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Chemical composition of photovoltaic panels
Koudelová, Marta ; Šebek, Ondřej (advisor) ; Tejnecký, Václav (referee)
The bachelor's thesis is focused on the issue of photovoltaic cells and panels. The literature search was formed from selected available literature with the purpose to characterize different types of the crystalline silicon photovoltaic cells and thin-films photovoltaic cells and describe the application of photovoltaic cells in the world and in the Czech Republic. In the next part of this thesis is a summary of current knowledge about recycling of photovoltaic cells and other utilization of layers and their possible impact on the environment. The practical part of the thesis deals with selected samples of PV panels. A few samples of photovoltaic panels were taken for chemical analyses. Chemical analyses are performed of the five samples of the photovoltaic panels. The results of chemical analyses were compared with acquired data from the literature. The results of the multielementary analysis of selected samples was that the photovoltaic panels contain a risk elements (e. g. As, Cd, Sb, Mo). The PV panels also contain economics utilizable elements (Ag). Content of silicon is up to 78,18 % SiO2. Key words Photovoltaic panel, photovoltaic cell, chemical analysis, risk elements, recycling
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Chemical composition of photovoltaic panels and assessment of their environmental risks
Koudelová, Marta ; Strnad, Ladislav (advisor) ; Drahota, Petr (referee)
The diploma work deals with chemical composition of photovoltaic panels and assessment of their environmental risks. In its introduction part, the characterization of photovoltaic panels, including the composition of their layers and the significance of some specific metals in these facilities, is summarized. The introduction part also mentions the life cycle of photovoltaic panels from production to end of life. The experimental part is focused on chemistry of several different types of photovoltaic panels. In addition to the major elements of the panels (Si, Al, Fe, Na, Ca), the analyzes confirmed the increased content of interest metals (especially Cu, Ag, Sb, Sn, Zn, Pb) at tens to thousands of mg/kg depending on the processed sample. A potentially economically interesting value is Ag. The Ag concentrations range from hundreds to 1,300 mg/kg (~ 1,200 g Ag / t of panels) for some types of processed samples. High concentrations exhibit Cu (up to 16,700 mg/kg), Sb (up to 1,890 mg/kg) or Sn (up to 2050 mg/kg). Leaching experiments (using deionized water and EDTA reagents) were performed at two time intervals (24 and 168 hours). Very low leachability of the metals from the studied samples (in order of per mil or less) has been demonstrated. The studied samples of photovoltaic panels can be classified...
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Chemical composition of photovoltaic panels
Koudelová, Marta ; Šebek, Ondřej (advisor) ; Tejnecký, Václav (referee)
The bachelor's thesis is focused on the issue of photovoltaic cells and panels. The literature search was formed from selected available literature with the purpose to characterize different types of the crystalline silicon photovoltaic cells and thin-films photovoltaic cells and describe the application of photovoltaic cells in the world and in the Czech Republic. In the next part of this thesis is a summary of current knowledge about recycling of photovoltaic cells and other utilization of layers and their possible impact on the environment. The practical part of the thesis deals with selected samples of PV panels. A few samples of photovoltaic panels were taken for chemical analyses. Chemical analyses are performed of the five samples of the photovoltaic panels. The results of chemical analyses were compared with acquired data from the literature. The results of the multielementary analysis of selected samples was that the photovoltaic panels contain a risk elements (e. g. As, Cd, Sb, Mo). The PV panels also contain economics utilizable elements (Ag). Content of silicon is up to 78,18 % SiO2. Key words Photovoltaic panel, photovoltaic cell, chemical analysis, risk elements, recycling
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