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Preparation and evaluation of metallic contacts for crystalline
Frodl, Miroslav ; Jandová, Kristýna (referee) ; Hladík, Jiří (advisor)
This work deals with the advanced methods of contact’s fabrication for monocrystalline solar cells and the appropriate methods for the analysis of their properties with a focus on the study and realization the contact’s structures with low contact and sheet resistance fabricated by galvanic and electroless processes. In the first part of the work is discussed the theory of solar cells and buried contacts and in the second part of the work is an evaluation of practical realization.
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Application of laser processes in crystalline silicon solar cells fabrication
Grob, Filip ; Novotný, Marek (referee) ; Hladík, Jiří (advisor)
This work is focused on the use of laser's process in the solar cells fabrication. The first part of Bachelor's work generally handles the theory in the field of the photovoltaic devices and the applications of lasers. In the second practical part of the work are recorded and evaluated the measurements to verify the use of laser to selective doping of N+ layer. There were also investigated applicability the laser for buried contacts fabrication and solar cells edge isolation.
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The direct writing of thick film pastes
Ištvánek, Jan ; Buršík, Martin (referee) ; Hladík, Jiří (advisor)
This work deals with the problem of the thick-film pastes and their printing. In the main chapter of this work, the realization of a workplace for thick-film pastes' printing is described. The construction of the realized plotter and the controlling electronics of the plotter is depicted in detail.In the following chapter, the console, through which the plotter is controlled via PC, and the CAD program, which serves for projecting of the motives printed, are described.In the final chapter of this work, the measured profiles of the paste printed for various settings of printing parameters and the photographs of the motives printed are stated.
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The Optimalization of E-Communication in the UMC Praha 9
Hladík, Jiří ; Toman, Leoš (referee) ; Mikulec, Luděk (advisor)
The subject of this Master thesis is to identify the current situation and find an optimal solutions for communication; especially for e-communication between Municipal District Prague 9 and citizens, based on outcomes from surveys conducted with the citizens, employees and observe other Municipal offices. The theoretical part is mainly focused on the interpretation of terms, some of the relevant types of e-communication, methodology and process of market research. In the practical part is depict the current situation, further analyzed the outcome from the conducted survey research and the resulted suggestions and recommendations. I strongly believe that the outcomes from this Master thesis will contribute to achieve a desired objective of Municipal District Prague 9, which is optimal satisfaction of their citizens.
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The Analysis and Optimization of Selective Technological Processes for Contacts on Crystalline Silicon Solar Cells
Hladík, Jiří ; Sládek, Petr (referee) ; Myslík, Vladimír (referee) ; Szendiuch, Ivan (advisor)
The submitted work deals with the methods for manufacturing and analysis of contacts on crystalline silicon solar cells. It is focused on selective processes for the production of solar cells metal contacts. The masking feature of silicon nitride is used for selective silicon etching, selective phosphorus diffusion and selective electro-less nickel deposition. Properties of metal contacts precursors are investigated using optical microscopy and their electrical properties using methods based on a four-point probe method. Results are used for the manufacturing of silicon, solar cell with an innovative type of the structure of the front side metallization: chemical nickel, conductive adhesive and copper wire. This approach allows to reduce shading of the front area of PV cells with the ability to avoid usage of busbars. The another advantage of this approach is in replacement of costly silver in at least 2/3 cross section of the front side metallization. Selective ablation of silicon nitride layer was conducted by means of IR laser beam.
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The direct writing of thick film pastes
Ištvánek, Jan ; Buršík, Martin (referee) ; Hladík, Jiří (advisor)
This work deals with the problem of the thick-film pastes and their printing. In the main chapter of this work, the realization of a workplace for thick-film pastes' printing is described. The construction of the realized plotter and the controlling electronics of the plotter is depicted in detail.In the following chapter, the console, through which the plotter is controlled via PC, and the CAD program, which serves for projecting of the motives printed, are described.In the final chapter of this work, the measured profiles of the paste printed for various settings of printing parameters and the photographs of the motives printed are stated.
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The Analysis and Optimization of Selective Technological Processes for Contacts on Crystalline Silicon Solar Cells
Hladík, Jiří ; Sládek, Petr (referee) ; Myslík, Vladimír (referee) ; Szendiuch, Ivan (advisor)
The submitted work deals with the methods for manufacturing and analysis of contacts on crystalline silicon solar cells. It is focused on selective processes for the production of solar cells metal contacts. The masking feature of silicon nitride is used for selective silicon etching, selective phosphorus diffusion and selective electro-less nickel deposition. Properties of metal contacts precursors are investigated using optical microscopy and their electrical properties using methods based on a four-point probe method. Results are used for the manufacturing of silicon, solar cell with an innovative type of the structure of the front side metallization: chemical nickel, conductive adhesive and copper wire. This approach allows to reduce shading of the front area of PV cells with the ability to avoid usage of busbars. The another advantage of this approach is in replacement of costly silver in at least 2/3 cross section of the front side metallization. Selective ablation of silicon nitride layer was conducted by means of IR laser beam.
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