Synthesis And Characterization Of Monodisperse In-Doped ZnO Nanocrystals

In this thesis,optical and electrical properties,synthesis and doping method and extensive applications of ZnO nanocrystal are discussed.ZnO nanocrystals are successfully synthesized in solution.Their properties are thoroughly characterized.In particular,the In-doping effects of ZnO nanocrystal are studied in detail:1.In(St)₃ which were prepared by reacting In(Ac)₃ and HSt,were used as precursor to generate In₂O₃ nanocrystals.2.As-prepared In(St)₃ is used as precursor for the synthesis of In₂O₃ nanocrystal.The effect of reaction temperatures to the shape of nanocrystals is investigated,suggesting that the spherical In₂O₃ nanocrystal is successfully prepared at 290℃.3.Based on the result in part 2,undoped and In-doped ZnO nanocrystal are experimentally conducted.TEM,HRTEM,XRD,PL,UV-vis,and other techniques were used to characterize the structural,morphological and optical properties of the nanocrystals.Obvious blue shift in PL and UV-vis spectra are observed,proving the presence of In-doped ZnO nanocrystal. Meanwhile,the nanocrystal with cubic structure is observed in HRTEM images due to the higher activity of In(St)₃ than Zn(St)₂.The above efforts may be beneficial for the devices based on ZnO and In-doped ZnO nanocrystals in the future.