Preparation And Properties Of Sb Doped ZnO Nanoparticles

ZnO as a wide band gap semiconductor materials,with wide band gap(3.37 eV) and a large exciton binding energy(60 meV),have a wide range of uses in the manufacture of transparent conductive electrodes,surface acoustic wave devices,sensors,flat panel display devices,solar cells and many other fields.ZnO doped with 3d transition metal cations(eg Mn, Co,Fe,etc.) can get magnetic semiconductors.Dietl predicted that doped ZnO can get room temperature ferromagnetism,and experiment found that,n-type diluted magnetic semiconductor materials are mostly paramagnetic materials,and p-type diluted magnetic semiconductor may get ferromagnetism.Theoretically predicted that Sb-doped ZnO can gained p-type,therefore prepared Sb-doped,Mn-doped and Sb,Mn-codoped ZnO nano-materials and study its structure and properties is very importent.ZnO:Sb nanoparticles were synthesized by the Sol-gel method.The XRD and raman spectra showed that in ZnO lattice Zn²⁺ has been replaced by Sb³⁺,with the concentration increase the nano-particles radius become smaller.from temperature dependent PL measurement spectra we determine the binding energy of the acceptors to be 131 meV at 81 K, suggests that it is a Sb_Zn-2V_Zn complex with activation energy of about160 meV.ZnO:Mn nanoparticles were synthesized by the sol-gel method.The XRD and raman spectra showed that Mn has been doped into ZnO,PL measurement spectra showed that Luminous peaks intensity were reduced after doped with Mn,suggests that Mn has passivation the light-emitting,and we also observed the blue shift of emission peak.Sb,Mn-codoped ZnO nanoparticles were synthesized by the sol-gel method.The XRD and raman spectra showed that Mn and Sb has been doped into ZnO.PL measurement spectra showed that UV emission peak blue-shift,due to constraints of small size enhanced quantum size effects.Raman spectra showed that a wide Raman scattering peak at 530cm^-1.