Kune mhando dzakasiyana dzemagetsi ari mukati memasero ezuva, akadai serima, reverse current, uye leakage current. Mamagetsi aya ane mwero wakasiyana wesimba rinobuda mumagetsi ezuva. Kusiyanisa hunhu hwemagetsi aya kunogona kubatsira kuziva zvikonzero zvekubuda kwemagetsi mumagetsi zvisina kujairika, zvichibatsira mukugadziriswa kwematambudziko acho.
Rima Rakakura
Tsanangudzo
Dark current, inozivikanwawo se reverse saturation current pasi pekusavhenekerwa, inoreva reverse DC current inogadzirwa muPN junction pasi pe reverse bias mamiriro ezvinhu kana pasina chiedza chechiitiko. Inowanzo kukonzerwa nekupararira kwecarrier kana kukanganisa pamusoro uye mukati memudziyo, pamwe nekusvibiswa kunokuvadza.
Kuumbwa
(1).Maitiro Ekupararira:Mukati mePN junction, mune maerekitironi akawanda muN-region uye maburi akawanda muP-region. Nekuda kwemusiyano wekuwanda kwemagetsi, maerekitironi ari muN-region anopararira akananga kuP-region, uye maburi ari muP-region anopararira akananga kuN-region. Kunyangwe nzvimbo yemagetsi yakavakirwa mukati mePN junction ichiramba kupararira uku, kunoitika kusvika pave ne dynamic equilibrium, zvichigadzira diffusion current.
(2).Zvisina Kunaka uye Kusachena:Kana paine zvikanganiso pamusoro kana mukati memudziyo, zvinoshanda senzvimbo dzekubatanidza, zvichibata maerekitironi nemaburi uye zvichiita kuti zvive nyore kubatanidza. Tsvina inokuvadza inoita basa rakafanana, ichibatsira pakuumbwa kwerima.
Mhedzisiro
Dark current inowanzo fungwa nezvayo panguva yekuronga silicon wafer. Dark current yakawanda inoratidza kuti wafer haina kunaka, zvakaita semamiriro ezvinhu akawanda pamusoro, zvikanganiso zvakawanda zve lattice, tsvina inokuvadza, kana kuti doping yakawanda zvakanyanya. Masero ezuva akagadzirwa kubva kuma wafer akadaro anowanzo ratidza hupenyu hushoma hwekutakura, zvichikonzera kuti pave nekushanda kwakaderera kwekushandura.
Mhepo Yakasviba Mumasero Ezuva
Muma diode ari nyore, rima rinofanana nereverse saturation current. Zvisinei, mumasero ezuva, rima rinosanganisa reverse saturation current, thin-layer leakage current, uye bulk leakage current.
Kusagadzikana Kuzadza Kwazvino
Tsanangudzo
Kuchinja kwemagetsi (reverse saturation current) zvinoreva simba riri muPN junction kana reverse bias ikashandiswa. Reverse voltage inowedzera depletion layer, ichiwedzera simba remagetsi uye simba ringangoshandiswa nemaerekitironi. Izvi zvinoita kuti zviomere vatakuri vazhinji kuyambuka chipingamupinyi, zvichideredza diffusion current kusvika padyo ne zero.
Kuumbwa
1. Kuyerera Kwemagetsi: Kuwedzera kwesimba remagetsi kunoita kuti zvive nyore kuti vatakuri vemagetsi vashoma munzvimbo dzeN neP vafambe, zvichiita kuti magetsi afambe nereverse current.
2. Kuvimba neTembiricha: Sezvo vatakuri vemafuta mashoma vachigadzirwa nekupisa, nhamba yavo inogara iripo patembiricha yakatarwa, uye ndizvo zvakaitawo reverse current.
Kubuda Kwemazuva Ano
Tsanangudzo
Masero ezuva anogona kukamurwa kuita matunhu matatu: tete layer (N-region), depletion layer (PN junction), uye bulk region (P-region). Zvikanganiso netsvina munzvimbo idzi zvinoshanda senzvimbo dze recombination, zvichibata maerekitironi nemaburi kuti zvive nyore recombination. Maitiro aya anogadzira ma currents madiki, zvichibatsira mukuyera dark current.
Mhando
· Kudonha Kwemvura Muchikamu Chitete: Kunokonzerwa nekusakwana uye kusviba kuri muchikamu chitete.
· Kubuda Kwemvura Muzhinji: Kunokonzerwa nekusakwana uye kusvibiswa munzvimbo yakawanda.
Chinangwa cheKuedza Kwerima
1. Kudzivirira Kuparara
Kana sero rave reverse-biased kana module polarity ikadzoserwa shure, dark current yakawandisa inogona kukonzera kuparara kwemasero nekukurumidza. Kunyangwe zvisingawanzoitiki, kuyedza dark current kunobatsira kudzivirira kuitika kwakadaro.
2. Kutarisa Maitiro Ekugadzira
Kuyedzwa kwerima kunobatsira kuona matambudziko anogona kuitika. Dark current inoumbwa ne reverse saturation current, thin-layer leakage current, uye bulk leakage current, inomiririrwa neJ1J_1J1, J2J_2J2, uye J3J_3J3, zvichiteerana.
Kana voltage yekudzokera shure yashandiswa:
· Dunhu 1: Rinotongwa neJ2J_2J2 (kudonha kwemvura kwakatetepa).
· Dunhu 2: Rinotongwa neJ3J_3J3 (bulk leakage current).
· Dunhu rechitatu: Rinotongwa neJ1J_1J1 (reverse saturation current).
Miganhu yenzvimbo idzi inosarudzwa nemagetsi chaiwo ekuyedza.
Mhedzisiro yeVoltage
Kana voltage ikaiswa musero, inokonzera kupinza kwemagetsi musilicon wafer, zvinofadza zvisingaenzaniswi. Kana voltage yakakwira, zvinosimudzirawo mafambiro emagetsi, zvichikonzera rima rakawanda. Zvisinei, kukura kwemagetsi kunoderera sezvo voltage ichiwedzera kusvika sero raputsika.
Kuedzwa Kwakajairika
Dark current inowanzo ongororwa pa12V. Nekuenzanisa mhedzisiro yebvunzo ne standard curves, mamiriro esero anogona kuongororwa:
· Mvura yakasviba yakawanda muDunhu 1 inoratidza matambudziko muchikamu chakatetepa.
· Mvura yakasviba yakawanda muDunhu rechipiri inoratidza matambudziko munzvimbo yakakura.
· Kuwanda kwerima muDunhu rechitatu kunoratidza matambudziko nePN junction, zvakaita sekupararira, kudhindwa kwechiso, kana kusawirirana kwetembiricha.
Mhedziso
Kuedza simba rerima kwakakosha pakuona matambudziko ane chekuita nemaitiro uye kuvandudza kugadzirwa kwemasero ezuva.
