1. Cov nyhuv ntawm Photovoltaic:
Lub hauv paus ntawm lub hnub ci ntawm lub zog hloov hluav taws xob yog cov nyhuv photovoltaic ntawm cov khoom siv PN semiconductor. Thaum lub teeb yog teeb meem ntawm cov khoom siv hluav taws xob photovoltaic, photons muaj zog ntau dua li cov yeeb yaj kiab uas tau txwv tsis pub siv ntau dhau los ntawm cov yeeb yaj kiv los ntawm cov yeeb yaj kiab, thiab cov fais fab ntawm fais fab (electron-hole) yog qhov zoo siab nyob hauv thaj tsam N, thaj av uas muaj xwm txheej, thiab P cheeb tsam.
Kev Siv Tawm Tseg: Cov khoob khawm uas muag - Lub khwb khub tam sim ntawd sib cais los ntawm cov qauv hluav taws xob tom qab lawv raug tsim tawm hauv cheeb tsam thaj tsam thaj av, cov photogenerated electrons raug xa mus rau thaj av N, thiab cov duab thaij uas raug thawb rau hauv cheeb tsam P. Raws li qhov kev mob nkeeg ntawm lub cev, cov kab mob sib kis ntawm qhov ciam teb ntawm thaj av depletion yog kwv yees li 0, uas yog, p = n = 0.
Nyob rau hauv thaj av N: photogenerated electrons - tom qab lub qhov khub yog tsim tawm, qhov chaw txuas rau lub ciam teb ntawm lub pn photogenerated. Thaum nws ncav cuag tus ciam teb sab PN, nws yog tam sim ntawd raug rau hauv qhov chaw ua hluav taws xob, thiab raug cab los ntawm lub hwjchim ntawm lub tebchaw kom nws ua. Cov cheeb tsam nkag mus rau P cheeb tsam, thiab cov photogenerated electrons (ntau sub-) raug sab laug hauv cheeb tsam N.
Hauv thaj chaw P: cov me nyuam yaus (fostering electrons) (cov me nyuam yaus) xub nkag mus rau thaj tsam N vim txoj kev qaug zog, thiab ces tawm ntawm txoj kev poob, thiab cov qhov muag (ntau sub) nyob hauv cheeb tsam P. Yog li, qhov txuam nrog kev pom zoo thiab tsis pom zoo yog ua rau ob sab ntawm pn hlawv, thiaj li tias N cheeb tsam khw muag khoom noj ntau dhau lawm, thiab thaj chaw P tau tshaj qhov. Li no, ib qho yees duab-generated hluav taws xob muaj ib qho chaw tsim hluav taws xob hauv kev tawm tsam.
1. Txuas ntxiv rau txoj kev tshem tawm cov teeb meem ntawm lub tshuab fais fab, cov fais fab photogenerated kuj ua rau P cheeb tsam zoo tshaj qhov kev them nqi, thaj chaw N tsis tau them nqi, thiab nyias txheej nruab nrab ntawm cov cheeb tsam N thiab P cheeb tsam ua ib qho kev siv zog ntawm electromotive, uas yog cov nyhuv photovoltaic. Thaum lub roj teeb txuas nrog lub thauj khoom, cov photocurrent ntws los ntawm P-thaj tsam thauj mus rau N-cheeb tsam, thiab tso zis hluav taws xob tau txais hauv lub nkoj.
2. Yog tias lub PN hlauv taws xob qhib ob sab, tus ntsuas yuav tsum tau ntsuas, uas yog hu ua hluav taws xob qhib hluav taws xob Uoc. Qhov qhib hluav taws xob qhib qhov hluav taws xob rau crystalline silicon hlwb yog 0.5 mus 0.6V.
3. Yog hais tias sab nraud Circuit Court tsis muaj teeb meem, ib daim duab cuam tshuam rau qhov teeb meem pom lub zog muaj zog los ntawm sab nraud Circuit Court. Qhov no yog hu ua txoj kev Isc tam sim no.
Cov teeb meem cuam tshuam rau photocurrent:
1. Qhov ntau ntawm cov khoom siv hluav taws xob-lub qhov hluav taws xob tsim los ntawm lub teeb nyob rau hauv lub txheej txheej, ntau dua qhov tam sim no.
2. Lub teeb ci ntau lub cev ntim ntawm lub txheej kab sab nraud, qhov loj dua hauv cheeb tsam, piv txwv, qhov loj dua lub cheeb tsam roj teeb, qhov loj tshaj tam sim no ua nyob rau hauv lub hnub ci.
3. N cheeb tsam, thaj tsam ntawm thaj tsam thiab P cheeb tsam ntawm lub hnub ci cell yuav ua rau cov neeg muaj yees duab photogenerated;
4. Cov duab thaij duab hauv txhua cheeb tsam yuav tsum tau dhau los ntawm thaj chaw uas muaj qhov teeb meem ua ntej ua kom rov tuaj yeem ua rau lub photocurrent. Yog li, qhov tseeb yees duab-generated tam sim no yuav tsum tau los mus suav nyiaj ntau yam xws li kev tsim thiab cim, kev tawm thiab kev hloov hauv txhua qhov chaw.