Gyaran Lantarki Biyu-Bangare Ya Kara M10 TOPCon zuwa 26.66%
Gabatarwar Samfur
"Shin TOPCon da gaske zai iya fitar da wani 0.5%? Iyakar Auger ta riga ta kasance a gabanmu."
Wannan layin hutun yana taƙaita damuwar gama gari na duk wanda ke tafiyar da layin n-TOPCon a cikin shekaru biyu da suka gabata. M10 cikakkun sel, ingancin samarwa 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 Aikin 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%, Daga Ina Wannan Sabon Mataki Ya Fito
Labaran "ingancin TOPCon" a cikin shekarar da ta gabata da gaske sun ɗan gaji. 26.1%, 26.35%, galibi gyare-gyaren zaɓi na Laser ko ƙananan gyare-gyaren boron emitter. A wannan karon layin Jinko ya yanke ɓangarorin biyu a lokaci guda:
Gaban gaba: boron emitter mai juriya mai girma tare da inganta tsarin gridline, rage sake haɗuwa da asarar sufuri.
Fuska ta 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 cikakkun sel na masana'antu, ba ƙananan gwaje-gwaje ba.
Wannan 88.3% bifaciality ya fi jan hankali fiye da cikakken inganci a duniyar n-TOPCon, kuma zan bayyana dalili daga baya.
Fuska ta gaba: Boron Emitter mai High-Sheet-Resistance, Ka yi ƙarfin hali ya tura shi
Tsohuwar i-TOPCon fuska ta gaba: boron diffusion ya yi nauyi sosai kuma Auger da tattara haɗuwa suna fashewa; idan ya yi sauƙi, juriya ta gefen emitter ta yi girma, halin yanzu a ƙarƙashin yatsu masu kyau ba za a iya tattara shi ba, kuma kana komawa ga tilasta lamba tare da LECO.
Abin da wannan takarda ta yi (duba jerin Figure 2):
A hankali tura boron emitter sheet resistance sama, da zarar ingancin passivation yana nan kuma blue response ya kiyaye.
Sake gudanar da tsarin busbar/finger don asarar sufuri ta gefe ta sake ci a matakin gridline.
A gefen metallization, yi amfani da hanyar nano Joule-heating (tushen aikin tawagarsu guda a cikin Zhou et al., Small 2025 yana cikin nassoshi) don danne juriyar lamba ta Ag-Si.
Kwatanta IQE/PL na Figure 2 ya nuna shi: yawan juriyar sake haɗuwa a saman gaba j0 na emitter mai juriya mai girma ya ragu a fili, kuma fill factor bai rushe ba, wanda ke nufin inganta layin grid da lambar gida ya gyara bangaren sufuri.
Ra'ayin injiniyan layi: babban tarko tare da emitter boron mai juriya mai girma ba aikin lantarki ba ne, shi ne buga taga firing-through da dacewa da tsarin LECO. Wannan tawaga ce daga layin Jinko (marubuta kamar Mao Jie da Wang Zhao daga Haining Jinko), wanda ke nufin wannan haɗin boron-diffusion-da-gridline ya riga ya gudanar da DOE akan layin M10, ba girke-girke na dakin gwaje-gwaje kawai ba.
Bayan Fage: Double Poly-Si Shi ne Babban Aiki
Sashin bayan fage shine mafi yawan ɓangaren da injiniyoyi ke fuskanta a cikin takardar gaba ɗaya (Figures 3 da 4).
Kowa ya san matsalolin 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.
Poly Layer yayi kauri sosai kuma shayar da baya na parasitic yana cinye bifaciality; idan yayi siriri sosai, passivation da lamba ba za su iya tsayawa ba.
Maganin a nan shine bayan-gefe biyu-Layer tunnel oxide poly-Si (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 ya tashi (bayanan iVoc da j0 na Hoto 4 sun tabbatar da wannan).
Poly Layer da aka sirirta a gida (mai yiwuwa LCO ko yankunan taga da Laser ya bude): watsawa ta baya ta tashi, bifaciality ta kai 88.3%.
A cikin kwatancen lanƙwasa na Hoto 4, rukunin biyu-poly dangane da tushe guda-poly:
Voc ya tsaya (godiya ga babban crystallinity na Layer na ciki da ƙarancin 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 da 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 daya zuwa biyu. Layer na waje ba lallai ba ne mai tsada, kawai ƙarin CVD Layer ne, amma yaduwar azurfa a matsayin yanayin gazawar ɓoye yana da kuɗi na gaske 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 mai Layer biyu, yadda ake samun daidaito da kuma yawan aiki na rage kauri ta hanyar Laser, da kuma girman gyaran idan aka kwatanta da tsarin layin da ake da shi. Takardar ba za ta bayyana waɗannan ba, amma Jinko ya yi ƙarfin hali ya fitar da ingancin da aka tabbatar, wanda ke nuna aƙalla layin gwaji na M10 yana aiki lafiya.
Tambaya mai buɗe ido: a cikin kasafin zafi na TOPCon na yanzu na 1300+ boron diffusion mai zafi 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 ya riga ya cinye ma'amalar triangle na passivation-contact-bifaciality har iyakarta, 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 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 stringer tension don ƙananan, ƙarin brittle 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 nau'ikan 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 biyan kuɗi.
