Qhov sib txawv ntawm polysilicon thiab monocrystalline silicon

Cov khoom siv silicone yog cov khoom siv tseem ceeb tshaj plaws thiab cov khoom tseem ceeb hauv kev lag luam semiconductor. Cov txheej txheem ntau lawm ntawm semiconductor kev lag luam saw yuav tsum pib los ntawm kev tsim cov khoom siv silicon yooj yim.

Monocrystalline silicon solar vaj lub teeb

Monocrystalline silicon yog ib daim ntawv ntawm elemental silicon. Thaum molten elemental silicon solidifies, silicon atoms yog teem nyob rau hauv pob zeb diamond lattice rau hauv ntau siv lead ua nuclei. Yog tias cov pob zeb siv lead ua no loj hlob mus rau hauv cov nplej nrog tib txoj kev taw qhia ntawm lub dav hlau siv lead ua, cov nplej no yuav muab sib xyaw ua ke kom crystallize rau hauv monocrystalline silicon.

Monocrystalline silicon muaj lub cev muaj zog ntawm quasi-hlau thiab muaj zog hluav taws xob conductivity, uas nce nrog nce kub. Nyob rau tib lub sijhawm, monocrystalline silicon tseem muaj qhov tseem ceeb ntawm cov hluav taws xob hluav taws xob. Ultra-ntshiab monocrystalline silicon yog ib qho khoom siv hauv nruab nrab. Lub conductivity ntawm ultra-ntshiab monocrystal silicon tuaj yeem txhim kho los ntawm kev ntxiv cov kab ⅢA (xws li boron), thiab P-hom silicon semiconductor tuaj yeem tsim. Xws li qhov sib ntxiv ntawm cov kab ⅤA cov ntsiab lus (xws li phosphorus lossis arsenic) tuaj yeem txhim kho cov qib ntawm kev coj ua, tsim N-hom silicon semiconductor.

polysiliconhnub ci teeb

Polysilicon yog ib daim ntawv ntawm elemental silicon. Thaum molten elemental silicon solidifies nyob rau hauv cov xwm txheej ntawm supercooling, silicon atoms tau teem rau hauv ntau cov siv lead ua nuclei nyob rau hauv daim ntawv ntawm pob zeb diamond lattice. Yog tias cov pob zeb siv lead ua no loj hlob mus rau hauv cov nplej uas muaj kev sib txawv siv lead ua, cov nplej no ua ke thiab crystallize rau hauv polysilicon. Nws txawv ntawm monocrystalline silicon, uas yog siv nyob rau hauv electronics thiab solar cells, thiab los ntawm amorphous silicon, uas yog siv nyob rau hauv cov khoom siv nyias nyias thiabsolar cells vaj teeb

Qhov sib txawv thiab kev sib txuas ntawm ob

Nyob rau hauv monocrystalline silicon, cov qauv siv lead ua thav duab zoo ib yam thiab tuaj yeem txheeb xyuas los ntawm cov tsos sab nraud. Hauv monocrystalline silicon, siv lead ua lattice ntawm tag nrho cov qauv yog tas mus li thiab tsis muaj ib thaj tsam ntawm cov nplej. Cov pob zeb loj loj yog qhov tsis tshua muaj nyob hauv cov xwm txheej thiab nyuaj ua rau hauv chav kuaj (saib recrystallization). Hauv qhov sib piv, cov haujlwm ntawm atoms hauv cov qauv amorphous raug txwv rau kev txiav txim luv luv.

Polycrystalline thiab subcrystalline theem muaj ntau ntawm cov muaju me me los yog microcrystals. Polysilicon yog cov khoom tsim los ntawm ntau cov pob zeb me me silicon. Polycrystalline hlwb tuaj yeem paub kev ntxhib los mos los ntawm cov ntawv hlau pom. Cov qib semiconductor suav nrog hnub ci qib polysilicon hloov mus rau monocrystalline silicon, txhais tau hais tias cov khoom siv sib txuas sib txuas hauv cov polysilicon tau hloov mus rau hauv ib qho loj siv lead ua. Monocrystalline silicon yog siv los ua cov khoom siv silicon-based microelectronic feem ntau. Polysilicon tuaj yeem ua tiav 99.9999% purity. Ultra-ntshiab polysilicon kuj tseem siv rau hauv kev lag luam semiconductor, xws li 2 - mus rau 3-meter ntev polysilicon rods. Hauv kev lag luam microelectronics, polysilicon muaj cov ntawv thov ntawm ob qho tib si macro thiab micro nplai. Cov txheej txheem ntau lawm ntawm monocrystalline silicon suav nrog cov txheej txheem Czeckorasky, cheeb tsam melting thiab Bridgman txheej txheem.

Qhov sib txawv ntawm polysilicon thiab monocrystalline silicon feem ntau tshwm sim hauv lub cev. Nyob rau hauv cov nqe lus ntawm txhua yam thiab hluav taws xob zog, polysilicon yog inferior rau monocrystalline silicon. Polysilicon tuaj yeem siv los ua raw khoom rau kev kos duab monocrystalline silicon.

1. Nyob rau hauv cov nqe lus ntawm anisotropy ntawm txhua yam khoom, optical zog thiab thermal zog, nws yog deb tsawg pom tseeb tshaj li monocrystalline silicon.

2. Raws li cov khoom siv hluav taws xob, cov hluav taws xob conductivity ntawm polycrystalline silicon yog qhov tseem ceeb tshaj li ntawm monocrystalline silicon, lossis txawm tias yuav luag tsis muaj hluav taws xob conductivity.

3, hais txog kev siv tshuaj lom neeg, qhov sib txawv ntawm ob yog me me, feem ntau siv polysilicon ntau dua