. . . . "V\u00FDzkum bodov\u00FDch defekt\u016F v ZnO a studium jejich interakce s vod\u00EDkem a dus\u00EDkem" . "2015-12-31+01:00"^^ . "17"^^ . . "Investigation of point defects in ZnO and their interaction with hydrogen and nitrogen"@en . . . . "2014-04-18+02:00"^^ . "17"^^ . . "http://www.isvav.cz/projectDetail.do?rowId=GAP108/11/0958"^^ . . "V navrhovan\u00E9m projektu bude proveden komplexn\u00ED v\u00FDzkum bodov\u00FDch defekt\u016F v ZnO. Jako hlavn\u00ED metoda pro studium defekt\u016F bude pou\u017Eita pozitronov\u00E1 anihila\u010Dn\u00ED spektroskopie (PAS) v\u010Detn\u011B vyu\u017Eit\u00ED svazku pomal\u00FDch pozitron\u016F s laditelnou energi\u00ED. PAS v\u00FDsledky budou interpretov\u00E1ny pomoc\u00ED nejmodern\u011Bj\u0161\u00EDch ab-initio teoretick\u00FDch v\u00FDpo\u010Dt\u016F. V projektu bude provedeno srovn\u00E1n\u00ED defekt\u016F v ZnO monokrystalech a epitaxn\u00EDch a nanokrystalick\u00FDch tenk\u00FDch vrstv\u00E1ch ZnO. Studium defekt\u016F bude doprov\u00E1zeno v\u00FDzkumem elektrick\u00FDch (teplotn\u011B z\u00E1visl\u00FD Hall\u016Fv jev, transientn\u00ED spektroskopie hlubok\u00FDch hladin) a optick\u00FDch (fotoluminiscence, optick\u00E1 propustnost) vlastnost\u00ED s c\u00EDlem naj\u00EDt spojitost mezi typem a konfigurac\u00ED defekt\u016F a elektrick\u00FDmi a optick\u00FDmi vlastnostmi ZnO vzork\u016F. V navrhovan\u00E9m projektu bude d\u00E1le studov\u00E1na interakce vod\u00EDku a dus\u00EDku s bodov\u00FDmi defekty a vliv vod\u00EDku a dus\u00EDku na elektrick\u00E9 a optick\u00E9 vlastnosti ZnO. V\u00A0r\u00E1mci \u0159e\u0161en\u00ED projektu bude vyrobena nov\u00E1 UHV komora pro depozici tenk\u00FDch vrstev ZnO spojen\u00E1 p\u0159\u00EDmo se svazkem pomal\u00FDch pozitron\u016F s\u00A0laditelnou energi\u00ED. Tato konfigurace umo\u017En\u00ED PAS m\u011B\u0159en\u00ED tenk\u00FDch vrstev in-situ p\u0159\u00EDmo b\u011Bhem depozice. T\u00EDm z\u00EDsk\u00E1me vyn\u00EDme\u010Dnou p\u0159\u00EDle\u017Eitost studovat vznik defekt\u016F a zabudov\u00E1n\u00ED vod\u00EDku a dus\u00EDku do\u00A0 ZnO struktury b\u011Bhem r\u016Fstu tenk\u00E9 vrstvy." . . . "ZnO hydrogen nitrogen point defects positron annihilation"@en . . "1"^^ . "Complex investigations of point defects in ZnO are proposed in the present project. Positron annihilation spectroscopy (PAS) including also variable energy PAS using slow positron beam will be used as a principal technique for defect studies. State\u2013of\u2013art ab-initio theoretical calculations will be employed for interpretation of PAS data. Defects in ZnO single crystals will be compared with those in epitaxial and nanocrystalline ZnO thin films. Defects studies will be combined with electrical (temperature-dependent Hall effect, deep level transient spectroscopy) and optical (photoluminescence, optical transmission) measurements in order to find a link between predominant defect configurations and specific electrical and optical properties of ZnO samples. Moreover, in the present project we intend to investigate interaction of hydrogen and nitrogen with point defects in ZnO and influence hydrogen and nitrogen on electrical and optical properties. A new UHV chamber for on-line sputtering of ZnO films will be constructed and connected to slow positron beam. This novel setup enables to perform variable energy PAS investigations of thin ZnO films in-situ during film deposition. It gives us an exclusive possibility to investigate formation of defects and incorporation of impurities into ZnO lattice during film growth."@en . . "2015-04-23+02:00"^^ . . . "2"^^ . "GAP108/11/0958" . . "0"^^ . "2011-01-01+01:00"^^ .