Ib N-hom semiconductor yog doped nrog pentavalent impurity los tsim cov electrons dawb. Xws li cov khoom yog conductive. Cov electron yog feem ntau cov cab kuj. P-hom semiconductor, doped nrog trivalent impurity, muaj ntau qhov dawb qhov.
Puas muaj pes tsawg electrons dawb nyob hauv ib lub semiconductor?
Ib qho ntshiab undoped semiconductor hu ua intrinsic semiconductor. Ib cubic centimeter muaj kwv 1010 dawb electrons thiab qhov (ntawm chav tsev kub). Txij li thaum cov electrons ib txwm xav tias lub zog qis tshaj plaws hauv lub xeev, lawv poob rov qab rau hauv lub valence band thiab rov sib txuas nrog lub qhov yog tias tsis muaj lub zog txaus.
Puas muaj pes tsawg electrons puas muaj ib tug semiconductor?
Cov electrons hauv lub plhaub no yog cov uas tsim kev sib raug zoo nrog cov atoms nyob sib ze. Xws li daim ntawv cog lus hu ua covalent bonds. Feem ntau cov conductors tsuas muaj ib tug electron nyob rau hauv lub valence plhaub. Semiconductors, ntawm qhov tod tes, feem ntau muaj plaub electrons hauv lawv lub plhaub valence.
Vim li cas semiconductor muaj tsawg dua electrons dawb dua li tus neeg xyuas pib?
Vim li cas semiconductor muaj tsawg dua electrons dawb dua li tus neeg xyuas pib? Lub valence electrons ntawm semiconductors yog nruj nreem khi rau cov atoms dua li cov conductors nce tus naj npawb ntawm conduction band electrons hauv intrinsic s / c (Si). … - electrons yog cov neeg nqa khoom feem ntau - qhov yog cov neeg nqa khoom tsawg.
Yuav ua li cas electrons yog dawb electrons?
Metals atoms muaj xoob electrons nyob rau hauv lub plhaub sab nrauv, uas tsim ib tug 'hiav txwv' ntawm delocalised los yog dawb tsis them nqi nyob ib ncig ntawm lub kaw-packed zoo ions. Cov electrons xoob no hu ua dawb electrons. Lawv tuaj yeem txav tau yooj yim thoob plaws hauv cov qauv hlau.
