. Prepared thin films were characterized by optical methods and current voltage characteristics. Based on these results, the thin films and structure of solar cells were optimalized. Acquired data were used to determine the materials and structures suitable for photonics applications.
|
guest ::
