Qhov sib txawv tseem ceeb ntawm N-hom thiab P-hom monocrystalline silicon wafers rau hnub ci photovoltaic
Qhov sib txawv tseem ceeb ntawm N-hom thiab P-hom monocrystalline silicon wafers rau hnub ci photovoltaics
Monocrystalline silicon wafers muaj lub cev muaj zog ntawm quasi-hlau, nrog tsis muaj zog conductivity, thiab lawv cov conductivity nce nrog nce kub. Lawv kuj muaj cov khoom tseem ceeb semiconducting. Los ntawm doping ultra-ntshiab monocrystalline silicon wafers nrog me me ntawm boron, cov conductivity tuaj yeem nce ntxiv los ua P-hom silicon semiconductor. Ib yam li ntawd, doping nrog me me ntawm phosphorus los yog arsenic tuaj yeem ua rau kom muaj zog, tsim N-hom silicon semiconductor. Yog li, dab tsi yog qhov txawv ntawm P-hom thiab N-hom silicon wafers?
Qhov sib txawv tseem ceeb ntawm P-hom thiab N-hom monocrystalline silicon wafers yog raws li nram no:
Dopant: Hauv monocrystalline silicon, doping nrog phosphorus ua rau nws N-hom, thiab doping nrog boron ua rau nws P-hom.
Conductivity: N-hom yog electron-ua, thiab P-hom yog qhov ua.
Kev ua tau zoo: Cov phosphorus ntau dua yog doped rau hauv N-hom, ntau cov hluav taws xob dawb muaj, qhov muaj zog ntawm cov conductivity, thiab qis dua qhov kev tiv thaiv. Qhov ntau boron yog doped rau hauv P-hom, qhov ntau qhov yog tsim los ntawm kev hloov silicon, qhov muaj zog ntawm cov conductivity, thiab qhov qis dua.
Tam sim no, P-hom silicon wafers yog cov khoom tseem ceeb hauv kev lag luam photovoltaic. P-hom silicon wafers yog yooj yim los tsim thiab muaj nqi tsawg. N-hom silicon wafers feem ntau muaj cov neeg nqa khoom tsawg dua lub neej, thiab kev ua haujlwm ntawm lub hnub ci tuaj yeem ua kom siab dua, tab sis cov txheej txheem nyuaj dua. N-hom silicon wafers yog doped nrog phosphorus, uas tsis zoo solubility nrog silicon. Thaum lub sij hawm kos duab, phosphorus tsis sib npaug. P-hom silicon wafers yog doped nrog boron, uas muaj ib tug zoo xws li sib cais coefficient rau silicon, thiab cov uniformity ntawm dispersion yog yooj yim los tswj.