Imirasire y'izuba ya perovskite igera kuri 23.9% ikora neza, iramba

Itsinda ry’abahanga muri Amerika-Kanada ryakoresheje molekile ya Lewis kugirango irusheho kwangirika kwizuba muri selile yizuba ya perovskite.Itsinda ryakoze igikoresho gifite amashanyarazi maremare afunguye kandi afite imbaraga zidasanzwe.

Itsinda ry’ubushakashatsi muri Amerika-Kanada ryahimbye perovskite ihindagurikaizubaukoresheje Lewis base molekules ya passivation yo hejuru.Ibishingwe bya Lewis bikoreshwa mubushakashatsi bwizuba bwa perovskite kugirango passivate inenge zubuso bwa perovskite.Ibi bifite ingaruka nziza kurwego rwo guhuza ingufu, guhuza imiyoboro ya interineti, imyitwarire ya hystereze, no guhagarara neza.

Abashakashatsi bagize bati: "Lewis shingiro, ihwanye cyane na electronegativite, biteganijwe ko izagena ingufu zihuza no guhuza imipaka n’imipaka y’ingano". Urwego Urwego.“Molekile ya Lewis ifite atome ebyiri zitanga electron zirashobora guhuza no guhuza ikiraro n’imipaka y’ubutaka, bigatanga ubushobozi bwo kongera imbaraga no gushimangira ubukana bw’imirasire y'izuba ya perovskite.”

Abashakashatsi bakoresheje molekile ya diphosphine Lewis izwi ku izina rya 1,3-bis (diphenylphosphino) propane (DPPP) kugira ngo bahoshe imwe muri halide perovskite itanga icyizere - formamidinium yode iode izwi ku izina rya FAPbI3 - kugira ngo ikoreshwe mu cyuma gikurura ingirabuzimafatizo.

Bashyize igipande cya perovskite kumurongo wa DPPP wapakurura umwobo (HTL) wakozwe na nikel (II) oxyde (NiOx).Babonye ko molekile zimwe za DPPP zongeye gushonga no gutandukanywa haba kuri perovskite / NiOx ndetse no mu turere twa perovskite, kandi ko kristu ya firime ya perovskite yateye imbere.Bavuze ko iyi ntambwe yazamuye Uwitekaubukanishiubukana bwa perovskite / NiOx Imigaragarire.

Abashakashatsi bubatse selile hamwe na substrate ikozwe mu kirahure na tin oxyde (FTO), HTL ishingiye kuri NiOx, urwego rwamethyl-yasimbuwe na karbazole. guhuza ibyuma bikozwe mu ifeza (Ag).

Itsinda ryagereranije imikorere ya selile yizuba ya DPPP nigikoresho cyifashisha kitanyuze mu buvuzi.Ingirabuzimafatizo ya doped yageze ku mikorere ya 24.5%, imbaraga zifunguye zingana na 1.16 V hamwe nuzuza 82%.Igikoresho kidapfunduwe cyageze ku gipimo cya 22,6%, umuyagankuba ufunguye uruziga rwa 1.11 V hamwe no kuzuza 79%.

Abahanga mu bya siyansi bagize bati: "Iterambere ry’ibintu byuzuzanya hamwe n’umuvuduko w’amashanyarazi byemeje ko igabanuka ry’ubucucike bw’imbere kuri NiOx / perovskite imbere y’imbere ya DPPP".

Abashakashatsi bubatse kandi selile ikoporora ifite ubuso bwa cm 1.05 cm2 yageze ku guhindura imbaragaimikorere igera kuri 23.9%kandi yerekanye ko nta gutesha agaciro nyuma ya 1.500 h.

Umushakashatsi Chongwen Li yagize ati: "Hamwe na DPPP, mu bihe bidukikije - ni ukuvuga ko nta yandi mashyushya yongeyeho - uburyo rusange bwo guhindura amashanyarazi bwakomeje kuba hejuru mu masaha agera ku 3.500".“Imirasire y'izuba ya perovskite yasohotse mbere mu bitabo ikunda kubona igabanuka rikomeye mu mikorere yabo nyuma y'amasaha 1.500 kugeza 2000, bityo rero ni iterambere ryinshi.”

Itsinda, riherutse gusaba ipatanti ya tekinike ya DPPP, ryerekanye tekinoroji y’akagari muri “Igishushanyo mbonera cya molekile fatizo ya Lewis yaitajegajega kandi ikora neza ihindagurika ya perovskite izuba, ”Iherutse gusohoka mu bumenyi.Iri tsinda ririmo abize muri kaminuza ya Toronto muri Kanada, ndetse n'abahanga bo muri kaminuza ya Toledo, kaminuza ya Washington, na kaminuza ya Northwestern muri Amerika.