The Strong Luminescence Of Zno Templates Prepared By Sintering Process Research

Recently, wide band-gap compound semiconductors have been paid extensive attention due to their potentials for realizing short-wavelength optoelectronic devices and short-wavelength lasing emission. As one of the candidate materials, ZnO with the hexagonal wurtzite structure is hardly hot excited and possesses the necessary condition for short-wavelength emission at room temperature due to its large band gap (3.37 eV) and large exciton binding energy (60 meV). In addition, ZnO has many advantages, such as high electric capability, good chemistry stability, abundance resources, low expense, which make ZnO an excellent material for optoelectronic applications.Up to now, although there are some results about the EL properties of ZnO, most of the researches in this field have been focused on the EL properties of ZnO thin film based on the doping method. While about ZnO nanometer powders, which are much simpler in preparation, few papers are reported on their EL properties. Base on the previous research, we hugely improved the luminescence intensity by ameliorating the preparation technics, the luminescence property of ZnO and the influence of the precursor with porous structure on the on the EL properties of ZnO were investigated, some significative results were gained.In the research of the preparation of mesoporous ZnO and its EL properties, we mainly improved the sol-gel method and choose ODAand P1 Pluronic F-127 as the template agents respectively; finally we tested their EL properties. The conclusions are followings:1. The best prepare condition for the precursor were obtained : Zn²⁺:LiOH in molar was 1: 1.4; LiOH was added drop by drop in 2-3 hours, and then kept stirring in ice environment(below 4℃) for 4-6 hours, finally dried in vacuum.2. The electroluminescence of the samples dealt with different template reagents showed great diversity in emission intensity. The intensity was also influenced by the dosage of the template reagents. By comparing the EL spectra of the samples prepared with the same method, the emission intensity of all the samples dealt with template reagents was much higher than that of the samples dealt without surfactant. In detail, at the optimal dosages of each template reagent, for the samples dealt with ODA and F-127, the enhanced degrees of intensity are 2.8 and 5.6 times, and the enhanced degrees of energy are 2.6 and 5.8 times respectively.3. The calcining technics is an important factor to the EL properties of ZnO: (1) ZnO precursor dealt with ODA was calcined at different temperatures. The...