He aha te tikanga o te pākahiko TOPCon?
Ko te ingoa katoa o TOPCon ko Tunnel Oxide Passivating Contacts, ko tōna tikanga ko Tunneling Oxide Passivated Contacts, he hangarau pūtau wafer silicon momo-N i whakaarohia i te tau 2013. Ko ngā pūtau TOPCon, arā, ko ngā pūtau solar Tunneling Oxide Passivated Contacts, he mea hanga hei whakapai ake i te whai huatanga o ngā pūtau solar mā te whakaoti rapanga o te passivation whiriwhiri o ngā kaikawe i roto i te pūtau.
He rite tonu te hanganga o te mata o mua o te pūtau TOPCon me te hanganga o te pūtau solar momo-N tuku iho, ko te rerekētanga matua ko te tuara o te pūtau hei whakarite i tētahi paparanga o te waikura silicon tino angiangi, kātahi ka hangaia he paparanga angiangi o te whakatakotoranga silicon kua pania, ka hangaia ngātahitia he hanganga whakapā kua whakakorehia, ka whakaitihia te mata o te hiato me te hiato whakapā whakarewa.
Nā te pai o te pānga whakakorekore o te waikura silicon tino angiangi me te kiriata silicon kua pania nuitia, ka piko ngā whitiki pūngao mata o te anga silicon, ā, ka puta he pānga whakakorekore mara, ka piki ake te tūponotanga o te whakaurunga irahiko, ka heke te ātete pa, ā, i te mutunga ka pai ake te whai huatanga o te huringa.
He aha te take e whakakapia ai te hangarau PERC e TOPCon?
I te tau 2023, i kite te umanga PV i tētahi whanaketanga nui me te tāpiri atu i te neke atu i te 400GW o te kaha whakaputa hou o TOPCon. E matapaetia ana ka hipa ake te hangarau pūtau TOPCon i te PERC tuku iho kia noho hei hangarau matua hou i te tau 2024. Mō te whakaputanga, e matapaetia ana ka eke te whakaputanga TOPCon ki te 100GW i tēnei tau, e 20%-30% o te whakaputanga pūtau PV katoa. Hei huarahi pūtau momo-N tino whai hua, e kiia ana ko ngā pūtau TOPCon he kounga teitei me te kaha whakaputa iti, ā, ka mau tonu te āhuatanga o te tuku nui atu i te tono puta noa i te tau. Mā te whakapai tonu i te whai huatanga o te pākahiko TOPCon, e matapaetia ana ka whānui ake te wāhi pākahiko TOPCon momo-N, ka whai pānga pai ki te pikinga pakihi o ngā kamupene e tika ana.
Kāore anō kia kitea e te pākahiko momo-N te take matua o te whakawhānui i te whakaputanga nui ko tōna whai huatanga me ngā pākahiko momo-P kāore i whakatuwhera i tētahi āputa nui i waenga i te utu kore-silicon he 30% -40% teitei ake i te pākahiko PERC. Kua tata te whai huatanga o te pākahiko PERC ki te tuanui, kua iti te wāhi hei whakaiti i te utu o te wāhi, engari he nui tonu te kaha o te pākahiko TOPCon ki te whakapai ake. E ai ki ngā raraunga a PV Infolink, ko te utu kore-silicon o nāianei o ngā pūtau TOPCon he tata ki te $0.3 ia watt, ki te whakaritea ki te utu o ngā pūtau PERC rahi-rahi i waenga i te $0.21-0.23 ia watt, ā, kei te mau tonu te āputa. Heoi, me ngā mahi tonu e whai ake nei, ka tata haere te utu whakaputa o ngā pūtau TOPCon ki te taumata o ngā pūtau PERC.
He aha ngā painga o te pākahiko TOPCon?
1. Te painga o te whakakorenga: ko te mahi whakakorenga mata e whakawhirinaki ana ki te whakakorenga matū me te whakakorenga mara, he tino pai te kaha o te tipu wera o te SiO2 ki te whakakorenga matū. Mā te tāpiri nui ki te polysilicon ka taea te whakapiko i te roopu pūngao o te silicon, ka hua ake te whakakotahitanga o ngā kaikawe nuinga me te whakahekenga o ngā kaikawe tokoiti i te atanga, ka whakaitihia te hiato me te mahi i te mahi whakakorenga mara.
2. Te painga o te hiato whakapā whakarewa: ka noho te hiato whakapā whakarewa hei aukati e whakawhāiti ana i te whai huatanga o te hanganga pūtau solar tikanga. Ko te ahumahi o te whakarewatanga he tā mata i muri i te sintering pāmahana teitei, ka "toia" e te tukanga sintering pāmahana teitei te poly-Si hei hanga i te "pokanga" (Spiking), ka whakangaro i te passivation o te hanganga whakapā, ka hua ake he nui ake te horahanga whakapā whakarewa o te J0c i roto i te rohe whakapā whakarewa i te rohe passivated. Engari ko te p + poly me te n + poly hiato whakapā whakarewa, ahakoa ka whakangaromia e te "pokanga" te hanganga whakapā passivation o te keehi ka taea te hanga i te hiato whakarewa kia iti ake i te mara emitter/muri tikanga.
3. Te painga o te ātete pa ki te konganuku: haunga te hiato pa ki te konganuku, he mea nui anō hoki te ātete pa ki te konganuku-haurua-arataki (ρc) ki te mahi a te taputapu o ngā pūtau rā silicon tioata, kia pai ai te pa o te konganuku-haurua-arataki hei āwhina i te whakaiti i te ngaronga ātete me te whakapai ake i te tauwehe whakakī.
