Synthesis of hierarchical porous ZnO by dual template method and its electroluminescence characteristics

ZnO precursors were synthesized by a sol-gel method using pluronic P123 as mesoporous template in this paper. Then filled the polystyrene(PS) template which was self-assembled from PS spheres with the as-prepared ZnO precursors. The gel of polystyrene/inorganic was completed at 55°C in the drying oven. Hierarchical meso-macroporous ZnO were obtained after the decomposition of the organic template, i. e. PS and P123, by calcining at 600°C for 10h. The as-prepared samples were characterized by scanning electron microscope(SEM) and Fourier transform infrared spectroscopy(FT-IR). The electroluminescence results indicate that the EL emission intensity of calcined hierarchical porous ZnO is 3.3 times higher than mesoporous ZnO under the same elecric field intensity.