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	Influence of external fields on electric field and photocurrent in CdTe detectors Rejhon, Martin ; Franc, Jan (advisor) ; Oswald, Jiří (referee) This thesis is focused on a study of CdTe and CdZnTe semiconductor detectors working under high flux of radiation. We studied experimentally an influence of high flux of X-rays and optical radiation on polarization of the detector. The polarization phenomenon decreases the efficiency of the detector due to a screening of an applied electric field by a space charge accumulated at deep levels due to a trapping of photogenerated carriers. In order to measure the electric field profiles in the detectors we employed a method based on cross polarizers technique and Pockels effect. The main objective of this work was to study the possibilities of an optical de-polarization of CdTe and CdZnTe detectors for different photon energies of additional light, its dynamics and physical origin. We have found that detectors can be de-polarized by above bandgap light. Moreover, CdZnTe detector can be depolarized by near infrared light and in a pulse mode. The de- polarization is associated with a compensation of the space charge at deep traps. Detailed record
	Influence of external fields on electric field and photocurrent in CdTe detectors Rejhon, Martin ; Franc, Jan (advisor) This thesis is focused on a study of CdTe and CdZnTe semiconductor detectors working under high flux of radiation. We studied experimentally an influence of high flux of X-rays and optical radiation on polarization of the detector. The polarization phenomenon decreases the efficiency of the detector due to a screening of an applied electric field by a space charge accumulated at deep levels due to a trapping of photogenerated carriers. In order to measure the electric field profiles in the detectors we employed a method based on cross polarizers technique and Pockels effect. The main objective of this work was to study the possibilities of an optical de-polarization of CdTe and CdZnTe detectors for different photon energies of additional light, its dynamics and physical origin. We have found that detectors can be de-polarized by above bandgap light. Moreover, CdZnTe detector can be depolarized by near infrared light and in a pulse mode. The de- polarization is associated with a compensation of the space charge at deep traps. Detailed record
	The Effect of the Various Electrolyte Types on the Generation of Photocurrent Morozová, Magdalena ; Klusoň, Petr ; Krýsa, Josef ; Šolcová, Olga This work was focused on the utilization of photocatalysis in electrochemical experiments. The generation of photocurrent was measured during the photoelectrocatalytical degradation of substrates in electrolytes on the surface of the thin TiO2/ITO working electrode. The relationship between values of photocurrent and structures of amino acids, mono- and dicarboxyl acids was investigated. Detailed record

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