Hauv kev lag luam photovoltaic uas hloov pauv sai sai, HJT (Heterojunction) thiab TOPCon (Tunnel Oxide Passivated Contact) tau yog cov ntsiab lus tseem ceeb ntawm kev lag luam. Txawm li cas los xij, nrog kev qhia txog cov ntaub ntawv perovskite, HJT ua ke nrog perovskite tau txais kev saib xyuas rau nws cov txiaj ntsig tshwj xeeb, ua ib qho teeb meem kub hauv kev lag luam hnub ci. Tsab xov xwm no tshawb nrhiav cov txiaj ntsig ntawm HJT ua ke nrog perovskite dua TOPCon thiab qhov kev sib xyaw ua ke no ua rau yav tom ntej ntawm kev siv tshuab photovoltaic zoo li cas.
1. Kev Taw Qhia Txog HJT Technology
HJT paub txog nws qhov kev hloov pauv photoelectric siab thiab kev ua tau zoo heev hauv cov xwm txheej tsis muaj teeb. Nws tsim ib qho heterojunction los ntawm kev sib sau ua ke ntawm cov yeeb yaj kiab nyias nyias silicon rau ntawm cov khoom siv crystalline silicon, txo cov khoom sib xyaw ua ke thiab txhim kho lub cell qhov qhib-circuit voltage thiab luv-circuit tam sim no.
2. Cov Teeb Meem Nrog TOPCon Technology
TOPCon ua tiav qhov kev ua kom lub ntsej muag tsis muaj zog los ntawm kev siv ib txheej oxide thiab ib txheej polycrystalline silicon rau ntawm qhov chaw ntawm lub cell, txo qhov kev poob ntawm kev sib xyaw ua ke. Txawm li cas los xij, kev ua tiav kev ua haujlwm zoo dua nrog TOPCon ntsib cov teeb meem, suav nrog cov txheej txheem nyuaj, kev tswj hwm tus nqi, thiab qhov nyuaj ntawm kev txhim kho kev ua haujlwm ntxiv.
3. Lub Luag Haujlwm ntawm Cov Khoom Siv Perovskite
Cov ntaub ntawv Perovskite zoo tagnrho rau kev ua kom lub hnub ci ua haujlwm tau zoo vim lawv cov coefficient nqus tau siab, qhov sib txawv ntawm cov kab sib txawv, thiab qhov xwm txheej ua tau raws li cov kua. Los ntawm kev sib txuas perovskite nrog HJT thev naus laus zis, nws muaj peev xwm siv HJT qhov ua haujlwm siab thiab txhim kho nws ntxiv los ntawm cov khoom nqus dav dav ntawm perovskite.
4. Cov txiaj ntsig ntawm HJT ua ke nrog Perovskite
a. Kev Ua Haujlwm Zoo Tshaj Plaws ntawm Photoelectric Conversion:Qhov ntxiv ntawm perovskite ua rau cov lus teb spectral ntawm HJT cell nthuav dav heev, ua rau cov duab tsim tau ntau dua. HJT cell, nrog rau qhov kev ua haujlwm theoretical ntawm 27.5%, twb dhau qhov kev siv tshuab PV ib txwm muaj. Cov qauv heterojunction, hloov pauv amorphous thiab crystalline silicon txheej, ua rau lub teeb nqus tau zoo tshaj plaws, txhim kho kev hloov pauv zog.
b. Kev Ruaj Ntseg Zoo Dua:HJT cell tsis yog tsuas yog muaj kev ua haujlwm zoo dua xwb tab sis kuj muaj kev ruaj khov zoo dua. Lub HJT-perovskite tandem qauv tswj kev ua haujlwm zoo dua nyob rau hauv kev ua haujlwm ntev, tsis zoo li TOPCon-perovskite, uas, txawm tias tus nqi tsim khoom qis dua, tab sis muaj teeb meem sib piv HJT hauv kev ua haujlwm zoo.
c. Cov Txheej Txheem Tsim Khoom Yooj Yim:Qhov xwm txheej uas cov khoom siv perovskite ua tau raws li cov tshuaj ua tau txo cov nqi tsim khoom, uas yog qhov tseem ceeb rau kev txo cov nqi hluav taws xob (LCOE). HJT cells kuj muaj qhov zoo dua hauv kev tsim khoom, siv cov tshuaj lom neeg vapor deposition (CVD) uas kub qis los tso cov txheej amorphous silicon, ua raws li cov oxide conductive pob tshab (TCO) thiab cov txheej p-hom lossis n-hom amorphous silicon. Cov txheej txheem yooj yim no txo cov nqi thiab txhim kho cov nqi tsim khoom piv rau TOPCon cov txheej txheem annealing kub siab, uas ua rau cov nqi tsim khoom thiab kev hloov pauv zoo nce ntxiv.
d. Kev Tsim Khoom Uas Zoo Rau Ib Puag Ncig:Cov ntaub ntawv Perovskite muab cov txheej txheem tsim khoom zoo dua rau ib puag ncig vim lawv tsis muaj cov khoom lom lossis cov khoom tsis tshua muaj. Tsis zoo li qee cov ntaub ntawv PV uas xav tau cov khoom txaus ntshai xws li cov hlau lead lossis cadmium, perovskites tsis muaj cov tshuaj lom no, txo cov kev pheej hmoo ib puag ncig thiab kev noj qab haus huv. Ntxiv mus, perovskites tsis vam khom cov khoom tsis tshua muaj, uas lawv cov kev rho tawm tuaj yeem ua rau ib puag ncig puas tsuaj. Lawv cov khoom siv siv zog tsawg dua, ua rau cov pa roj carbon tsawg dua.
Xaus lus, kev sib xyaw ua ke ntawm HJT thiab perovskite sawv cev rau kev coj ua zoo rau kev nce qib photovoltaic yav tom ntej, nrog nws cov txiaj ntsig hauv kev ua haujlwm zoo, kev ruaj khov, kev siv nyiaj tsim nyog, thiab kev ruaj khov ib puag ncig zoo dua TOPCon hauv ntau yam.
