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2章半导体中杂质和缺陷 - Nankai University

2 ( ) ( ) 103cm-2 105 1 B 103 1 2 III V (Li+) 2 2 ND V (P+), ( ) n V n Si Ge V Si Ge ED ED ( NA) EA p Si Ge III Si In Ge EA 3 3

2.1 硅锗晶体中的杂质能级 原子并非在格点上静止不动,而是在平衡位置附近振动; 材料不是绝对纯净,含若干杂质(外来的); 半导体晶格不是绝对完美,存在缺陷(内在的) 实际晶体与理想本征晶体的区别 缺陷分类: 点缺陷(空位,间隙原子) 线缺陷(位错)

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