- I-TOPCon ifuna iipasti zesilivere kumacala omabini, nazo ezineekhemistri zokuncamathisela eziphikisanayo, zifuna amaqondo obushushu aphezulu naphantsi adubula ngaphambili nangasemva, ngokulandelelana.
- Ukubekwa kwencama (kumacala omabini) ye-wafer ye-M6 esekwe kwi-TOPCon yeseli ye-bifacial ukusuka kwi-100 ukuya kwi-140 mg (emele ukugqithiswa kwalo naliphi na icala) ibhekisa kububanzi bomnwe obuyi-30 ukuya kwi-35 µm.
- I-RENA kwelinye icala ikhuthaza ukufakwa kobhedu njengenye indlela yoshicilelo lwesikrini ukunciphisa iindleko kwaye ithembisa ukusebenza okuphezulu.
I-Metallization yinxalenye ekhohlisayo kwinkqubo yokwenziwa kweeseli ze-TOPCon. Njengakwi-PERC, iimpembelelo ezi-2 zeendleko kukusetyenziswa kweentlama zesilivere kunye nenkqubo yokubeka ngokwayo. Umahluko apha kukuba intlama yesilivere iyafuneka kumacala omabini, phantse iindleko ezinxulumene nokuncamathisela ziphindwe kabini. Inkqubo ekhoyo phakathi kwabenzi beeseli kukusebenzisa i-PERC i-paste yesilivere ukuqhagamshelana necala elingasemva leeseli zoqhagamshelwano. Nangona kunjalo, i-TOPCon idinga uncamathiselo olulungiselelweyo ukuze uvule izibonelelo zokusebenza ezipheleleyo. Iipastes ezinje ngokuyimfuneko kufuneka zibe neempawu ezilawulwa kakuhle zokuphinda zisebenze kunye nokukwazi ukunxibelelana kuphela nefilimu yepolysilicon edibeneyo, ngelixa ingonakalisi i-tunneling oxide engaphantsi. Kukho kwakhona umda kwicala langaphambili; iipaste zesilivere ezisetyenziselwa kwicala elikhuphayo leeseli zohlobo lwe-n zidla ngokufakwa i-aluminiyam, ngaloo ndlela ifuna amaqondo obushushu aphezulu okudubula, xa kuthelekiswa ne-PERC. Ekubeni abafowunelwa kufuneka badityaniswe, i-chemistry yokunamathisela ehambelanayo kufuneka isekwe enokwanelisa imfuno kumacala omabini eeseli.
Uninzi lwabavelisi abaphambili bokuncamathelisa, njenge Heraeus, DKEM kwaye Fusion, baye baphuhlisa iipastes ezinjalo ngokubambisana ngokusondeleyo nabenzi be-TOPCon. Ukusukela oko Itekhnoloji ye-TOPCon sele iphantsi kovavanyo kuvavanyo kunye nemigca yokulinga yabenzi abaninzi (i-Jolywood njengomvelisi wokuqala omkhulu ngaphandle), uphuhliso kwiipastes lujoliswe kubathengi. Ke, imixube yokuncamathela ephucukileyo ye-TOPCon ayisoloko ikhuthazwa kwimarike evulekileyo.
I-DKEM kuphela kwenkampani ebonelela ngeembono ezithile. Inkampani yaseTshayina yazisa i-TOPCon iipastes ezithile kwiminyaka eyi-2 eyadlulayo. Ngelixa ikhuthaza iipasti ezi-2 nganye ngaphambili nangasemva, i-DK93T yayo ikhethekile phakathi kwabo. Ngumnwe ongemva owenza intlama kwaye iqonga lokuncamathelisa lenzelwe ulwakhiwo oluqhelekileyo lwe-TOPCon lwe-120 ukuya kwi-140 nm engqingqwa yepolysilicon umaleko, eyona nto iphambili, ngokwetekhnoloji ye-DKEM kunye nosekela mongameli wezentengiso uKevin Nan. Nangona kunjalo, inkampani ikulungele ukusebenzisana nabathengi ukukhulisa ukwakheka ukuze kuhambelane nobukhulu obuthile bepolysilicon yomenzi weseli. “Sinokuxhasa ungqimba lwepolysilicon ukuya kuthi ga kwi-100 nm,” utshilo uNan. Intlama yenzelwe ukuba ihambelane ne-alkaline epholisiweyo yangemva ye-morphology, intsingiselo entsha kwicandelo le-TOPCon endaweni yombhalo we-acidic, wongeza uNan.
I-paste eqhelekileyo yokubeka kunye nesakhiwo se-TOPCon, ngokutsho kwe-Nan, malunga ne-140 mg ngeseli nganye esekelwe kwifomathi ye-wafer ye-M6, ngelixa abavelisi abambalwa be-paste baye bakwazi ukutyhala imida kwi-100 mg ukuya kwi-120 mg. "Kunzima ukulinganisa ukusebenza kunye nokuthembeka kweli nqanaba," gxininisa uNan. “Nangona kunjalo, ububanzi beminwe bahlukile ngaphambili nangasemva. Ngelixa kulula ukufikelela kwi-30 µm ngaphambili, ukufikelela kububanzi beminwe ephantsi ngolo hlobo nge-aluminiyam ngumceli mngeni,” ugxininisa uNan. "Nangona kunjalo, i-35 µm iyafezekiswa," wongeze watsho.
IJolywood, umzekelo, iyakwazi ukufumana ubungakanani beminwe bumxinwa njenge 30 µm, ngelixa uLaplace esithi i-100 mg yokuncamathelisa ukubeka phantsi sele kuphunyeziwe kwimveliso yeseli ye-bifacial efuna uqhagamshelwano lwesilivere kumacala omabini. Wonke umenzi wezixhobo kunye nomvelisi weTaiyangNews wathetha naye uvakalise ukuba isantya sophuhliso lwencama siye sanelisa.
Ngelixa oku kuyimpembelelo ethe ngqo, iipastes zikwaphembelela inkqubo yokubeka, ngakumbi i-throughput. Njengoko kuxoxiwe ngaphambili, ubukhulu obuqhelekileyo befilimu ye-polysilicon buphakathi kwe-80 ukuya kwi-150 nm, kodwa iyancipha ngakumbi - ifilimu iyancipha, imfutshane umjikelo we-deposit, ngaloo ndlela iphucula i-output yezixhobo zokubeka. Ngelixa akukho mda ekuqondeni iifilimu ezibhityileyo kwicala lezixhobo, inqunyanyiswa ikakhulu yi-metallization pastes ehambelanayo.
Ukutywala
Ukulinganisa iindleko eziphezulu zokuvelisa ezinxulumene ne-metallization pastes njengomnye wemiqobo ephambili ye-TOPCon, Rena kwezinye iilwimi ikhuthaza ukucakwa kobhedu njengenye indlela yoshicilelo lwesikrini. Ishwankathela uphuculo lwakutsha nje olunxulunyaniswa ne-InCellPlate, iqonga le-RENA's SVP Technology & Innovation Holger Kuhnlein ugxininisa ukuba iimveliso zesizukulwana sangoku azidingi i-N2-annealing. Isixhobo saso silandela inkqubo yokuhamba kwe-laser yokuvula kunye ne-plating elandelayo kumacala omabini, kwaye ekugqibeleni i-annealing yabafowunelwa. Isisombululo senkampani seplating senza umnwe omxinwa wobubanzi kunye nokuvulwa kwelaser ye-10 µm.
I-RENA ibisebenza noJinkoSolar ukuphuhlisa izisombululo ze-metallization ezisekelwe kwiplating. Inkampani ibonelele ngohlaziyo oluqaqambisa ukuba bakwazile ukufezekisa ukusebenza kakuhle kwe-23.9% ngetekhnoloji ye-JinkoSolar ye-HOT2.0, i-0.1% ephezulu yobuchule obugqibeleleyo ngaphezulu koqhagamshelwano olusisiseko olushicilelwe kwisikrini. Nangona kunjalo, i-avareji esebenzayo yangoku i-22.6% kwaye i-RENA inomkhombandlela wendlela yokunyusa le nqanaba ukuya kwi-23.5% ngo-2022 usebenzisa uqhagamshelwano lobhedu. Inkampani iphinda igxininise ukuba umonakalo owenziwe yi-laser kunye ne-plating approach iphantsi kakhulu xa kuthelekiswa nomlilo-ngokusebenzisa i-pastes yesilivere, ngoko ke amandla aphezulu okusebenza kwe-0.3 ukuya kwi-0.5%. Unxibelelwano olucekethekileyo olwenziwe ngokutyalwa lukwanceda ekuphuculeni i-bifaciality.
Eli nqaku lifutshane lithatyathwe kwingxelo yethu yamva nje ye-TaiyangNews kwi-TOPCon Solar Technology, efumanekayo ukukhuphela mahala. ngokuchofoza iqhosha eliluhlaza ngezantsi.
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