机构地区: 南京大学物理学院物理学系
出 处: 《固体电子学研究与进展》 2002年第4期381-384,共4页
摘 要: 研究了调制掺杂 Alx Ga1 - x N/Ga N表面 Pt肖特基接触的制备工艺 ,并对其进行了 I-V测量。通过改变对样品表面的处理工艺 ,研究了表面处理对调制掺杂 Alx Ga1 - x N/Ga N表面 Pt肖特基结接触特性的影响 ,在 n型掺杂浓度为 7.5× 1 0 1 7cm- 3的 Al0 .2 2 Ga0 .78N样品表面 ,制备得到了势垒高度为 0 .94e V、理想因子为 1 .4的 Pt肖特基接触。这与国外报道的结果接近 (=1 .2 e V,n=1 .1 1 [1 ] ) Pt Schottky contacts were fabricated based on modulation doped Al 0.22 Ga 0.78 N/GaN heterostructures and investigated by means of Schottky I V measurement. Also different pre deposition surface treatments were made and found to be crucial to the performance of Schottky contacts based on Al x Ga 1- x N/GaN heterostructures. Pt Schottky contacts with the highest barrier height of 0.94 eV and the smallest ideal factor of 1.4 were obtained in our experiments.
领 域: [电子电信]