p-type semiconductor hole Si B Si +4 +4 多数载流子 Boron :空穴 Acceptor +3 少数载流子 :电子 Si Si Si 渗入硼，空穴增加 P型半导体 http:b(Positive) net/cyousui the holes are red and the Immovable negatively charged center electrons are blue
p-type semiconductor hole Boron Acceptor the holes are red and the electrons are blue. Immovable negatively charged center
p-type +n-type hole Extra electron 0 Si B Si ; Si 0 P Si : p-region, 0 0 。 n-region 0 Si Si Si Si Si 0 Si 0 PN结 扩散
hole Extra electron p-type +n-type p-region n-region
p-type n-type hole Extra electron Si B Si Si Si p-region p-region 0 0 Si Si Si Si Si Si PN转 正向偏置 P
hole Extra electron p-type + n-type p-region p-region
p-type n-type hole Extra electron 、00 0 Si B Si Si 0 Si 0 0 0 Si Si Si 0 Si Si 0 Si 0 PN结 反向偏置 P ●●●● htt b反向电压使内电场增强
hole Extra electron p -type + n -type
p-n junction If the p-type semiconductor and the n-type semiconductor are closely combined and integrated,the transition region between two semiconductors of opposite conductivity types is called a p-n junction.On both sides of the p-n junction,since there are many holes and few electrons in the p-type region, there are many electrons and few holes in the n-type region.Since the concentrations of electrons and holes are not equal on both sides of the interface,a diffusion motion of majority carriers occurs. Ionization acceptor electric field E p-type n-type semiconductor semiconductor L lonization donor DaceclhargeregIon Diffusion
If the p-type semiconductor and the n-type semiconductor are closely combined and integrated, the transition region between two semiconductors of opposite conductivity types is called a p-n junction. On both sides of the p-n junction, since there are many holes and few electrons in the p-type region, there are many electrons and few holes in the n-type region. Since the concentrations of electrons and holes are not equal on both sides of the interface, a diffusion motion of majority carriers occurs. p-n junction p-type semiconductor － － － － － － － － － － － － － － － － － － － － － － － － + + + + + + + + + + + + + + + + + + + + + + + + Diffusion electric field E Space charge region n-type semiconductor Ionization acceptor Ionization donor