Gabatarwa

A ranar farko da na fara aiki a layin samar da BC, mai kula ya ce muna yin TBC, masana'antar da ke kusa tana yin HPBC, kuma a yanar gizo mutane suna magana akan HBC, ABC, DBC... "Ba zan iya bambance ko ɗaya ba. Shin na zaɓi aikin da bai dace ba?" Ka kwantar da hankalinka. Wannan labarin yana yin abu ɗaya kawai: bayyana ma'anar da ke bayan wannan jerin haruffa. A ƙarshe, za ka gane cewa duk suna cikin iyali ɗaya. A gaskiya, za ka iya cewa su "mutum ɗaya ne a cikin tufafi daban-daban."

Kashi Na Farko: BC Sunan Iyali Ne, Ba Sunan Mutum Ba

Mutane da yawa suna ɗaukar BC a matsayin wata fasaha ta tantanin halitta ta musamman daidai da PERC da TOPCon. Wannan ita ce tarko ta farko.

BC = Back Contact

Ba yana nufin "wace fasahar passivation aka yi amfani da ita," ko "wane tsarin doping aka yi amfani da shi." Yana faɗi abu ɗaya kawai: electrodes suna a baya, kuma gaba ba shi da gridlines.

Don haka BC ya fi zama kamar "sunan mahaifi." Halin da ke tattare da tantanin halitta mai sunan mahaifi BC shine gefen gaba mai tsabta tare da dukkan electrodes a baya. Amma game da "sunan da aka ba" (takamaiman passivation, doping, da metallization da aka yi amfani da su), kowane mai ƙira ya bambanta.

Misali: BC shine rukunin "smartphone," yayin da TOPCon da HJT sune "tsarin aiki." Kuna iya amfani da Android (TOPCon) ko iOS (HJT), amma ko wane tsari ya gudana, har yanzu waya ce.

Wannan shine dalilin da yasa masana'antar ke kiran BC a matsayin "fasahar dandamali". Yana ba da tsarin tsari wanda zai iya ɗaukar tsarin passivation daban-daban.

Kashi na Biyu: IBC, Samfurin Tushe na Iyalin BC

IBC = Interdigitated Back Contact

IBC shine tushen tsarin BC kuma mafi kyawun nau'in tantanin halitta na BC. Abubuwan da ke ciki:

• Tushen wafer N-type

• Yankunan P+ da N+ na baya suna musanya kamar haƙoran tsefe (tsarin interdigitated)

• Na'urorin lantarki na baya suna daidaita da yankunan P+ da N+ bi da bi

• Babu layin grid a gaba, kawai murfin anti-reflective da Layer passivation

A cikin 1975, Schwartz da Lammert ne suka fara gabatar da manufar tuntuɓar baya. A cikin 1984, Farfesa Swanson a Jami'ar Stanford ya yi tantanin hasken rana mai lamba. Labarin IBC ya fara a lokacin.

Kuna iya tunanin IBC a matsayin "sigar BC mara fuska" ba tare da ƙarin passivation da aka saka ba, yana dogara kawai akan tsarin interdigitated kanta.

Tambayar ita ce: IBC inganci ya riga ya yi girma sosai, amma zai iya yin girma?

Amsa: tara buffs.

Kashi na Uku: Tara Buffs, Hanyar Juyin Halitta na BC

Tsarin gine-gine na BC (babu layukan grid na gaba + haɗin baya) yana tsayayye, amma tsarin kariya na iya canzawa. Wannan shine ikon "fasahar dandamali."

TBC = TOPCon + BC

Sanya tsarin kariya na TOPCon tunnel oxide + doped polysilicon akan tsarin BC, kuma za ku sami TBC.

A cikin jimla ɗaya: TBC = kariyar TOPCon + tsarin BC. Ingantacciyar ƙarfi (3% ƙarancin inuwa gaba ≈ ribar Jsc kusan 1-1.5 mA/cm²), amma sarrafawa mai rikitarwa.

Ingantacciyar TBC ta LONGi ta riga ta wuce 27%, ta yi amfani da wannan hanya.

HBC = HJT + BC

Idan ka sanya tsarin kariya na amorphous silicon heterojunction na HJT a kan tsarin BC, za ka sami HBC.

HBC yana da mafi girman iyakar inganci (kariyar amorphous silicon tana da kyau ta halitta + babu inuwa a gaba), amma taga zafin aiki yana da kunkuntar kuma kayan aiki yana da tsada, yana sa samarwa da yawa ya fi wahala. Risen Energy da Golden Stone Energy suna bin wannan hanya.

Takaitaccen hanyoyin "buff-stacking" guda biyu:

TBC = "core" na TOPCon a cikin "shell" na BC → kyakkyawan gadon tsari, ana iya gyara layukan TOPCon. HBC = "core" na HJT a cikin "shell" na BC → mafi girman iyakar inganci, amma kuma mafi girman matakin samarwa.

Kashi na Hudu: Sunan Masana'anta, Hanyar Haka, Kowa Ya Kira Nasa

IBC, TBC, da HBC da ke sama sunaye ne na hanyoyin fasaha da ake amfani da su a masana'antu. Amma kowane mai kera yana da nasa sunayen samfuran, wanda ke ƙara rikitarwa ga sababbin masu shiga.

Ka ga tsarin? Sunan samfurin masana'anta = hanyar fasaha + alamar kamfani. HPBC ainihin P-type BC ne, ABC ainihin N-type IBC ne, kuma IBC kawai IBC ne. Jigon fasaha bai taɓa fita daga waɗannan hanyoyin kaɗan da aka ambata ba.

Kamar yadda "Huawei Mate" da "Xiaomi 14" duk ana kiransu wayoyi, kawai da alamomi daban-daban. HPBC da ABC duk BC ne, kawai daga masana'anta daban-daban.

Kashi na Biyar: Kuskure Uku na Yau da Kullun, An Share su Gaba ɗaya

Kuskure na 1: "BC fasaha ce mai zaman kanta da ke fafatawa da TOPCon/HJT"

Ba daidai ba. BC sabon tsari ne, yayin da TOPCon/HJT sabon rufe fuska ne. Girma biyu daban-daban. Ana iya haɗa BC da TOPCon (= TBC) ko da HJT (= HBC). Ba su cikin dangantakar "fafatawa" amma dangantakar "haɗuwa".

Kuskure na 2: "HPBC daidai yake da HBC"

Ba daidai ba. H a cikin HPBC yana nufin Hybrid (rufe fuska mai haɗaka), yayin da H a cikin HBC yana nufin Heterojunction. Sunayen suna kama, amma hanyoyin fasaha sun bambanta gaba daya. HPBC tana amfani da wafers na P-type + hybrid passivation, yayin da HBC ke amfani da wafers na N-type + amorphous silicon heterojunction passivation.

Kuskure na 3: "IBC an daina amfani da shi; yanzu duk TBC/HBC ne"

Ba daidai ba ne. A matsayin samfurin tushe, IBC ya kasance tushen tsarin dukkan sel BC. Dukansu TBC da HBC suna sanya passivation a kan tsarin IBC. Har yanzu Maxeon yana samar da IBC na gargajiya a yau, tare da inganci wanda ba shi da ƙarancin gaske. Kawai daga mahangar iyakar inganci, stacking buffs yana hawa sama.

Ƙarshe

BC shine harsashi, TOPCon/HJT shine ainihin, IBC shine fuska mara kyau, TBC/HBC sune nau'ikan buff-stacked, kuma HPBC/ABC/DBC sune sunayen alamar kasuwanci.

Ka fahimci waɗannan matakai huɗu, za ka iya gano kowace harafi.

Lokaci na gaba da mai kula ya ce "layinmu yana yin TBC," za ka san ainihin abin da ke faruwa: oh, passivation na TOPCon an saka shi cikin tsarin BC, babu gridlines na gaba, tsarin interdigitated na baya. Na fahimta.

ooitech ya yi imani: BC ba hamayya ce ga TOPCon ko HJT ba amma dandamali ne na tsari wanda za a iya sanya fasahohin kariya daban-daban a kai, kuma fahimtar wannan dangantakar iyali yana bayyana kowane gajeren sunan BC nan take.