Polycrystalline silicon

Polycrystalline silicon yog ib daim ntawv ntawm elemental silicon.Thaum molten elemental silicon solidifies hauv qab
supercooling tej yam kev mob, cov silicon atoms yog teem nyob rau hauv daim ntawv ntawm ib tug pob zeb diamond lattice rau ntau yam
siv lead ua nuclei.Yog hais tias cov siv lead ua nuclei loj hlob mus rau hauv cov khoom siv lead ua nrog cov qauv siv lead ua sib txawv, cov no
Crystal nplej ua ke los ua polycrystalline silicon..Kev siv tus nqi: Txoj kev loj hlob ntawm hnub ci
hlwb tuaj yeem pom los ntawm cov txheej txheem kev loj hlob tam sim no ntawm cov hnub ci thoob ntiaj teb.

Polycrystalline silicon tuaj yeem siv los ua raw khoom rau rub ib leeg siv lead ua silicon.Qhov txawv ntawm
polycrystalline silicon thiab ib qho siv lead ua silicon feem ntau yog tshwm sim hauv lub cev.Piv txwv li,
lub anisotropy ntawm txhua yam khoom, kho qhov muag khoom thiab thermal zog yog deb tsawg pom tseeb dua
uas yog ib qho siv lead ua silicon;Nyob rau hauv cov nqe lus ntawm hluav taws xob khoom, conductivity ntawm polycrystalline silicon
Crystal kuj tseem tsis tshua muaj txiaj ntsig ntau dua li ntawm ib qho siv lead ua silicon, thiab txawm tias yuav luag tsis muaj qhov cuam tshuam.
Hais txog kev ua tshuaj lom neeg, qhov sib txawv ntawm ob yog tsawg.Polycrystalline silicon thiab
monocrystalline silicon tuaj yeem paub qhov txawv ntawm lawv cov tsos, tab sis qhov kev txheeb xyuas tiag tiag xav tau
tsom xam los txiav txim siab lub dav hlau siv lead ua, hom conductivity thiab resistivity ntawm cov siv lead ua.