Kev paub

Txheej txheem cej luam ntawm Topcon photovoltaic module technology thiab qhov zoo

TOPCon (Tunnel Oxide Passivated Contact) photovoltaic (PV) module technology sawv cev rau qhov kev nce qib tshiab hauv kev lag luam hnub ci rau kev txhim kho cell efficiency thiab txo cov nqi. Lub hauv paus ntawm TOPCon thev naus laus zis nyob hauv nws qhov tshwj xeeb passivation hu rau cov qauv, uas ua rau txo cov cab cab rov ua dua ntawm lub xov tooj ntawm tes, yog li txhim kho lub xov tooj ntawm tes hloov dua siab tshiab.

Technical Highlights

1. Passivation Contact Structure: TOPCon hlwb npaj ib txheej super-thin oxide silicon (1-2nm) nyob rau sab nraum qab ntawm silicon wafer, ua raws li cov deposition ntawm doped polycrystalline silicon txheej. Cov qauv no tsis yog tsuas yog muab kev sib txuas lus zoo xwb tab sis kuj tsim cov kev xaiv thauj khoom thauj channel, tso cai rau cov neeg nqa khoom feem ntau (electrons) hla dhau thaum tiv thaiv cov neeg nqa khoom tsawg (qhov) los ntawm kev sib txuas, yog li ua kom lub xov tooj ntawm tes qhib qhov hluav taws xob (Voc) thiab sau. factor (FF).

2. High conversion efficiency: Lub theoretical siab tshaj plaws efficiency ntawm TOPCon hlwb yog siab li 28.7%, ho siab tshaj li 24.5% ntawm tsoos P-hom PERC hlwb. Hauv kev siv tswv yim, kev ua haujlwm loj ntawm TOPCon hlwb tau tshaj 25%, nrog rau kev txhim kho ntxiv.

3. Low Light-Induced Degradation (LID): N-hom silicon wafers muaj qhov qis qis qis qis, txhais tau tias TOPCon modules tuaj yeem tswj tau qhov kev ua tau zoo dua qub hauv kev siv tiag tiag, txo qis kev ua haujlwm tau ntev.

4. Optimized Temperature Coefficient: Qhov kub coefficient ntawm TOPCon modules yog zoo dua li ntawm PERC modules, uas txhais tau hais tias nyob rau hauv high-temperature ib puag ncig, lub zog tsim poob ntawm TOPCon modules yog me me, tshwj xeeb tshaj yog nyob rau hauv lub teb chaws sov thiab suab puam cheeb tsam qhov twg qhov zoo dua yog tshwj xeeb tshaj yog tshwm sim.

5. compatibility: TOPCon thev naus laus zis tuaj yeem ua tau raws li cov kab tsim khoom PERC uas twb muaj lawm, tsuas yog yuav tsum muaj ob peb yam khoom ntxiv, xws li boron diffusion thiab cov khoom siv ua yeeb yaj kiab nyias nyias, tsis tas yuav tsum muaj qhov qhib rov qab thiab sib dhos, ua kom yooj yim rau cov txheej txheem ntau lawm.

Cov Txheej Txheem Ua

Cov txheej txheem tsim khoom ntawm TOPCon hlwb feem ntau suav nrog cov kauj ruam hauv qab no:

1. Kev npaj Silicon Wafer: Ua ntej, N-hom silicon wafers yog siv los ua cov khoom siv hauv lub cell. N-hom wafers muaj ntau dua cov neeg nqa khoom tsawg dua lub neej thiab zoo dua lub teeb tsis muaj zog.

2. Oxide Txheej Deposition: Ib txheej super-thin oxide silicon tso rau sab nraum qab ntawm silicon wafer. Lub thickness ntawm no oxide silicon txheej feem ntau yog nruab nrab ntawm 1-2nm thiab yog tus yuam sij rau kev ua tiav kev sib cuag passivation.

3. Doped Polycrystalline Silicon Deposition: Ib txheej doped polycrystalline silicon yog tso rau ntawm oxide txheej. Cov txheej txheej polycrystalline silicon no tuaj yeem ua tiav los ntawm kev siv tshuaj lom neeg tsawg (LPCVD) lossis plasma-enhanced chemical vapor deposition (PECVD) technology.

4. Kev kho mob Annealing: Kub-kub annealing kev kho mob yog siv los hloov cov crystallinity ntawm polycrystalline silicon txheej, yog li activating passivation kev ua tau zoo. Cov kauj ruam no yog qhov tseem ceeb rau kev ua tiav qhov kev sib txuas qis qis thiab kev ua haujlwm siab ntawm tes.

5. Metallization: Hlau kab sib chaws thiab cov ntsiab lus sib tiv tauj yog tsim nyob rau pem hauv ntej thiab sab nraub qaum ntawm lub xov tooj ntawm tes kom khaws cov duab tsim tawm. Cov txheej txheem metallization ntawm TOPCon hlwb yuav tsum tau saib xyuas tshwj xeeb kom tsis txhob ua rau cov qauv kev sib cuag passivation.

6. Kev Ntsuas thiab Kev Ntsuas: Tom qab kev tsim khoom ntawm tes ua tiav, kev ntsuas hluav taws xob ua haujlwm tau ua kom ntseeg tau tias lub hlwb ua tau raws li cov qauv kev ua haujlwm tau ua tiav. Cov hlwb ces raug txheeb raws li kev ua haujlwm tsis tau ua kom tau raws li qhov xav tau ntawm kev lag luam sib txawv.

7. Module Assembly: Cov hlwb tau sib sau ua ke rau hauv cov qauv, feem ntau encapsulated nrog cov ntaub ntawv xws li iav, EVA (ethylene-vinyl acetate copolymer), thiab cov ntaub ntawv rov qab los tiv thaiv cov hlwb thiab muab kev txhawb nqa.

Qhov zoo thiab qhov nyuaj

Qhov zoo ntawm TOPCon thev naus laus zis yog nyob rau hauv nws cov kev ua haujlwm siab, qis qis, thiab qhov kub thiab txias coefficient, tag nrho cov uas ua rau TOPCon modules ua haujlwm tau zoo dua thiab muaj lub neej ntev dua hauv kev siv tiag tiag. Txawm li cas los xij, TOPCon thev naus laus zis tseem ntsib teeb meem cov nqi, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm cov cuab yeej pib nqis peev thiab cov nqi tsim khoom. Nrog kev nce qib thev naus laus zis txuas ntxiv thiab txo tus nqi, nws xav tias tus nqi ntawm TOPCon hlwb yuav maj mam txo qis, txhim kho lawv cov kev sib tw hauv kev lag luam photovoltaic.

Hauv cov ntsiab lus, TOPCon thev naus laus zis yog ib qho tseem ceeb rau kev txhim kho kev lag luam photovoltaic. Nws txhim kho kev hloov dua siab tshiab ntawm lub hnub ci hlwb los ntawm kev tsim kho thev naus laus zis thaum tswj kev sib raug zoo nrog cov kab ntau lawm, muab kev txhawb zog rau kev txhim kho kev lag luam photovoltaic. Nrog kev txhim kho thev naus laus zis tsis tu ncua thiab txo tus nqi, TOPCon photovoltaic modules yuav tsum ua tus thawj tswj hwm kev lag luam photovoltaic yav tom ntej.