基于AAO的CuCl_2纳米花瓣状薄膜的发光特性研究

Luminescence property of nano-flower-like CuCl_2 film based on AAO template

利用直接沉积法在多孔阳极氧化铝(AAO)材料表面沉积CuCl2·2H2O水溶液制备纳米花状薄膜,并利用场发射扫描电镜对其形貌进行表征,结合X射线光电子能谱等技术鉴定其成分,结果表明纳米花状薄膜为CuCl2。在室温条件下,测量了样品的光致发光光谱特性,观察到表面有纳米花状CuCl2薄膜的AAO,其激发中心在290nm,发射中心在415nm,与基底AAO位置完全相同,但发光强度从127cd提高到183cd;对比宏观CuCl2粉末、AAO薄膜的激发和发射光谱,分析认为生长有纳米花状CuCl2的AAO薄膜发光强度提高的原因是该层表面的纳米结构形貌。

One novel kind of nano-flower-like film was firstly fabricated with the direct deposition method,that was,the CuCl2·2H2O aqueous solution was deposited on the top surface of porous anodic aluminum oxide(AAO)film.The morphology of this nano-flower-like membrane was investigated by the field emission scanning electron microscopy,and the constituent parts were analyzed with the X-ray photoelectron spectroscopy,all the results demonstrated that nano-flower-like film was CuCl2.Then,the characteristic photo luminescence spectra of the AAO film coated with nano-flower-like CuCl2 membrane were measured at room temperature.Results show that the position center of excitation is 290 nm and the emission center is415 nm,these data are the same as the values of AAO film;however,it is excited that the intensity of luminescence increased significantly,from 127 cd to 183 cd.Furthermore,comparing with the excitation and emission spectra of CuCl2 powder and AAO film,the reason that improving the luminous intensity of the AAO film coated nano-flower-like membrane is the morphology of CuCl2nano-structures.