Hav nyob ntawd! Kuv yog tus xa khoom ntawm cov khoom siv graphite rau PV. Niaj hnub no, kuv xav kom muaj kev sib tham txog seb cov khoom siv graphite puas haum nrog PV technologies sib txawv.
Ua ntej tshaj, cia peb tau txais me ntsis keeb kwm ntawm PV thev naus laus zis. Muaj ob hom: crystalline silicon (c - Si) PV thiab nyias - zaj duab xis PV. Crystalline silicon ntxiv muab faib ua monocrystalline thiab polycrystalline silicon. Cov no yog cov siv PV thev naus laus zis ntau tshaj plaws nyob rau tam sim no, suav rau ib qho loj loj ntawm lub hnub ci kev lag luam. Nyias - zaj duab xis PV, ntawm qhov tod tes, suav nrog cov thev naus laus zis xws li cadmium telluride (CdTe), tooj liab indium gallium selenide (CIGS), thiab amorphous silicon (a - Si).
Yog li, vim li cas graphite? Graphite yog ib qho khoom siv zoo heev. Nws muaj cov thermal conductivity siab, uas txhais tau hais tias nws tuaj yeem hloov cov cua sov zoo heev. Nws kuj tseem tiv taus qhov kub thiab txias thiab muaj zog txhua yam zoo. Cov khoom no ua rau nws yog tus neeg sib tw zoo tshaj plaws rau kev siv hauv PV kev tsim khoom.
Cia peb pib nrog yuav ua li cas cov khoom siv graphite haum nrog crystalline silicon PV. Hauv kev tsim cov crystalline silicon wafers, siab - cov txheej txheem kub tau koom nrog. Piv txwv li, Czochralski txoj kev yog siv los loj hlob monocrystalline silicon ingots. Thaum lub sijhawm txheej txheem no, silicon yog yaj ntawm qhov kub thiab txias heev. Graphite Cheebtsam yog siv nyob rau hauv crucibles thiab cua sov. Lub siab thermal conductivity ntawm graphite pab tswj qhov kub thiab txias tsis sib xws hauv lub crucible, uas yog qhov tseem ceeb rau kev loj hlob siab - silicon crystals. Koj tuaj yeem tshawb xyuas ntau ntxiv txog cov Graphite Cheebtsam.
Hauv wafer - cov txheej txheem txiav, graphite chucks yog siv los tuav cov silicon wafers khov kho. Lub Graphite Chuck muab lub platform ruaj khov rau kev ua haujlwm txiav. Nws lub zog txhua yam ua kom ntseeg tau tias nws tuaj yeem tiv taus lub zog siv thaum txiav yam tsis muaj deforming. Qhov no yuav pab kom ua tiav cov txiav txiav thiab txo tus nqi tawg ntawm cov wafers, uas thaum kawg txhim kho kev ua haujlwm ntawm tag nrho.
Tam sim no, cia peb mus rau nyias - zaj duab xis PV yees. Hauv CdTe nyias - zaj duab xis PV ntau lawm, txheej txheem deposition tshwm sim ntawm qhov kub thiab txias. Graphite puag susceptors yog siv los txhawb lub substrate thaum lub sij hawm deposition. Cov Graphite Base Susceptors tuaj yeem tiv taus qhov kub siab - ib puag ncig thiab muab lub tiaj tiaj thiab ruaj khov rau qhov tso tawm ntawm nyias - zaj duab xis txheej. Qhov no yog qhov tseem ceeb vim tias qhov tsis sib xws hauv cov substrate tuaj yeem ua rau muaj qhov tsis xws luag hauv cov qauv ntawm zaj duab xis nyias -, uas tuaj yeem cuam tshuam rau kev ua haujlwm ntawm PV hlwb.
Rau CIGS nyias - zaj duab xis PV, multi-theem co- evaporation lossis sputtering txheej txheem kuj yuav tsum muaj cov khoom ruaj khov thiab kub - resistant. Graphite cov khoom ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov khoom siv hauv cov txheej txheem no. Nws tuaj yeem pab tswj xyuas qhov kub thiab ib puag ncig kom tsim nyog ntawm CIGS txheej.
Tab sis, puas muaj kev sib tw? Zoo, muaj ob peb. Ib qho ntawm cov teeb meem tseem ceeb yog lub peev xwm rau graphite kom hnov mob nrog qee cov ntaub ntawv siv hauv PV ntau lawm. Piv txwv li, hauv qee qhov kev kub siab -, graphite yuav hnov mob nrog cov pa oxygen lossis lwm cov pa roj reactive, uas tuaj yeem ua rau tsim cov khoom sib txuas tsis xav tau. Txawm li cas los xij, los ntawm kev siv cov txheej txheem tsim nyog thiab kev tiv thaiv huab cua, peb tuaj yeem txo cov kev cuam tshuam no.
Lwm qhov yog tus nqi. Cov ntaub ntawv graphite tuaj yeem pheej yig dua piv rau qee yam khoom siv. Tab sis thaum koj xav txog qhov ntev - cov txiaj ntsig ntawm kev txhim kho kev tsim khoom zoo, txo cov khib nyiab, thiab ua kom muaj txiaj ntsig zoo, kev nqis peev hauv cov khoom siv graphite tuaj yeem them nyiaj.
Ntxiv nrog rau cov txheej txheem tsim khoom, graphite tseem muaj peev xwm siv tau hauv kev ua haujlwm thiab kev saib xyuas ntawm PV systems. Piv txwv li, graphite tuaj yeem siv rau hauv cov dab dej kub rau PV inverters. Lub siab thermal conductivity ntawm graphite pab nyob rau hauv dissipating tshav kub generated los ntawm lub inverters, uas yuav txhim kho lawv cov kev ua tau zoo thiab lifespan.
Yog li, txhawm rau suav nws, cov khoom siv graphite yog qhov sib xws nrog ntau yam PV thev naus laus zis. Nws cov khoom tshwj xeeb ua rau nws yog ib feem tseem ceeb ntawm PV tsim cov txheej txheem, los ntawm kev loj hlob ntawm silicon crystals mus rau nyias nyias - zaj duab xis txheej. Txawm hais tias nws yog crystalline silicon lossis nyias - zaj duab xis PV, graphite Cheebtsam ua lub luag haujlwm tseem ceeb hauv kev ua kom siab - kev tsim khoom zoo thiab ua haujlwm tau zoo.
Yog tias koj nyob hauv PV kev lag luam thiab nrhiav siab - cov ntaub ntawv graphite zoo rau koj cov txheej txheem tsim khoom, peb nyob ntawm no los pab. Peb muaj ntau yam khoom siv graphite uas tau tsim los ua kom tau raws li cov kev xav tau tshwj xeeb ntawm PV technologies sib txawv. Tiv tauj peb kom muaj kev sib tham ntxaws txog yuav ua li cas peb cov ntaub ntawv graphite tuaj yeem txhim kho koj cov khoom siv PV thiab pab koj kom muaj kev sib tw hauv kev ua lag luam.
Cov ntaub ntawv
"Photovoltaic Science thiab Engineering" los ntawm Antonio Luque thiab Steven Hegedus
"Thin - Film Solar Cells: Fabrication, Characterization, and Applications" los ntawm John Wiley & Sons