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Synthesis and photoluminescent characteristics of 8-hydroxy-2-methylquinoline gallium

Gongneng.Cailiao/Journal of Functional materials 2013年第4期44卷 540-543页

作者： Sun, Chun-Yan Liu, Xu-Guang Tao, Peng.Chen, Liu-Qing Key Lab. of Interface Sci. and Eng. in Advanced Mat. of Taiyuan Univ. of Technol. Ministry of Education Taiyuan 030024 China College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China

8-Hydroxy-2-methylquinoline gallium (Ga(mhq)3) was synthesized, and its molecular structure was characterized by FT-IR spectrometry and 1H NMR techniques. Its optical gap and photocurrent properties were investigated by UV-Vis absorption spectrometry, cyclic voltammetry, fluorescent emission spectrometry and electroluminescent spectrometry. Experimental results show that its optical gap is about 3.10 eV, as determined from its UV-Vis absorption edge. Its UV absorption bands were at 259 and 365 nm. Ga(mhq)3 emitted intensive blue-green fluorescence at peak waveleng.h of 496 and 472 nm in THF solution and powder state, respectively. Finally, devices using Ga(mhq)3 as the emissive layer were fabricated and investigated. The device A with configuration of ITO/NPB(50 nm)/Ga(mhq)3(30 nm)/LiF(1nm)/Al(100 nm) showed maximum emission peak at 508 nm and the maximum brightness of 901.5 cd/m2, after optimization by introducing electron-transporting material Alq3, brightness can reach 4339 cd/m2.

关键词： Luminance

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Preparation of different micro-structural cuprous oxide by solvothermal method

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Gongneng.Cailiao/Journal of Functional materials 2011年第SUPPL. 5期42卷 794-798页

作者： Liang, Jian Dong, Hai-Liang Zhao, Jun-Fu Ma, Shu-Fang Key Lab. of Interface Science and Eng. in Advanced Materials of Taiyuan Univ. of Technology Taiyuan 030024 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China

Cuprous oxide particles with a spherical diameter of about 2 to 3 μm and octahedron size of 4 μm were synthesized by a solvothermal method using copper acetate as raw materials. The effects of different reaction conditions, including temperatures, solvents, ratios of raw materials, and adding surfactant cetyltrimethylammonium bromide (CTAB), on crystal structure and morphology of micron cuprous oxide have been systematically investigated by choosing different reductants, and the optimum condition for preparing spherical and octahedral cuprous oxide has been obtained. The growth mechanism of micron cuprous oxide particles is discussed and supposed.

关键词： Copper oxides

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Effect of amount of cetyltrimethylammonium bromide on morphologies of PbS in microwave synthetic systems

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Gongneng.Cailiao/Journal of Functional materials 2011年第SUPPL. 3期42卷 460-463页

作者： Liang, Jian Wei, Zhao-Ling Li, Tian-Bao Zhao, Jun-Fu Li, Jing Xu, Bing-She Key Lab. of Interface Science and Engineering in Advanced Materials of Taiyuan Univ. of Technology Ministry of Education Taiyuan 030024 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China Department of Physics College of Science Taiyuan University of Technology Taiyuan 030024 China

In two microwave synthetic systems, the effect of CTAB on morphologies of PbS materials was studied and preparation of optimal conditions for both star-shaped and flower-like structure were obtained respectively. The results indicated that under the influence of CTAB, the PbS materials with different morphology were obtain. In former system, PbAc2 · 3H2O was used as lead source, thiourea as sulfur source, DMSO as solvent. With decreasing of the amount of CTAB (0, 0.05, 0.1g), a star-like structure with smooth surface, nano-dendritic structure and perfect star-like structure were formed sequentially. For latter system in which Pb(NO3)2 as lead source, L-cysteine as sulfur source, deionized water as solvent, a flower-like structure was obtained when CATB was set up 0.05g;without CATB the sheet structure and partial cube were observed;however, when the addition of CTAB is 0.025g, we can not see absolute flower structure but the result showed a tendency to assemble flower structure. Meanwhile, combining experiments and literatures, the formation mechanisms of PbS with star-shaped and flower-like structure were discussed.

关键词： Morphology

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