n-type semiconductor Extra electron +4 +4 Si Si 少数载流子 :空穴 Phosphorus DoBor o 多数载流子 :电子 Si Si Si 渗入磷，电子增加 N型半导体 http://b(Negative)net/cyousui the holes are red and the Immovable positively charged center electrons are blue.n-type semiconductor Extra electron Phosphorus Donor the holes are red and the electrons are blue. Immovable positively charged center