Video: Lub zog roob hauv pn kev sib tshuam yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj ib qho zog gradiant thoob plaws cheeb tsam depletion uas ua raws li zog toj ” hais tias ib cheeb tsam n-electron yuav tsum nce mus rau thaj tsam p. Daim ntawv ceeb toom tias raws li cov zog theem ntawm n-thaj tsam conduction band tau hloov mus rau hauv qab, lub zog theem ntawm valence band kuj tau hloov qis.
Hauv qhov no, Fermi qib hauv pn junction yog dab tsi?
Fermi qib zog yog cov qib zog Qhov sib txawv ntawm tus neeg xyuas pib thiab insulator. Rau conductor, fermilevel yog zero. Rau insulator, qib fermi siab dhau lawm. Rau semiconductor, qib fermi yog tsawg heev. Rau PN kev sib tw diode yog semiconductor diode rau ob qho tib si P thiab N tus nqi ntawm qib fermi yog ib yam..
Qhov thib ob, pn junctions ua haujlwm li cas? PN kev sib tshuam yog tsim nyob rau hauv ib qho siv lead ua los ntawm kev koom nrog ob hom N thiab P-hom semiconductors. Thaum lub kev sib tshuam diode yog biased nyob rau hauv lub rov qab kev taw qhia, feem ntau tus nqi thauj khoom yog attracted los ntawm cov terminals nyob deb ntawm lub PN kev sib tshuam , yog li zam qhov diffusion ntawm electrons thiab qhov ntawm lub kev sib tshuam.
Tsuas yog li ntawd, kev tsis ncaj ncees ntawm pn kev sib tshuam yog dab tsi?
Tom ntej Biased PN Junction Diode Qhov no yog vim qhov tsis zoo voltage pushes los yog repels electrons ntawm lub kev sib tshuam muab lawv lub zog hla dhau thiab ua ke nrog lub qhov raug thawb mus rau qhov sib txawv ntawm qhov kev sib tshuam los ntawm qhov zoo voltage.
Yuav ua li cas lub zog band daim duab ntawm ib tug pn hlws ris hloov nyob rau hauv pem hauv ntej thiab rov qab bias?
P-N zog Bands Rau thim rov qab - kev tsis ncaj ncees tus p-n sib , sab p yog ua rau tsis zoo, ua rau nws "uphill" rau electrons txav hla lub kev sib tshuam . Lub conduction kev taw qhia rau electrons nyob rau hauv lub daim duab yog txoj cai mus rau sab laug, thiab cov kev taw qhia upward sawv cev nce electron zog.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm cov rog yuav cuam tshuam rau kev sib cuam tshuam ntawm cov dej molecules?
1 Teb. Qhov tseeb, dej muaj tag nrho peb hom kev sib xyaw ua ke, nrog qhov muaj zog tshaj plaws yog hydrogen bonding. Txhua yam muaj London dispersion yuam cov kev sib cuam tshuam tsis muaj zog yog ib ntus dipoles uas tsim los ntawm kev hloov ntawm electrons nyob rau hauv ib lub molecule
Dab tsi yog lub zog tsav ntawm kev sib sib zog nqus dej hiav txwv ncig?
Hauv dej hiav txwv sib sib zog nqus, qhov tseem ceeb ntawm kev tsav tsheb yog qhov sib txawv ntawm qhov ntom ntom, tshwm sim los ntawm salinity thiab kub variations (nce salinity thiab txo qhov kub ntawm cov kua ob qho tib si nce nws ntom). Muaj feem ntau tsis meej pem txog cov khoom ntawm cov kev ncig uas yog cua thiab ceev tsav
Dab tsi yog qhov txawv ntawm kev cuam tshuam kev cuam tshuam thiab kev cuam tshuam cuam tshuam?
Paub qhov txawv ntawm kev cuam tshuam kev tsim kho thiab kev cuam tshuam puas tsuaj. Kev tsim kev cuam tshuam tshwm sim thaum lub crests ntawm ob nthwv dej ntxiv ua ke. Kev cuam tshuam kev puas tsuaj tshwm sim thaum lub crest ntawm ib yoj raug txo los ntawm lub trough ntawm lwm tus
Dab tsi yog cov qauv ntawm lub zog nyob rau hauv lub peev xwm thiab lub zog kinetic?
Lub zog muaj peev xwm yog khaws cia lub zog thiab lub zog ntawm txoj haujlwm - lub zog gravitational. Muaj ntau hom kev muaj peev xwm muaj zog. Kinetic zog yog kev txav - ntawm nthwv dej, electrons, atoms, molecules, tshuaj, thiab khoom. Chemical Zog yog lub zog khaws cia hauv cov khoom sib txuas ntawm atoms thiab molecules
Lub zog ntawm kev cuam tshuam ntawm lub tsheb sib tsoo yog dab tsi?
Lub zog ntawm kev cuam tshuam txhais - cuam tshuam quab yuam sib npaug F yog qhov nruab nrab cuam tshuam quab yuam, m yog qhov loj ntawm ib yam khoom, v yog qhov pib ceev ntawm ib yam khoom, d yog qhov kev ncua deb ntawm kev sib tsoo