ZNO/(SRTIXFE1-X)O3 FOR OPTOELECTRONIC APPLICATIONS

Abstract

THE MONOLITHIC INTEGRATION OF LUMINESCENT WURTZITE ZNO AND MAGNETIC PEROVSKITE SRTI1-XFEXO3 (STF) WITH A VIEW TO OPTOELECTRONIC APPLICATIONS WAS STUDIED IN THREE ASPECTS: OPTICAL PROPERTIES OF ISOLATED ZNO NANORODS, ELECTRONIC BAND ALIGNMENT OF LATERAL ZNO/STF FILMS, AND THREE-DIMENSIONAL EPITAXY OF ZNO/STF VERTICAL NANOCOMPOSITES FILMS. VERTICALLY ALIGNED AND HIGHLY ORDERED ZNO NANORODS WERE OBTAINED USING AQUEOUS SOLUTION METHOD AND NANOIMPRINT LITHOGRAPHY. THE NEAR BAND EDGE EMISSION OF THE NANORODS WAS IMPROVED BY 8 TIMES DUE TO THE ACTIVATION OF HYDROGEN DONORS USING PROPER POST-GROWTH ANNEALING PROCESS. A MOUND FORMATION MECHANISM WAS PROPOSED TO CONTROL THE SHAPE OF THE NANORODS TERRACE. FLAT TERRACES ACT AS MIRRORS OF FABRY-PEROT CAVITIES AND ENABLE ROOM TEMPERATURE LASING BEHAVIOR. IT WAS FOUND THAT THERE IS GOOD CRYSTALLOGRAPHIC MATCHING FOR ZNO ON STF (100) AND (110) BY PULSED LASER DEPOSITION (PLD) GROWTH OF ZNO/STF LATERAL FILMS. THE ELECTRONIC BAND ALIGNMENT ZNO/STF36 (