摘要
Polycrystalline diamond thin films are deposited on an n-type Si substrates by hot filament chemical vapor deposition,and then are implanted with boron ions in a 200keV ion implanter.In order to achieve a better distribution of the implanted element,boron ions are implanted by two steps:implanting boron ions with the energy of 70keV first,and then with the energy of 100keV.The homogeneous distribution of the B ion is gained.The current-voltage characteristics of the samples are studied.It is found that the p-n heterojunction effect is achieved in these samples.
在n型Si衬底上用热丝化学气相沉积方法制备了多晶金刚石膜,用200keV的离子注入机在金刚石膜中进行了二次硼离子注入,第一次注入能量为70keV,第二次注入能量为120keV,获得了硼离子的均匀分布,测试了样品的I-V特性,发现其具有明显的pn异质结效应.
基金
国家自然科学基金资助项目(批准号:50072045)~~
