Dual-Side Electrical Refinement ya Tura Industrial M10 TOPCon zuwa 26.66%
Teburin Abubuwan Ciki
Gabatarwar Samfur
"Shin TOPCon da gaske zai iya fitar da wani 0.5%? Iyakar Auger ta riga ta kasance a gabanmu."
Wannan layin hutu ya taƙaita damuwar gama gari na duk wanda ke gudanar da layin n-TOPCon a cikin shekaru biyu da suka gabata. M10 cikakkun sel, ingancin samar da yawa ya tsaya tsakanin 25.5% da 26%, kuma kowane ƙarin 0.1% yana nufin yaƙi da sake haɗuwa, tuntuɓar, da man azurfa. Sai Jinko, tare da Cibiyar Kayan Aiki ta Ningbo, suka fitar da wannan takardar Nature Energy kuma suka tura ingancin M10 TOPCon na masana'antu kai tsaye zuwa 26.66%, kuma suka ɗaga bifaciality zuwa 88.3% a hanya. Taƙaitaccen jumla: gyara ɓangarorin lantarki biyu a lokaci guda, maimakon kawai neman passivation ko kawai neman gridlines.
Yang, Z. et al. Dual-side electrical refinement enables efficient industrial tunnel oxide passivating contact silicon solar cells. Nat. Energy 11, 699-709 (2026). doi:10.1038/s41560-026-01982-2
26.66%, Ina Wannan Sabon Mataki Ya Fito
Labaran "ingancin TOPCon" a cikin shekarar da ta gabata sun ɗan gaji da kallo. 26.1%, 26.35%, galibi gyare-gyaren zaɓi na Laser ko ƙananan gyare-gyaren boron emitter. A wannan karon layin Jinko ya yanke a ɓangarorin biyu a lokaci guda:
Gaban gaba: boron emitter mai juriya mai girma tare da inganta tsarin gridline, rage sake haɗuwa da asarar sufuri.
Fuskar baya: tsarin poly-Si/SiOx mai hawa biyu, yana toshe yaduwar azurfa, babban crystallinity na ciki, ƙarancin phosphorus mara aiki a cikin substrate, da kuma raguwa a cikin gida.
Dandalin tabbatarwa: M10 masana'antu cikakken girman sel, ba gwajin gwaji ba.
Wannan 88.3% bifaciality ya fi jan hankali fiye da cikakken inganci a duniyar n-TOPCon, kuma zan bayyana dalili daga baya.
Fuskar gaba: Babban-Sheet-Resistance Boron Emitter, Yi ƙarfin hali don Tura shi
Tsohuwar i-TOPCon gaba-fuska sabani: boron diffusion yayi nauyi sosai kuma Auger tare da tattarawar tattarawa ya fashe; idan yayi haske sosai, juriya na gefen emitter yana girma, halin yanzu a ƙarƙashin yatsu masu kyau ba za a iya tattara shi ba, kuma kuna komawa tilasta lamba tare da LECO.
Abin da wannan takarda ta yi (duba jerin Figure 2):
Yi aiki tuƙuru don tura juriyar boron emitter sheet, da zarar ingancin wucewa ya kasance kuma an kiyaye martanin shuɗi.
Sake gudanar da tsarin busbar/finger don a rasa asarar jigilar kaya a gefe a matakin gridline.
A gefen metallization, yi amfani da hanyar nano Joule-heating (tushen aikin tawagarsu a Zhou et al., Small 2025 yana cikin nassoshi) don rage juriyar haɗin Ag-Si.
Kwatancen IQE/PL na Figure 2 ya nuna shi: yawan halin yanzu na sake haɗuwa a saman gaba j0 na ƙungiyar emitter mai juriya ya ragu a fili, kuma fill factor bai rushe ba, wanda ke nufin inganta gridline da haɗin gida ya gyara ɓangaren sufuri.
Ra'ayin injiniyan layi: babban tarko tare da boron emitter mai juriya ba aikin lantarki ba ne, shi ne buga taga firing-through da dacewa da tsarin LECO. Wannan ƙungiya ce daga layin Jinko (marubuta kamar Mao Jie da Wang Zhao sun fito daga Haining Jinko), wanda ke nufin wannan haɗin boron-diffusion-plus-gridline mai yiwuwa ya riga ya gudanar da DOE akan layin M10, ba girke-girke na dakin gwaje-gwaje ba.
Bayan Surface: Double Poly-Si Shi ne Babban Aiki
Sashin bayan-surface shine mafi yawan ɓangaren injiniya a cikin takardar gaba ɗaya (Figures 3 da 4).
Kowa ya san tarkon da tsarin n+-poly / SiOx na gargajiya ya shiga:
A lokacin harba manna azurfa, Ag yana gangarowa zuwa ga substrate tare da iyakokin hatsi, yana haifar da jihohin mu'amala, kuma lalacewa ta haske da duhu suna tashi tare.
Idan poly Layer yayi kauri sosai, sha na baya yana cinye bifaciality; idan yayi siriri sosai, passivation da lamba ba za su iya tsayawa ba.
Maganin nan shine Layer biyu na tunnel oxide poly-Si a gefen baya (Hoto 3 TEM yana bayyana bambancin crystallinity da rarraba doping tsakanin Layers biyu):
Layer na waje yana karkata zuwa "tsaro": toshe yaduwar azurfa, kiyaye passivation na mu'amala daga lalacewa ta hanyar metallization.
Layer na ciki yana karkata zuwa "hari": babban crystallinity tare da danne maida hankali na P mara aiki a gefen substrate, don haka ingancin passivation yana tashi (Hoto 4's iVoc da j0 data suna goyan bayan wannan).
Poly Layer da aka sirirta a gida (mai yiwuwa LCO ko wuraren taga da aka bude da Laser): watsawa na baya yana tashi, bifaciality ya kai 88.3%.
A cikin kwatancen Hoto 4, rukunin double-poly dangane da tushen single-poly:
Voc ya tsaya (godiya ga Layer na ciki mai babban crystallinity da ƙananan phosphorus mara aiki).
Ba a sadaukar da FF ba (an dakatar da yaduwar azurfa ta hanyar Layer na waje, juriyar tuntuɓar ba ta tashi ba).
Bifaciality yana tashi daga TOPCon na al'ada ~80% zuwa 88.3%, kuma wannan yana da mahimmanci ga farashin BOS fiye da 0.3% akan takardar inganci.
Aikace-aikacen Samfur
Ka daina tunanin "Takardar Nature, dole ne ta yi tsada". Ga duk wanda ke gudanar da layin n-TOPCon, akwai abubuwa uku a nan da za ka iya kwafa kai tsaye:
Ka daina manne wa tsohon menu na 80-100 ohm/sq don boron emitter. Ka tura shi sama, ka sake lissafin gridlines, ka sake daidaita taga LECO, kuma 0.2-0.3% abs a saman gaba yana da gaske.
Ka canza poly na baya daga Layer guda zuwa biyu. Layer na waje ba lallai ba ne mai tsada, kawai ƙarin CVD Layer ne, amma yaduwar azurfa a matsayin yanayin gazawar ɓoye haƙiƙanin kuɗi ne a tsawon rayuwar shekaru 25 na bifacial module.
Ka yi cinikin poly thinning na gida don bifaciality. Yana da kyau fiye da inganta gilashi da encapsulant kawai. 88% bifaciality tare da tracker, kuma lissafin farashin kWh a ƙarshen shuka yana magana da kansa.
Tabbas akwai tarko: kasafin zafi na poly-Layer biyu, yawan aiki da daidaiton siraran Laser na gida, da kuma girman gyaran idan aka kwatanta da saitin layi na yanzu. Takardar ba za ta bayyana waɗannan ba, amma Jinko ya yi ƙarfin hali ya fitar da ingantaccen takardar shaida, wanda ke nuna aƙalla layin gwaji na M10 yana aiki lafiya.
Tambaya mai buɗe: a cikin kasafin zafi na TOPCon na yanzu na 1300+ boron high-temperature diffusion da LECO, shin ya kamata ku ƙara wani Layer na gyaran Laser na zaɓi a saman (kamar hanyar UV-ps a cikin takardar Wang Q na 26.35%)? Ko kuma poly na baya biyu ya riga ya cinye cinikin triangle na passivation-contact-bifaciality zuwa iyakarsa, ma'ana mataki na gaba ya kamata ya canza zuwa tsarin BC maimakon ci gaba da matse TOPCon?
Ra'ayin Ooitech
Abin da ke da ban sha'awa a nan shi ne, duka waɗannan levers, boron emitter mai juriya da yawa da kuma rear double poly, suna rayuwa kusan gaba ɗaya a gefen cell, amma sakamakon yana bayyana a matakin module ta hanyar wannan 88.3% bifaciality. A kan layin module, mafi girman bifaciality yana canza yadda kuke tunani game da layup, zaɓin backsheet ko glass, da kuma tashin hankali na stringer don ƙananan, mafi raunin cells, don haka taga tsari a gefen module dole ne ya motsa da shi. A matsayin masu gina layin module turnkey da ke aiki a kan tsari daban-daban daga M10 zuwa shingled da TOPCon, muna kallon waɗannan canje-canje a matakin cell sosai, saboda suna saita gudun abin da layin ƙasa zai iya ɗauka. Idan kuna son ganin yadda layin samar da module na zamani yake aiki, tashar YouTube ta Ooitech a www.youtube.com/ooitech yana da daraja a bi.
