Preparation And Research Of Co-doped ZnO On FTO Conductive Glass And Al₂O₃ Sapphire Substrate

Zinc Oxide?ZnO?,the stable structure of room temperature condition is six angle lead zinc ore structure,II-VI group semiconductor material,have excellent physical and chemical properties.Because of its excellent quantum conversion efficiency and photo catalytic performance,it has already been a hot spot in the study of dye sensitized solar cells and photo catalyst.Moreover,ZnO has more crystal structure compared with TiO2,a semiconductor material that is also a research hot spot.It has more characteristics and deserves our further research and exploration.In this paper,a series of experiments on the preparation of ZnO by hydrothermal method.?1?C₆H₁₂N₄ and Zn?CH₃COO?₂.2H₂O are mixed by 1:1 as precursor.The uniqueness of Zinc Oxide with different morphology and structure is explored by changing the substrate,the concentration of precursor solution,the temperature of hydrothermal reaction and annealing treatment.?2?Similarly,C₆H₁₂N₄ and Zn?CH₃COO?₂.2H₂O are mixed by 1:1 as precursor.andthentheprecursorwasCodopedwithdifferentconcentrations?Co?CH₃COO?₂.4H₂O/Zn?CH₃COO?₂.2H₂O=1%,3%,5%,7%,9%?.The change of properties and morphology of ZnO was studied by CO doping concentration.Through a series of experiments and testing of XRD,PL,EDS and SEM,we have obtained the following results:?1?In the hydrothermal preparation of Zinc Oxide materials.Due to its excellent physical and chemical properties,Al₂O₃ substrate has smaller lattice coefficient mismatch rate than semiconductor Zinc Oxide,and it can grow Zinc Oxide material with relatively excellent luminescent properties on the FTO substrate.?2?In the process of preparing Zinc Oxide by hydrothermal reaction,the concentration of precursor solution determines the growth thickness of nano Zinc Oxide,and the difference of material thickness also makes the properties of Zinc Oxide materials affected by substrate materials.Acuteness?3?The temperature of hydrothermal reaction directly determines the intensity of hydrothermal reaction.The intensity of hydrothermal reaction also influences the luminescent properties and morphologies of Zinc Oxide materials.From 100 degrees to 120 degrees and to 150 degrees,with the increase of temperature,the hydrothermal reaction become more intense,There is a change in the morphology of Zinc Oxide from“rod”structure flowering to"bouquet"structure,and then flowering to"ball-flower"structure.?4?After cleaning and drying of the Zinc Oxide material,the material was annealed at 350 degrees for 1.5 hours.Under high temperature,the defects of the Zinc Oxide material increased,the UV peak was blue shift and the luminescence intensity became weaker.?5?The preparation of different cobalt percentage doped Zinc Oxide by hydrothermal method.From the XRD and PL spectra we can see our excellent doping experiments on Zinc Oxide.And the modification of the prepared nano Zinc Oxide has been successfully realized.Moreover,it can be observed and analyzed from the Zinc Oxide SEM diagram with different cobalt doping concentrations.The doping of cobalt will ease the drastic degree of the hydrothermal reaction of Zinc Oxide.The degree of relaxation is proportional to the doping concentration.This is accordance with the conclusions in the previous luminescence test that with the increase of doping concentration,the luminescence of Zinc Oxide weakens.The high concentration of cobalt acetate makes the water heat reaction of Zinc Oxide weaken.Zinc acetate does not form a six square stereostructure.The degree of luminescence is weakened.The morphology control and characteristics of cobalt metal ions doped with Zinc Oxide have been successfully realized.The process of the growth of Zinc Oxide from the"needle"structure to the"rod"structure of the six party was prepared.