Video: Yuav ua li cas koj xam ua nyob rau hauv voltage?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov built-in muaj peev xwm (ntawm 300 K) sib npaug fi = kT/q ln(1016 x9x 1017/ni2) = 0.77 V, siv kT/q = 25.84 mV thiab ni = 1010 cm-3. Cov built-in muaj peev xwm (ntawm 100 ° C) sib npaug fi = kT/q ln(1016 x9x 1017/ni2) = 0.673 V, siv kT/q = 32.14 mV thiab ni Luas = 8,55 x 1011 cm-3 (los ntawm Piv txwv 20).
Yog li ntawd, dab tsi yog qhov tsim hauv qhov hluav taws xob ntawm pn kev sib tshuam?
Muaj ib qho " ua -hauv” VOLTAGE ntawm p-n sib interface uas tiv thaiv kev nkag mus ntawm electrons mus rau p-sab thiab qhov rau hauv n-sab. Thaum lub hluav taws xob V yog qhov zoo ("rau pem hauv ntej" polarity) lub sij hawm exponential nce sai nrog V thiab tam sim no siab.
Tsis tas li, koj ntsuas qhov muaj peev xwm barrier li cas? Ib qho yooj yim voltmeter muaj finite input impedance uas yooj yim txhais tau tias, rau ntsuas ib qho hluav taws xob hla, yuav tsum muaj qee qhov (me me) tam sim no los ntawm voltmeter. Yog li ntawd, rau ntsuas lub built-in peev xwm ntawm lub diode nrog lub voltmeter yuav xav tau qhov built-in peev xwm 'tsav' ib (me me) tam sim no los ntawm voltmeter.
Tom qab ntawd, dab tsi yog tsim nyob rau hauv voltage?
4.3. 1 Cov ua - nyob rau hauv muaj peev xwm. Cov ua - nyob rau hauv muaj peev xwm nyob rau hauv ib tug semiconductor sib npaug lub peev xwm nyob rau hauv lub depletion cheeb tsam nyob rau hauv thermal equilibrium. Nws kuj sib npaug ntawm cov peev txheej ntau ntawm txhua cheeb tsam, txij li cov peev txheej ntau qhov ntsuas qhov kev ncua deb ntawm lub zog fermi thiab lub zog sab hauv.
Dab tsi yog txhais los ntawm cheeb tsam depletion?
Depletion cheeb tsam los yog depletion txheej yog a cheeb tsam nyob rau hauv P-N hlws ris diode qhov twg tsis muaj mobile chargers. Depletion txheej ua zoo li lub thaiv uas tawm tsam qhov ntws ntawm electrons los ntawm n-sab thiab qhov ntawm p-sab.
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