- Bonke ubuchwepheshe beselula obuthuthukisiwe buhluka kakhulu ngokuya nge-passivation shceme
- Kunezindlela ezimbili ezihilelekile ku-passivation: i-field effect passivation kanye ne-chemical passivation
- Ngenkathi i-chemical passivation ibhekene nokugcwaliswa kwamabhondi alengayo, ukudlula komphumela wenkundla kusebenzisana nokudala inkambu kagesi eduze nangaphezulu ukuze kuxoshwe abathwali bokushaja be-polarity efanayo.
Bonke ubuchwepheshe be-solar cell obuthuthukisiwe bunokwakheka kweseli ehlukile futhi bulandela ukugeleza kwenqubo ehluke ngokuphelele. Kodwa-ke, ngombono obanzi, i-passivation scheme iyisici esiyinhloko esihlukanisayo kubo bonke lobu buchwepheshe beselula obusebenza kahle kakhulu. Ukulungisa inqubo ye-metalization ngokuya ngokucushwa kwe-passivation kungenye ingxenye ebalulekile yokusebenzisa bonke lobu buchwepheshe beselula obuthuthukisiwe. Ngezansi isifinyezo esifushane sezisekelo ze-passivation.
Izisekelo zePassivation
I-silicon wafer - into eluhlaza eyisisekelo - isenokukhubazeka okungokwemvelo ngesikhathi sokungena kulayini weseli. Okugqama kakhulu ukonakala okungaphezulu okuvela ohlelweni oluyisisekelo lokusika amawafa kusuka ku-ingot okubangela ukuphazamiseka kwe-crystal lattice kuzo zombili izindawo eziyisicwecwana. Lokhu kuphazamiseka ohlelweni lwezikhathi lwama-athomu e-silicon kubangela lokho okubizwa ngokuthi amabhondi alengayo, asebenza njengezikhungo zokuhlanganisa kabusha. I-passivation yinqubo lapho lezi ziphambeko zenziwa zingasebenzi ukuze kuncishiswe ukuhlangana kabusha okungaphezulu kwezithwali zokushaja, ukuvikela ukusebenza kahle kwamaseli.
Kunezindlela ezimbili ezihambisanayo zokudlula: a) ukwehlisa kakhulu izithwali zokushaja ze-polarity eyodwa efinyelela phezulu, kanye b) nokunciphisa isimo sokusebenzelana ngokugcwalisa amabhondi alengayo. Lesi sakamuva singafezwa, futhi, ngezindlela ezimbili. Eyokuqala iwukumane ugcwalise amabhondi alengayo ngaphezulu ngokunikeza izimo ezifanele zokukhulisa isendlalelo esingaphezulu esivumela isikhathi esanele namandla ukuze ama-athomu afinyelele amazinga afanele wamandla ukuze agcwalise la mabhondi alengayo. Kungenjalo, umuntu angafaka ifilimu ye-hydrogen-rich dielectric ekhipha i-hydrogen ezinyathelweni zokudubula ezilandelayo. I-hydrogen yamahhala ithatha izindawo ezingenamuntu zamabhondi alengayo, ngaleyo ndlela iwathulise. Le ndlela ibizwa ngokuthi i-chemical passivation.
Kukhona enye indlela ebizwa ngokuthi field effect passivation, okubandakanya ukudala inkambu kagesi eduze nendawo ekwazi ukuxosha abathwali bokushaja be-polarity efanayo. Ingafinyelelwa ngokwehlisa ukuminyana kwe-dopant kusuka ekugxilweni okuphezulu kwendawo. Ngaphezulu, ukusebenzisa ungqimba lwe-dielectric olunamashaji aphezulu angaguquki futhi kudala i-gradient yensimu kagesi eduze nendawo, ehlinzeka ngokudlula komphumela wenkundla (bona igrafu). Ngokulandela lesi simiso esiyisisekelo, yonke i-architecture yamaseli ethuthukisiwe ifaka isikimu esithile sokudlula.
Umthombo ovela Izindaba ze-Taiyang
