期刊论文

Liu, XB

中文

物理学报

1000-3290

2005

54

1

416-421

10.3321/j.issn:1000-3290.2005.01.078

湖南省自然科学基金 （批准号 :0 4JJ3 0 3 0 ）； 国家自然科学基金 （批准号:195 2 5 410 ）资助的课题~~；

本校为第一且通讯机构

声空化所引发的特殊的物理、化学环境为制备高效发光的多孔硅薄膜提供了一条重要的途径.实验结果表明,声化学处理对于改善多孔硅的微结构,提高发光效率和发光稳定性都是一项非常有效的技术.超声波加强阳极电化学腐蚀制备发光多孔硅薄膜,比目前通用的常规方法制备的样品显示出更优良的性质.这种超声的化学效应源于声空化,即腐蚀液中气泡的形成、生长和急剧崩溃,在多孔硅的腐蚀过程中,孔中的氢气泡,由于超声波的作用增加了逸出比率和塌缩,有利于孔沿垂直方向的腐蚀.

The special physicochemical environment caused by sonic-vacating provides an important outlet for the preparation of highly efficient luminescent porous silicon films. Experimental results show that sonic-chemical treatment is an effective technology for the improvement of the microstructure of porous silicon, and the luminescent efficiency and stability thereof. Luminescent porous silicon films, prepared by ultrasonic-enhanced anode electrochemical etching, display better qualities than the samples prepared by conventional methods widely used at present. This ultrasonic-chemical effect roots ...