Umahluko phakathi kwe-polysilicon kunye ne-monocrystalline silicon

Izinto zesilicon zezona zinto zisisiseko neziphambili kushishino lwe-semiconductor. Inkqubo yokuvelisa eyinkimbinkimbi yekhonkco loshishino lwe-semiconductor kufuneka iqale ekuveliseni izinto zesilicon ezisisiseko.

Isibane segadi yelanga se-silicon esinombala ocwebezelayo

I-silicon e-monocrystalline luhlobo lwe-silicon e-elemental. Xa i-silicon e-melted elemental iqina, ii-athomu ze-silicon zicwangciswa kwi-lattice yedayimani zibe zii-nuclei ezininzi ze-crystal. Ukuba ezi nuclei ze-crystal zikhula zibe ziinkozo ezine-orientation efanayo ye-crystal plane, ezi nkozo ziya kuhlanganiswa ngaxeshanye ukuze zi-crystal zibe yi-silicon e-monocrystalline.

I-silicon e-monocrystalline ineempawu ezibonakalayo ze-quasi-metal kwaye inombane obuthathaka, onyukayo xa ubushushu busanda. Kwangaxeshanye, i-silicon e-monocrystalline ikwanawo nombane obonakalayo ophakathi. I-silicon e-monocrystalline e-Ultra-pure yi-semiconductor yangaphakathi. Umbane we-silicon e-monocrystalline e-ultra-pure unokuphuculwa ngokongeza izinto ze-trace ⅢA (ezifana ne-boron), kwaye i-silicon semiconductor ye-P-type inokwakheka. Njengokongezwa kwezinto ze-trace ⅤA (ezifana ne-phosphorus okanye i-arsenic) kunokuphucula nomgangatho wombane, ukwakheka kwe-silicon semiconductor ye-N-type.

i-polysiliconukukhanya kwelanga

I-Polysilicon luhlobo lwe-silicon ye-elemental. Xa i-silicon ye-elemental enyibilikisiweyo iqina phantsi kwemeko ye-supercooling, ii-athomu ze-silicon zicwangciswa zibe zii-nuclei ezininzi ze-crystal ngendlela ye-lattice yedayimani. Ukuba ezi nuclei ze-crystal zikhula zibe ziinkozo ezine-orientation eyahlukileyo ye-crystal, ezi nkozo ziyadibana kwaye zi-crystallize zibe yi-polysilicon. Yahlukile kwi-silicon ye-monocrystalline, esetyenziswa kwii-electronics nakwii-solar cells, nakwi-silicon e-amorphous, esetyenziswa kwizixhobo ze-thin-film kunyeisibane segadi seeseli zelanga

Umahluko kunye nonxibelelwano phakathi kwezi zimbini

Kwi-silicon e-monocrystalline, ulwakhiwo lwesakhelo sekristale luyafana kwaye lunokubonwa ngembonakalo yangaphandle efanayo. Kwi-silicon e-monocrystalline, i-crystal lattice yesampuli yonke iyaqhubeka kwaye ayinamida yeenkozo. Iikristale ezinkulu ezi-single zinqabile kakhulu ngokwendalo kwaye kunzima ukuzenza kwilebhu (jonga i-recrystallization). Ngokwahlukileyo koko, izikhundla zeeathomu kwizakhiwo ezi-amorphous zikhawulelwe kulandelelwano olufutshane.

Izigaba zePolycrystalline kunye ne-subcrystalline ziquka inani elikhulu leekristale ezincinci okanye ii-microcrystals. I-Polysilicon yinto eyenziwe ziikristale ezininzi ezincinci ze-silicon. Iiseli zePolycrystalline zinokubona ubume ngesiphumo esibonakalayo sesinyithi sephepha. Amanqanaba e-semiconductor kuquka i-polysilicon yenqanaba lelanga aguqulwa abe yi-monocrystalline silicon, oko kuthetha ukuba iikristale eziqhagamshelwe ngokungacwangciswanga kwi-polysilicon ziguqulwa zibe yikristale enkulu enye. I-Monocrystalline silicon isetyenziselwa ukwenza uninzi lwezixhobo ze-microelectronic ezisekelwe kwi-silicon. I-Polysilicon inokufikelela kubumsulwa obuyi-99.9999%. I-Ultra-pure polysilicon ikwasetyenziswa kushishino lwe-semiconductor, njengee-polysilicon rods ezi-2 ukuya kwezi-3 ubude. Kushishino lwe-microelectronics, i-polysilicon inezicelo kuzo zombini ii-macro kunye nee-micro scales. Iinkqubo zemveliso ye-monocrystalline silicon ziquka inkqubo yeCzeckorasky, ukunyibilika kwendawo kunye nenkqubo yeBridgman.

Umahluko phakathi kwe-polysilicon kunye ne-monocrystalline silicon ubonakala kakhulu kwiimpawu zomzimba. Ngokweempawu zoomatshini nezombane, i-polysilicon ingaphantsi kune-monocrystalline silicon. I-Polysilicon ingasetyenziselwa njengezinto zokwenza i-monocrystalline silicon.

1. Ngokuphathelele i-anisotropy yeempawu zoomatshini, iimpawu ze-optical kunye neempawu ze-thermal, ayibonakali kangako kune-silicon ye-monocrystalline

2. Ngokweempawu zombane, ukuhanjiswa kombane kwe-polycrystalline silicon akubalulekanga kangako kune-monocrystalline silicon, okanye phantse akukho ukuhanjiswa kombane.

3, ngokubhekiselele kwimisebenzi yeekhemikhali, umahluko phakathi kwezi zimbini mncinci kakhulu, ngokubanzi kusetyenziswa i-polysilicon ngaphezulu