镉的硫族化合物半导体纳米线阵列的模板法合成及其紫外可见吸收光谱研究(英文)

以多孔氧化铝为模板 ,用交流电分别通过含有相应的CdCl2 、ZnCl2 、单质S、Se等的二甲亚砜 (DMSO)溶液 ,沉积CdS、CdSe以及CdxZn1-xS半导体纳米线阵列并研究其紫外可见吸收光谱 .实验结果表明 ,当半导体纳米线的直径小于 2 5nm时 ,其吸收边相对于体相的吸收边产生蓝移 ,而且蓝移的幅度随着半导体纳米线直径的减小而增加 ,显示了明显的量子限域效应 .

Template Synthesis and UV-Vis Absorption Spectra of the Nanowire Arrays of Cadmium Chalcogenides

XU Shi_min, XUE Kuan_hong , KONG Jing_lin, SUN Dong_mei, FENG Yu_ying, LU Hai_yan (Dept. of Chem., Nanjing Normal Univ., Nanjing 210097, China) WANG Guang_hou (National Laboratory of Solid State Microstructures, Nanjing Univ., Nanjing 210093, China)The porous alumina membrane formed in the anodic oxidation of highly pure aluminum foil has attracted a great deal of attention in recent years 1] . It can be served as a desired template to prepare nanometer scale materials 2] due to its unique structure of discrete and cylindrical nanopores, paralleled one another, with the homogeneous size and distribution 3] . Chalcogenide semiconductors have promising prospect in the applications of photovoltaic 4] and photoconducting devices 5] and have been extensively exploited for many years. Olbright and his co_workers studied experimentally and theoretically the optical nonlinearties of CdS xSe 1-x _doped glass 6] ; Britt and Ferekides reported that the conversion efficiency in a solar cell of thin_film CdS/CdTe could be as high as 15.8% 7] . Here we report the fabrication and UV_Vis absorption spectra of CdS、CdSe and Cd xZn 1-x S nanowire arrays deposited into the template matrix of porous alumina. The diameters of these nanowires were varied from 10 nm to 50 nm in our experiments.