Qhov ntsuas kub cuam tshuam li cas rau qhov sib txawv band? Raws li qhov kub thiab txias, qhov sib txawv ntawm qhov sib txawv lub zog txo qisvim tias cov iav siv lead ua nthuav dav thiab cov khoom sib txuas sib txuas tsis muaj zog. Cov ntawv cog lus tsis muaj zog txhais tau tias yuav tsum muaj lub zog tsawg dua los rhuav tshem daim ntawv cog lus thiab tau txais cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob.
Puas yog bandgap kub nyob ntawm?
Qhov kub ntawm qhov sib txawv ntawm qhov sib txawv ntawm InN yog qhov tsis muaj zog dua rau feem ntau cov khoom siv semiconductors. Rau ib qho piv txwv uas tsis tshua muaj electron concentration (n=3.5 × 1017cm-3), bandgap variation ntawm chav tsev kub thiab kub tsis tshua muaj tsuas yog 47 meV. Qhov cuam tshuam ntawm qhov ntsuas kub me me no yuav raug tham.
Yuav ua li cas band sib txawv cuam tshuam rau cov khoom siv hauv nruab nrog cev nrog rau qhov ntsuas kub?
Cov neeg nqa khoom no nyob ntawm qhov sib txawv ntawm cov khoom siv thiab qhov kub ntawm cov khoom. Qhov sib txawv ntawm qhov loj yuav ua rau nws nyuaj rau tus neeg nqa khoom kom muaj kev zoo siab thoob plaws qhov sib txawv ntawm qhov sib txawv, thiab yog li ntawd cov khoom siv hauv nruab nrab yogqis dua cov khoom sib txawv siab dua.
kub cuam tshuam rau Fermi faib li cas?
Kev cuam tshuam ntawm qhov kub ntawm Fermi-Dirac Distribution Function
At T=0 K, cov electrons yuav muaj lub zog qis thiab yog li tuav lub xeev qis zog. … Txawm li cas los xij raws li qhov kub thiab txias, cov hluav taws xob tau nce ntau thiab ntau lub zog vim tias lawv tuaj yeem nce mus rau cov kab hluav taws xob.
Thaum qhov kub ntawm semiconductor tau tsa nws lub zog sib txawv?
Lub zog sib txawv ntawm lub valance thiab cov khoom siv hluav taws xob tsawg heev, yog li los ntawm kev nce qhov ntsuas kub peb tuaj yeem tau txais ntau electrons flipping los ntawm valance mus rau conduction daim ntawv cog lus yog li ua rau cov cab kuj nce. hluav taws xob hauv semiconductors.
