中国物理B ›› 2023, Vol. 32 ›› Issue (3): 38101-038101.doi: 10.1088/1674-1056/ac7f8a
Li-Cai Hao(郝礼才)1, Zi-Ang Chen(陈子昂)2,3, Dong-Yang Liu(刘东阳)2,3, Wei-Kang Zhao(赵伟康)2,3, Ming Zhang(张鸣)2,3, Kun Tang(汤琨)2,3,†, Shun-Ming Zhu(朱顺明)2,3, Jian-Dong Ye(叶建东)2,3, Rong Zhang(张荣)2,3, You-Dou Zheng(郑有炓)2,3, and Shu-Lin Gu(顾书林)2,3,‡
Li-Cai Hao(郝礼才)1, Zi-Ang Chen(陈子昂)2,3, Dong-Yang Liu(刘东阳)2,3, Wei-Kang Zhao(赵伟康)2,3, Ming Zhang(张鸣)2,3, Kun Tang(汤琨)2,3,†, Shun-Ming Zhu(朱顺明)2,3, Jian-Dong Ye(叶建东)2,3, Rong Zhang(张荣)2,3, You-Dou Zheng(郑有炓)2,3, and Shu-Lin Gu(顾书林)2,3,‡
摘要: This work investigates the suppression and compensation effect of oxygen on the behaviors and characteristics of heavily boron-doped microwave plasma chemical vapor deposition (MPCVD) diamond films. The suppression effect of oxygen on boron incorporation is observed by an improvement in crystal quality when oxygen is added during the diamond doping process. A relatively low hole concentration is expected and verified by Hall effect measurements due to the compensation effect of oxygen as a deep donor in diamond. A low acceptor concentration, high compensation donor concentration and relatively larger acceptor ionization energy are then induced by the incorporation of oxygen; however, a heavily boron-doped diamond film with high crystal quality can also be expected. The formation of an oxygen-boron complex structure instead of oxygen substitution, as indicated by the results of x-ray photoelectron spectroscopy, is suggested to be more responsible for the observed enhanced compensation effect due to its predicted low formation energy. Meanwhile, density functional theory calculations show that the boron-oxygen complex structure is easily formed in diamond with a formation energy of -0.83 eV. This work provides a comprehensive understanding of oxygen compensation in heavily boron-doped diamond.
中图分类号: (Diamond)