Semiconductors yog lub hauv paus ntawm cov khoom siv hluav taws xob niaj hnub, ua txhua yam los ntawm smartphones mus rau supercomputers. Kev ua tau zoo ntawm cov khoom siv hluav taws xob feem ntau yog txiav txim siab los ntawm nws txoj kev txav mus los, uas yog hais txog lub peev xwm ntawm cov khoom thauj khoom (electrons lossis qhov) txav los ntawm cov khoom siv los ntawm kev cuam tshuam ntawm hluav taws xob. Raws li tus neeg muag khoom ntawm graphite semiconductor khoom, Kuv feem ntau nug seb graphite semiconductor kev txav mus los piv rau lwm cov semiconductors li cas. Nyob rau hauv no blog ncej, kuv yuav delve rau hauv lub ntsiab lus no, tshawb txog cov khoom tshwj xeeb ntawm graphite semiconductors thiab yuav ua li cas lawv pawg tiv thaiv ntau cov khoom siv semiconductor.
Nkag siab txog Mobility hauv Semiconductors
Ua ntej peb piv graphite semiconductors rau lwm tus, nws yog ib qho tseem ceeb kom nkag siab tias kev txav mus los txhais tau li cas thiab vim li cas nws tseem ceeb. Mobility yog ib qho kev ntsuas ntawm qhov ceev ceev cov cab kuj tuaj yeem txav mus rau hauv cov khoom siv semiconductor. Kev txav chaw siab dua feem ntau txhais tau tias ua haujlwm nrawm dua thiab siv hluav taws xob qis dua hauv cov khoom siv hluav taws xob. Qhov no yog vim hais tias electrons los yog qhov tuaj yeem taug kev sai dua los ntawm cov khoom siv, tso cai rau kev ua haujlwm sai dua thiab txo lub zog poob vim qhov tsis kam.
Kev txav mus los ntawm semiconductor yog cuam tshuam los ntawm ntau yam, nrog rau cov qauv siv lead ua ntawm cov khoom, muaj impurities, thiab qhov kub thiab txias. Piv txwv li, cov ntaub ntawv uas muaj cov qauv siv lead ua ntau dua yuav muaj kev txav mus los ntau dua vim tias muaj kev cuam tshuam tsawg dua rau cov neeg nqa khoom yuav ntsib. Cov impurities tuaj yeem tawg cov neeg nqa khoom, txo lawv txoj kev txav mus los, thaum qhov kub siab dua tuaj yeem ua rau cov thermal txav ntawm atoms, kuj ua rau tawg ntau dua thiab qis dua.
Mobility ntawm Traditional Semiconductors
Silicon yog cov khoom siv semiconductor siv dav tshaj plaws hauv kev lag luam hluav taws xob. Nws muaj kev txav mus los tau zoo rau ob qho tib si electrons thiab qhov, uas tau ua rau nws cov khoom ntawm kev xaiv rau kev tsim khoom sib xyaw ua ke. Kev txav hluav taws xob hauv silicon yog nyob ib puag ncig 1,400 cm² / Vs, thaum lub qhov txav mus los yog kwv yees li 450 cm² / Vs ntawm chav tsev kub. Cov txiaj ntsig no tau tso cai rau silicon- cov khoom siv raws li kev ua tau zoo thiab kev ntseeg tau ntau xyoo dhau los.
Gallium arsenide (GaAs) yog lwm qhov zoo -paub cov khoom siv semiconductor. Nws muaj ntau dua electron zog tshaj silicon, ncav mus txog 8,500 cm² / Vs. Qhov kev txav mus los no ua rau GaAs tshwj xeeb rau kev siv siab -ceev, xws li microwave thiab optical kev sib txuas lus. Txawm li cas los xij, GaAs yog kim dua los tsim dua li silicon thiab tsis yog siv dav hauv cov khoom siv hluav taws xob.
Graphite Semiconductor Mobility
Graphite yog ib daim ntawv ntawm cov pa roj carbon nrog lub cim hexagonal siv lead ua qauv. Nyob rau hauv xyoo tas los no, cov kws tshawb fawb tau pom tias graphite thiab nws cov derivatives, xws li graphene, muaj cov khoom siv hluav taws xob tshwj xeeb, nrog rau kev txav mus los. Graphene, ib txheej ntawm graphite, muaj lub zog hluav taws xob siab heev, uas tuaj yeem tshaj 200,000 cm² / Vs ntawm chav tsev kub. Qhov no yog ntau qhov kev txiav txim siab ntau dua li kev txav mus los ntawm silicon thiab txawm tias GaAs.
Kev txav siab siab hauv graphite semiconductors tuaj yeem raug ntaus nqi rau lawv cov qauv band tshwj xeeb thiab kev sib cuam tshuam tsis muaj zog ntawm tus nqi nqa khoom thiab cov lattice. Nyob rau hauv graphite, cov electrons yog delocalized hla tag nrho cov siv lead ua lattice, tso cai rau lawv txav mus los dawb nrog me ntsis tawg. Qhov no ua rau muaj kev thauj mus los sai heev thiab ua rau graphite semiconductors cog lus rau cov neeg sib tw rau siab - nrawm thiab qis - lub zog hluav taws xob.
Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov txiaj ntsig ntawm kev txav mus los tau tshaj tawm rau graphene feem ntau yog ntsuas hauv qhov chaw kuaj pom zoo. Hauv -cov ntawv thov hauv ntiaj teb tiag tiag, kev txav mus los ntawm graphite semiconductors tuaj yeem cuam tshuam los ntawm cov xwm txheej xws li kev sib cuam tshuam hauv substrate, tsis xws luag, thiab ib puag ncig. Piv txwv li, thaum graphene tso rau ntawm lub substrate, kev sib cuam tshuam ntawm graphene thiab lub substrate tuaj yeem ua kom paub cov impurities thiab tsis xws luag, uas tuaj yeem txo qhov kev txav mus los.
Daim ntawv thov ntawm Graphite Semiconductors Raws li Mobility
Lub siab txav ntawm graphite semiconductors ua rau lawv haum rau ntau yam kev siv. Hauv cov khoom siv hluav taws xob siab -ceev ceev, graphite semiconductors tuaj yeem siv los tsim cov transistors nrog kev hloov pauv nrawm dua li cov tsoos silicon -raws li transistors. Qhov no tuaj yeem ua rau kev txhim kho muaj zog thiab lub zog ntau dua -cov khoos phis tawj thiab cov khoom siv mobile.
Hauv thaj chaw ntawm optoelectronics, graphite semiconductors tuaj yeem siv los tsim siab -ceev photodetectors thiab lub teeb -emitting diodes. Lub siab txav tau tso cai rau lub sij hawm teb ceev ceev thiab kev hloov pauv ntawm lub teeb mus rau hauv cov teeb liab hluav taws xob lossis lwm qhov.
Graphite semiconductors kuj muaj peev xwm siv tau hauv cov khoom siv hluav taws xob hloov tau. Qhov yooj yim ntawm cov ntaub ntawv graphite, ua ke nrog lawv cov kev txav siab, ua rau lawv zoo tagnrho rau kev tsim cov khoom siv hluav taws xob uas tuaj yeem kho tau thiab ncab, xws li cov khoom siv tau yooj yim thiab cov khoom siv hnav.
Peb Graphite Semiconductor Khoom
Raws li tus neeg muag khoom ntawm graphite semiconductor khoom, peb muab ntau yam ntawm siab -zoo graphite Cheebtsam rau kev lag luam semiconductor. Peb cov khoom suav nrog Graphite Mould Parts rau Semiconductor Txheej Txheem, uas yog siv los tsim cov khoom siv semiconductor. Cov khoom no yog tsim los ntawm siab - purity graphite thiab yog tsim los muab thermal thiab hluav taws xob conductivity zoo, nrog rau cov neeg kho tshuab siab.
Peb kuj muab Graphite Spare Parts rau Ion Implantation. Ion implantation yog cov txheej txheem tseem ceeb hauv kev tsim khoom semiconductor, thiab peb cov khoom siv graphite tau tsim los tiv thaiv qhov siab - zog ion foob pob thiab muab kev ua haujlwm ruaj khov.
Tsis tas li ntawd, peb Graphite Pwm Rau Semiconductor yog siv los tsim cov khoom siv semiconductor thaum lub sijhawm tsim khoom. Lub siab thermal conductivity ntawm graphite ua kom cov cua sov thiab cua txias tsis sib xws, uas yog qhov tseem ceeb rau kev tsim cov khoom siv hluav taws xob zoo - zoo.
Xaus
Hauv kev xaus, graphite semiconductors muaj qhov tshwj xeeb txav mus los piv rau cov khoom siv semiconductor ib txwm muaj xws li silicon thiab gallium arsenide. Lub siab txav ntawm graphite semiconductors, tshwj xeeb tshaj yog nyob rau hauv graphene, muaj peev xwm los hloov pauv kev lag luam hluav taws xob los ntawm kev ua kom muaj kev loj hlob sai, muaj zog ntau dua -cov khoom siv tau zoo, thiab cov khoom siv hluav taws xob hloov tau yooj yim.
Txawm li cas los xij, tseem muaj kev sib tw kom kov yeej ua ntej graphite semiconductors tuaj yeem siv dav hauv cov ntawv thov tseem ceeb. Cov kev cov nyom no suav nrog kev txhim kho qhov kev ua kom muaj peev xwm ntawm kev tsim khoom, txo qhov cuam tshuam ntawm qhov tsis xws luag thiab substrate kev sib cuam tshuam ntawm kev txav mus los, thiab kev sib koom ua ke ntawm graphite semiconductors nrog cov txheej txheem tsim khoom semiconductor uas twb muaj lawm.
Raws li cov khoom lag luam graphite semiconductor, peb tau cog lus tias yuav muab siab - cov ntaub ntawv zoo thiab cov khoom siv los txhawb kev txhim kho cov thev naus laus zis zoo siab no. Yog tias koj xav paub ntau ntxiv txog peb cov khoom siv hluav taws xob graphite semiconductor lossis xav sib tham txog cov ntawv thov, thov hu rau peb rau kev yuav khoom thiab kev sib tham ntxiv.
Cov ntaub ntawv
Sze, SM, & Ng, KK (2007). Physics ntawm Semiconductor Devices. Wiley-Kev sib tham.
Geim, AK, & Novoselov, KS (2007). Qhov nce ntawm graphene. Nature Materials, 6(3), 183-191.
Das Sarma, S., Adam, S., Hwang, EH, & Rossi, E. (2011). Kev thauj mus los hauv hluav taws xob hauv ob-dimensional graphene. Kev tshuaj xyuas ntawm Modern Physics, 83(2), 407-470.