例如,室温:KT0.026ev KT =0.026 当V=0.26V: gV ekt =es>1 J≈Jek1例如，室温：KT=0.026ev V q KT = 0.026 当V=0.26v ： 1 10 e = e  KT qv KT q v s J  J e V J Js