Hav nyob ntawd! Raws li cov khoom siv graphite rau PV (photovoltaic) hlwb, kuv tau pom ua ntej yuav ua li cas cov khoom siv tsis txaus ntseeg no tuaj yeem muaj kev cuam tshuam loj rau cov neeg nqa khoom hauv PV hlwb. Hauv qhov blog no, kuv yuav rhuav tshem qhov kev thauj mus los yog dab tsi, cov khoom siv graphite tuaj rau hauv kev ua si, thiab vim li cas nws tseem ceeb rau kev ua haujlwm ntawm PV.
Carrier Mobility yog dab tsi?
Cia peb pib nrog cov hauv paus. Hauv PV hlwb, cov cab kuj yog qhov tseem ceeb ntawm tus nqi - nqa cov khoom, xws li electrons thiab qhov. Carrier mobility yog ib qho kev ntsuas ntawm qhov yooj yim npaum li cas cov cab kuj tuaj yeem txav los ntawm cov khoom siv thaum siv hluav taws xob. Xav txog nws zoo li lub tsheb ntawm txoj kev loj. Yog hais tias txoj kev loj yog qhov dav, du, thiab muaj ob peb yam teeb meem, tsheb (cov neeg nqa khoom) tuaj yeem txav tau sai thiab ywj pheej. Tab sis yog tias nws puv hauv qhov av thiab cov tsheb thauj mus los, cov tsheb yuav maj mam txav mus.
Kev txav mus los siab yog qhov tseem ceeb heev rau PV hlwb. Thaum cov neeg nqa khoom txav tau sai, lawv tuaj yeem ncav cuag cov electrodes ntawm PV cell sai dua. Qhov no txhais tau tias ntau electrons tuaj yeem sau tau, thiab hluav taws xob ntau tuaj yeem tsim tawm. Hauv lwm lo lus, kev thauj mus los zoo dua ua rau muaj kev ua tau zoo dua hauv PV hlwb, uas yog qhov loj hauv lub ntiaj teb lub zog tauj dua tshiab.
Yuav Ua Li Cas Graphite Material Influences Carrier Mobility
High Electrical Conductivity
Graphite yog qhov zoo - paub txog nws cov hluav taws xob conductivity siab. Nws muaj cov qauv tshwj xeeb uas cov pa roj carbon atom tau teeb tsa hauv txheej. Nyob rau hauv cov khaubncaws sab nraud povtseg no, cov pa roj carbon atoms txuas nrog cov ntaub ntawv muaj zog, thiab tseem muaj cov hluav taws xob delocalized uas tuaj yeem txav tau yooj yim. Cov delocalized electrons no yog dab tsi muab graphite nws zoo heev hluav taws xob conductivity.
Thaum graphite siv hauv PV hlwb, nws tuaj yeem ua txoj hauv kev rau cov neeg nqa khoom. Lub siab conductivity ntawm graphite tso cai rau cov neeg nqa khoom txav tau yooj yim dua los ntawm PV cell qauv. Nws zoo li ntxiv - txoj kab nrawm ntawm txoj kev loj. Piv txwv li, nyob rau hauv ib co PV cell tsim, graphite yuav siv tau raws li ib tug conductive txheej. Cov txheej no pab cov neeg nqa khoom txav nrawm ntawm lub teeb - absorbing txheej mus rau cov electrodes, txo cov kev pheej hmoo ntawm cov cab kuj recombining (uas yog phem rau efficiency).
Tsawg Kuj
Lwm qhov tseem ceeb yog qhov tsis kam ntawm graphite. Kev tawm tsam zoo li kev sib txhuam rau cov neeg nqa khoom. Qhov qis dua qhov tsis kam, cov khoom siv hluav taws xob tsawg poob thaum lawv txav mus los ntawm cov khoom siv. Graphite qhov kev tiv thaiv qis txhais tau hais tias cov neeg nqa khoom tuaj yeem txav mus nrog kev cuam tshuam tsawg dua.
Hauv PV hlwb, qhov no yog qhov tseem ceeb. Yog tias cov neeg nqa khoom poob lub zog ntau dhau vim muaj kev tiv thaiv siab, lawv yuav tsis muaj zog txaus kom ncav cuag cov electrodes thiab ua rau cov hluav taws xob tam sim no. Los ntawm kev siv cov khoom siv graphite, peb tuaj yeem txo qhov poob ntawm lub zog thiab ua kom cov neeg nqa khoom txav tau zoo. Piv txwv li, thaum graphite siv nyob rau hauv daim ntawv ntawm Graphite Cheebtsam, nws muaj peev xwm txo tau lub internal kuj ntawm PV cell, li no pab txhawb nqa nqa mus.
Interface Compatibility
Graphite kuj muaj qhov zoo sib xws nrog lwm cov ntaub ntawv uas feem ntau siv hauv PV hlwb. Hauv PV cell, muaj ntau txheej txheej ntawm cov khoom sib txawv, thiab cov neeg nqa khoom yuav tsum tau txav mus los ntawm cov kev sib tshuam no. Graphite tuaj yeem tsim kev sib txuas ruaj khov nrog cov ntaub ntawv zoo li silicon, uas yog cov khoom siv semiconductor tshaj plaws hauv PV hlwb.
Qhov kev sib raug zoo no pab txo qis kev cuam tshuam cuam tshuam uas cov neeg nqa khoom yuav ntsib. Thaum cov neeg nqa khoom ntsib teeb meem tsawg dua ntawm cov interfaces, lawv tuaj yeem txav mus los ntawm ib txheej mus rau lwm qhov. Piv txwv li, PECVD Graphite Boat feem ntau yog siv rau hauv cov txheej txheem ntawm PV hlwb. Lub nkoj graphite muab qhov chaw ruaj khov thiab sib haum rau kev tso tawm ntawm lwm cov ntaub ntawv, uas tuaj yeem muaj kev cuam tshuam zoo rau cov neeg nqa khoom txav mus rau hauv cov khoom kawg PV cell.
Tiag - Ntiaj Teb Daim Ntawv Thov thiab Cov txiaj ntsig
Kev ua haujlwm siab dua PV Cells
Kev cuam tshuam ntawm graphite ntawm cov neeg nqa khoom txav ncaj qha rau hauv kev ua haujlwm siab dua PV hlwb. Hauv kev ua lag luam, qhov twg txhua qhov feem pua ntawm kev txhim kho kev ua haujlwm tseem ceeb, siv cov khoom siv graphite tuaj yeem muab PV cell manufacturers muaj kev sib tw. Kev ua haujlwm siab dua txhais tau tias PV hlwb tuaj yeem hloov lub hnub ci ntau rau hauv hluav taws xob, uas yog qhov zoo rau ob qho tib si hauv tsev thiab kev lag luam hnub ci zog.
Tus nqi - Ua tau zoo
Graphite kuj muaj ntau thiab raug nqi - zoo piv rau lwm cov khoom siv siab -. Los ntawm kev siv graphite los txhim kho cov cab kuj, PV cell manufacturers tuaj yeem ua tiav kev ua tau zoo dua yam tsis tas yuav nce tus nqi ntau lawm. Qhov no ua rau lub hnub ci zog siv tau ntau dua thiab pheej yig rau cov neeg siv khoom.
Durability
Graphite kuj yog cov khoom siv ruaj khov. Nws tuaj yeem tiv taus qhov kub thiab txias ib puag ncig. Hauv PV hlwb, qhov ua tau ntev yog qhov tseem ceeb vim tias PV hlwb feem ntau raug tshav ntuj, tshav kub, thiab ntau yam huab cua. Lub sij hawm ntev - kev ruaj ntseg ntawm graphite xyuas kom meej tias cov cab kuj tseem nyob ib puag ncig ntawm lub neej ntawm PV cell, uas txhais tau hais tias PV cell tuaj yeem tswj tau nws cov txiaj ntsig tau ntev dua.
Vim Li Cas Xaiv Peb Cov Khoom Siv Graphite
Raws li tus neeg muag khoom ntawm cov khoom siv graphite rau PV, peb muab siab - cov khoom zoo graphite uas tau tsim tshwj xeeb rau kev lag luam PV. Peb Graphite Chuck yog precision - engineered los muab kev txhawb nqa zoo thiab conductivity nyob rau hauv PV cell manufacturing txheej txheem. Lub nkoj PECVD Graphite peb muab yog ua los ntawm siab - purity graphite, ua kom muaj qhov huv thiab ruaj khov rau cov khoom tso tawm. Thiab peb cov Graphite Cheebtsam yog tsim los kom haum seamlessly rau hauv txawv PV cell designs, optimizing carrier mus thiab tag nrho cov cell ua tau zoo.
Yog tias koj nyob hauv PV cell manufacturing lag luam thiab nrhiav kev txhim kho cov cab kuj thiab kev ua haujlwm ntawm koj cov khoom, peb xav nrog koj tham. Txawm hais tias koj muaj lus nug txog peb cov khoom lag luam graphite lossis xav tham txog kev daws teeb meem rau koj cov kev xav tau tshwj xeeb, tsis txhob yig tiv tauj. Cia peb ua haujlwm ua ke coj koj PV kev ua haujlwm ntawm tes mus rau qib tom ntej.
Cov ntaub ntawv
Sze, SM, & Ng, KK (2007). Physics ntawm Semiconductor Devices. Wiley - Interscience.
Dresselhaus, MS, Dresselhaus, G., & Eklund, PC (1996). Kev tshawb fawb ntawm Fullerenes thiab Carbon Nanotubes. Academic Press.