Video: Yuav ua li cas conductivity ntawm ib tug semiconductor hloov nrog kub?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum koj nce tus kub ntawm semiconductor cov electrons yuav tau txais ntau zog, yog li ntawd lawv tau txais lawv tus kheej tawm ntawm daim ntawv cog lus, thiab li no lawv ua dawb. ASyou nce tus kub ntau, ntau tus xov tooj ntawm theelectronics yuav dawb, thiab li no cov conductivity nce.
Nyob rau hauv tas li ntawd, yuav ua li cas conductivity ntawm ib tug semiconductor hloov nrog nce nyob rau hauv kub?
Electrons nyob rau hauv semiconductor uas ua tsis muaj zog txaus tsis tuaj yeem pab txhawb rau qhov conductivity . Nce hauv kub nce lub lattice vibrations uas cuam tshuam kev txav / ntws ntawm electrons (kuj nce ).
Tsis tas li ntawd, qhov kev sib raug zoo ntawm qhov kub thiab txias yog dab tsi? Nyob rau hauv cov ntaub ntawv no ntawm semiconductors li lub kub tsub kom cov electrons nyob rau hauv lub valence band tau zoo siab thiab dhia mus rau hauv lub conduction band thiab li no cov conductance nce nyob rau hauv lub dwindling ntawm kuj. conductivity nce thiab resistivity, lub reciprocal ntawm conductivity txo.
Dab tsi yog qhov cuam tshuam ntawm qhov kub thiab txias ntawm tus neeg xyuas pib?
Raws li cov conductivity ntawm qhov kev daws teeb meem yog nyob ntawm cov yam ntxwv no ces qhov nce hauv qhov kev daws teeb meem kub yuav ua rau muaj kev nce hauv nws conductivity . Rau hlau tus thawj coj , qhov tsis kam ntawm tag nrho cov ntaub ntawv ntshiab nce linearly nrog kub dhau ib qhov txwv ntawm kub.
Yuav ua li cas tiv thaiv qhov kub thiab txias?
Cov nyhuv ntawm tshav kub ntawm lub atomic qauv ntawm ib tug materialis yuav ua rau lub atoms vibrate, thiab lub siab dua kub qhov hnyav dua cov atoms vibrate. Nyob rau hauv ib qho khoom siv qhov twg tsis kam TSHIAB nrog ib nce hauv kub , cov khoom yog hais tias muaj POSITIVE KEV KUB COEFFICIENT.
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