Chii chinorehwa nebhatiri reTOPCon?
Zita rakazara reTOPCon ndiTunnel Oxide Passivating Contacts, izvo zvinoreva Tunneling Oxide Passivated Contacts, tekinoroji yemhando yeN silicon wafer cell yakatangwa muna 2013. TOPCon cells, kureva Tunneling Oxide Passivated Contacts solar cells, dzakagadzirirwa kuvandudza mashandiro emagetsi ezuva nekugadzirisa dambudziko rekusarudza passivation yemagetsi ari musero.
Nzvimbo yepamberi yemasero eTOPCon uye chimiro chemasero ezuva chemhando yeN zvakafanana, musiyano mukuru uri kumashure kwesero kugadzirira jira resilicon oxide rakatetepa zvakanyanya, uye ipapo jira rakatetepa resilicon rakaiswa doped, zviviri izvi pamwe chete zvinoumba chimiro chekubatana chisina kubatwa, zvichideredza zvinobudirira chikamu chekubatana pamusoro uye chikamu chekubatana chesimbi.
Nekuda kwesimba rakanaka resilicon oxide rakatetepa uye firimu resilicon rakanyoroveswa zvakanyanya rinoita kuti mabhandi esimba repamusoro esilicon wafer agadzire kukotama, nokudaro zvichigadzira simba repasi, mikana yekutenderera kwemaerekitironi yakawedzera zvakanyanya, kuramba kwekubatana kunoderera, uye pakupedzisira kunovandudza kushanda kwekushandura.
Sei TOPCon iri kutsiva tekinoroji yePERC?
Muna 2023, indasitiri yePV yakaona budiriro huru nekuwedzera kwesimba idzva rekugadzira TOPCon rinodarika 400GW. Zvinotarisirwa kuti tekinoroji yeTOPCon cell ichapfuura PERC yechinyakare kuti ive tekinoroji itsva panosvika 2024. Panyaya yekugadzira, zvinotarisirwa kuti kugadzirwa kweTOPCon kuchasvika pa100GW gore rino, zvichireva 20%-30% yehuwandu hwese hwekugadzira masero ePV. Senzira yemasero emhando yeN inodhura zvakanyanya, masero eTOPCon anoonekwa seanogona kugadzirwa zvakanaka uye asina kusimba, uye mamiriro ekupa akawandisa acharamba aripo gore rese. Nekuvandudzwa kuri kuramba kuchiitwa kwekushanda kwemabhatiri eTOPCon, nzvimbo yepamusoro yemabhatiri eTOPCon emhando yeN inotarisirwa kuwedzera, izvo zvichave nemhedzisiro yakanaka pakukura kwebhizinesi remakambani akakodzera.
Bhatiri remhando yeN harisati raona kuti nyaya huru yekuwedzera kugadzirwa kukuru ndeyekuti kushanda kwaro uye mabhatiri emhando yeP hazvina kuvhura mukaha wakakura pakati pemutengo usiri wesilicon we30% -40% wakakwira kupfuura bhatiri rePERC. Kushanda zvakanaka kwebhatiri rePERC kwave pedyo nedenga, nzvimbo yekuderedza mutengo wenzvimbo yave mishoma, asi kushanda zvakanaka kwebhatiri reTOPCon kuti rivandudzwe kuchiri nemukana mukuru. Sekureva kwedata rePV Infolink, mutengo wemazuva ano wemasero eTOPCon asiri wesilicon uri pedyo ne$0.3 pawatt, zvichienzaniswa nemutengo wemasero makuru ePERC uri pakati pe$0.21-0.23 pawatt, uye kuchine mukaha. Zvisinei, nekuedza kunotevera, mutengo wekugadzira masero eTOPCon uchasvika zvishoma nezvishoma padanho remasero ePERC.
Ndezvipi zvakanakira bhatiri reTOPCon?
1. Kubatsira kwepasi: mashandiro epasi pemvura anonyanya kutsamira papasi pemvura uye pasi pemvura, kukura kweSiO2 mukupisa kune kugona kwakanaka kwepasi pemvura. Kuisa polysilicon yakawanda kunogona kukonzera kuti simbi yesilicon ikotame, zvichikonzera kuunganidzwa kwevanotakura simbi vakawanda uye kupera kwevanotakura simbi vashoma panzvimbo inopindirana, zvichideredza composite uye kuita basa repasi pemvura.
2. Kubatsira kwesimbi contact composite: simbi contact composite inova dambudziko rinodzikisa kushanda kwechimiro chemazuva ano chesolar cell. Kugadzirwa kwesimbi kunowanzo kuve kudhindwa kwechidzitiro mushure mekupiswa nekupisa kwakanyanya, kupisa kwakanyanya kunotonhora kunokonzeresa metal paste "ichapwanya" poly-Si kuti igadzire "kupwanya" (Spiking), ichiparadza passivation yechimiro chekubatana, zvichikonzera kuti nzvimbo yekubatana nesimbi yeJ0c yakakwira munzvimbo yekubatana nesimbi pane munzvimbo isina kupwanya. Asi p + poly uye n + poly metal contact composite, kunyangwe "kupwanya" kuchizoparadza passivation contact structure yekesi inogona kuita kuti simbi composite ive yakaderera zvikuru pane iyo yakajairika emitter / back field.
3. Kubatsira kwesimbi inobatika: Kuwedzera kune simbi inobatika, metal-semiconductor contact resistivity (ρc) kwakakoshawo pakushanda kwemidziyo ye crystalline silicon solar cells, metal-semiconductor kuti igadzire ohmic contact yakanaka kubatsira kuderedza kurasikirwa kwesimba uye kuvandudza fill factor.
