Dopants yog impurities, yog li, cov tshuaj muaj pes tsawg leeg hloov pauv los ntawm doping. … Cov xeev ntiav muaj me me ionisation zog; thiab, thaum lub doping ceev yog siab, lub dopant xeev tsim ib tug band. Yog cov qhab no nyob ze ze rau qhov valence lossis conduction band edge, band-gap yuav txo.
Vim li cas qhov sib txawv band txo?
Lub zog sib txawv ntawm cov khoom siv hluav taws xob zoo li txo qis nrog nce kub. Thaum kub nce, qhov amplitude ntawm atomic vibrations nce, ua rau loj dua interatomic spacing.
Dab tsi yog qhov cuam tshuam ntawm doping ntawm qhov sib txawv band?
Vim tias qhov sib txawv ntawm qhov sib txawv me me rau cov khoom siv semiconductors, doping nrog me me ntawm impurities tuaj yeem ua rau cov khoom siv hluav taws xob nce ntxiv. Doping, yog li ntawd, tso cai rau cov kws tshawb fawb los siv cov khoom ntawm cov khoom siv hu ua "dopants" txhawm rau hloov kho cov conductivity ntawm ib qho semiconductor.
Yuav ua li cas thaum qhov sib txawv band txo?
Cov txiaj ntsig tau pom tias qhov sib txawv ntawm lub zog nce ntxiv nrog qhov txo qis me me. … Vim yog kev kaw ntawm cov hluav taws xob thiab qhov, qhov sib txawv ntawm lub zog nce ntawm valence band thiab cov conduction band nrog txo qhov me me.
Lub zog sib txawv li cas nrog doping?
Thaum ib qho khoom siv hauv nruab nrab yog doped nrog impurity atoms ntawm valence tsib xws li As, P lossis Sb, qee qhov ntxivlub zog theem yog tsim, qhov teeb meem nyob rau hauv lub zog sib txawv me ntsis hauv qab lub conduction band uas yog hu ua pub zog qib. Vim nws, lub zog sib txawv hauv semiconductor decreses.
