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Material prinitng of electroluminiscent panel
Guricová, Patrícia ; Dzik, Petr (referee) ; Vala, Martin (advisor)
This works deals with the preparation of luminescent lamp using screen printing method, characterization of individual layers and the study of spectral properties, influenced by changing printing parameters. In theoretical part are described the principles of electroluminescence as well as the method of preparation of the luminiscent lamp. Experimental part involves optimazing of printing parametres, so the homogenneous light emission is achieved. Furthermore, the influence of the change in the number of layers of active material and dielectric on the light output of the panel at the lowest working voltage is studied. The result of this work is a funcional electroluminescence lamp and an optimazed process for its preparation.
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Study of the influence of the dielectrics on the optoelectronic properties of electroluminescent devices
Foldynová, Klára ; Novák, Vítězslav (referee) ; Vala, Martin (advisor)
This diploma thesis is studing the possibilities of influencing the optoelectric properties of printed light emitting panels, which work on the principle of electroluminescence excited by alternating electric field. The aim of this worrk is to monitor the influence od dielectric properties of electroluminescent phosphor binder on the targeted electroluminescence. In the theoretical part of this thesis, there are described principles of electroluminescence, suitable materials methods of characterization and preparation of panels using printing techniques. Experiment part contains electrical characterization of selected binders to determine their dielectric constants. Subsequently, printing pastes were formulated in different weight ratios of binder electroluminescent phosphor and model light-emitting panels were prepared. Optoelectric characterization was used to determine the change in irradiance. It was found that the dielectric properties of the binder significantly affect the resulting irradinace. It has same irradiance for a smaller amount od phosphor than with the binder with a low dielectric constant. The finding of this work can be used to improve the luminosity at the electroluminescent panels.
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Modification of inks for luminescent panels
Foldynová, Klára ; Dzik, Petr (referee) ; Vala, Martin (advisor)
This bachelor thesis deals with the study of the influence of luminescent additives on the features of printed electroluminescent elements. The goal of the thesis is to find a strategy for expanding the color spectrum of these elements while maintaining their functionality. An important step was the addition of additive to the basic luminescent layer of ZnS and its influence on emission of radiation. A change of color spectrum was proved by usage the U111 fluorophore and in particular the wavelength change and the intensity of the radiation on the input voltage and frequency were observed. The obtained results can be used in further studies to extend the knowledge of electroluminescence.
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Study of the influence of the dielectrics on the optoelectronic properties of electroluminescent devices
Foldynová, Klára ; Novák, Vítězslav (referee) ; Vala, Martin (advisor)
This diploma thesis is studing the possibilities of influencing the optoelectric properties of printed light emitting panels, which work on the principle of electroluminescence excited by alternating electric field. The aim of this worrk is to monitor the influence od dielectric properties of electroluminescent phosphor binder on the targeted electroluminescence. In the theoretical part of this thesis, there are described principles of electroluminescence, suitable materials methods of characterization and preparation of panels using printing techniques. Experiment part contains electrical characterization of selected binders to determine their dielectric constants. Subsequently, printing pastes were formulated in different weight ratios of binder electroluminescent phosphor and model light-emitting panels were prepared. Optoelectric characterization was used to determine the change in irradiance. It was found that the dielectric properties of the binder significantly affect the resulting irradinace. It has same irradiance for a smaller amount od phosphor than with the binder with a low dielectric constant. The finding of this work can be used to improve the luminosity at the electroluminescent panels.
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|
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Modification of inks for luminescent panels
Foldynová, Klára ; Dzik, Petr (referee) ; Vala, Martin (advisor)
This bachelor thesis deals with the study of the influence of luminescent additives on the features of printed electroluminescent elements. The goal of the thesis is to find a strategy for expanding the color spectrum of these elements while maintaining their functionality. An important step was the addition of additive to the basic luminescent layer of ZnS and its influence on emission of radiation. A change of color spectrum was proved by usage the U111 fluorophore and in particular the wavelength change and the intensity of the radiation on the input voltage and frequency were observed. The obtained results can be used in further studies to extend the knowledge of electroluminescence.
|
|
|
Material prinitng of electroluminiscent panel
Guricová, Patrícia ; Dzik, Petr (referee) ; Vala, Martin (advisor)
This works deals with the preparation of luminescent lamp using screen printing method, characterization of individual layers and the study of spectral properties, influenced by changing printing parameters. In theoretical part are described the principles of electroluminescence as well as the method of preparation of the luminiscent lamp. Experimental part involves optimazing of printing parametres, so the homogenneous light emission is achieved. Furthermore, the influence of the change in the number of layers of active material and dielectric on the light output of the panel at the lowest working voltage is studied. The result of this work is a funcional electroluminescence lamp and an optimazed process for its preparation.
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