Qhov sib txawv tseem ceeb ntawm qhov sib txawv ntawm qhov tam sim no thiab qhov hluav taws xob tam sim no yog cov ntaub ntawv tam sim no vim yog qhov sib txawv ntawm cov neeg nqa khoom, hos cov ntaub ntawv tam sim no los ntawm kev txav ntawm cov khoom thauj los ntawm kev quab yuam tawm ntawm cov nqi hluav taws xob.
Diffusion tam sim no thiab drift tam sim no yog ob hom kev hla dhau tam sim no uas siv cov txheej txheem sib txawv los tsim cov tam sim no.
Diffusion Tam sim no yog dab tsi?
Diffusion tam sim no lossis diffusion tam sim no ntom ntom yog ib hom tam sim no hauv cov khoom siv hluav taws xob uas tshwm sim los ntawm kev sib txawv ntawm cov khoom thauj. Cov cab kuj nyob rau hauv cov ntsiab lus no yog qhov thiab electrons. Cov ntaub ntawv tam sim no vim yog kev thauj cov nqi uas tshwm sim hauv cov khoom tsis sib xws ntawm cov khoom siv hluav taws xob hauv semiconductor. Tsis tas li ntawd, diffusion tam sim no tuaj yeem nyob rau tib yam lossis qhov sib txawv ntawm cov lus qhia tam sim no raws li qhov sib npaug drift-diffusion.
Daim duab 1: Tsim Kev Tshaj Tawm Tam Sim No tshwm sim vim qhov kev faib tawm ntawm cov neeg nqa khoom
Thaum xav txog cov khoom siv hluav taws xob semiconductor, tam sim no ze rau thaj tsam depletion ntawm p-n hlws ris feem ntau yog tam sim no diffusion. Txawm li cas los xij, hauv cheeb tsam depletion, peb tuaj yeem saib ob hom tam sim no (diffusion thiab drift currents). Tsis tas li ntawd, ntawm qhov sib npaug ntawm p-n kev sib tshuam, peb tuaj yeem pom tias qhov sib txawv ntawm qhov tam sim no nyob rau hauv cheeb tsam depletion yog sib npaug nrog cov drift thim rov qab tam sim no. Yog li ntawd, tsis muaj net tam sim no.
Drift Current yog dab tsi?
Drift tam sim no tuaj yeem piav qhia raws li hom tam sim no hauv cov khoom siv hluav taws xob uas yog tshwm sim los ntawm kev quab yuam tawm ntawm cov khoom thauj los ntawm hluav taws xob. Lub zog sab nraud no feem ntau hu ua electromotive force. Tsis tas li ntawd, qhov nrawm nrawm tuaj yeem piav qhia raws li qhov nruab nrab tshaj tawm ntawm cov neeg nqa khoom thauj hauv lub drift tam sim no. Lub sij hawm drift tam sim no feem ntau pab tau nyob rau hauv cov ntsiab lus ntawm electrons thiab qhov nyob rau hauv semiconductors. Txawm li cas los xij, tib lub tswv yim no tuaj yeem siv rau cov hlau, electrolytes, thiab lwm yam.
Thaum lub sijhawm tsim cov drift tam sim no, cov khoom siv hluav taws xob raug thawb los ntawm hluav taws xob. Cov hluav taws xob tsis zoo, thiab lawv tau raug thawb mus rau qhov sib txawv ntawm qhov hluav taws xob. Qhov no ua rau cov ntsiab lus tam sim no nyob rau tib qho kev taw qhia.
Qhov txawv ntawm Diffusion Current thiab Drift Current yog dab tsi?
Diffusion thiab drift tam sim no yog ob hom hluav taws xob tam sim no uas tau tsim los ntawm kev sib txawv ntawm kev txav tam sim no. Qhov sib txawv ntawm qhov sib txawv ntawm qhov tam sim no thiab qhov hluav taws xob tam sim no yog cov ntaub ntawv tam sim no vim yog qhov sib txawv ntawm cov neeg nqa khoom, hos cov ntaub ntawv tam sim no vim qhov kev txav ntawm cov khoom thauj los ntawm kev quab yuam tawm ntawm cov nqi hluav taws xob. Ntxiv mus, Diffusion tam sim no ua raws li Fick txoj cai thaum tam sim no ua raws li Ohm txoj cai. Tsis tas li ntawd, thaum xav txog cov kev taw qhia ntawm tam sim no, diffusion tam sim no nyob ntawm txoj kab nqes ntawm cov cab kuj concentration, thaum drift tam sim no ib txwm nyob rau hauv cov kev taw qhia ntawm hluav taws xob teb.
Cov hauv qab no qhia txog qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv tam sim no thiab tam sim no nyob rau hauv daim ntawv tabular rau ib sab ntawm kev sib piv
Summary – Diffusion Current vs Drift Current
Diffusion tam sim no thiab drift tam sim no yog ob hom kev hla dhau tam sim no uas siv cov txheej txheem sib txawv los tsim cov khoom tam sim no. Qhov sib txawv ntawm qhov sib txawv ntawm qhov tam sim no thiab qhov hluav taws xob tam sim no yog cov ntaub ntawv tam sim no vim yog qhov sib txawv ntawm cov neeg nqa khoom, hos cov ntaub ntawv tam sim no vim qhov kev txav ntawm cov khoom thauj los ntawm kev quab yuam tawm ntawm cov nqi hluav taws xob.
