Abstract: An organic template of monodisperse polystyrene spheres (PS) was prepared by a soap-free polymerization method. The spaces in the PS templates were filled by the sol synthesized by using Zn(CH₃COO)₂·2H₂O, NH(C₂H₂OH)₂, ethanol and distilled water. The gelation of polystyrene/inorganic precursor was completed at room temperature. Ordered porous ZnO films were obtained after removing PS template by calcining. The influnce of precursor concentration and dipping time on the arrangement of the pores was discussed. TG-DTA, XRD, TEM, SEM, IR reflection spectrum and UV-VIS spectrum were applied to characterize structures and properties of the films. The results show that the PS template has fcc structure in which the (111) plane is paralleled to substrate and the diameter of PS is 420nm. The transformation temperature of ZnO from amorphous to blende is 460℃. The diameter of the pores is about 280nm and the pore-wall is made up of ZnO grains with diameter of about 46nm. The transmissivity reaches 60%. E _g is 3.24eV.

Key words: ordered porous ZnO film, PS template, soap-free polymerization, dip-coating method