Iqela lase-US-Canadian lezenzululwazi lisebenzise i-Lewis base molecules ukuphucula i-surface passivation kwi-cell perovskite solar.Iqela livelise isixhobo esinombane ophezulu ovulekileyo wesekethe kunye namanqanaba azinzo amangalisayo.
Iqela lophando lase-US-Canadian lenze i-perovskite eguquliweyoiseli yelangangokusebenzisa iimolekyuli ze-Lewis kwi-passivation yomhlaba.Iziseko ze-Lewis zisetyenziswa ngokubanzi kuphando lwelanga lwe-perovskite ukudlula iziphene zomhlaba kwi-perovskite layer.Oku kunemiphumo emihle kukulungelelaniswa kwenqanaba lamandla, i-interfacial recombination kinetics, ukuziphatha kwe-hysteresis, kunye nokuzinza kokusebenza.
"Isiseko seLewis, esichasene ngokungafaniyo ne-electronegativity, kulindeleke ukuba simisele amandla okubopha kunye nokuzinzisa ujongano kunye nemida yeenkozo," izazinzulu zatsho, ziphawula ukuba iimolekyuli zingqineke zisebenza kakuhle ekudaleni umanyano olomeleleyo phakathi kweeseli zeeseli. inqanaba lojongano."I-athomu yesiseko se-Lewis eneeathom ezimbini ezinikezela nge-electron inokubophelela kunye nokunxibelelana kwebhulorho kunye nemida yomhlaba, inika amandla okuphucula ukunamathela kunye nokomeleza ukuqina koomatshini beeseli zelanga ze-perovskite."
Izazinzulu zasebenzisa i-diphosphine Lewis base molecule eyaziwa ngokuba yi-1,3-bis(diphenylphosphino) propane (DPPP) ukuze idlule enye yezona zinto zithembisayo ze-halide perovskites-i-formamidinium lead iodide eyaziwa ngokuba yi-FAPbI3-ukuze isetyenziswe kwi-absorber layer yeseli.
Bafake i-perovskite layer kwi-DPPP-doped hole transport layer (HTL) eyenziwe nge-nickel (II) oxide (NiOx).Baye baqaphela ukuba ezinye iamolekyu ze-DPPP ziphinde zachithwa kwaye zahlula kwi-interface ye-perovskite / i-NiOx kunye nemimandla yendawo ye-perovskite, kwaye i-crystallinity yefilimu ye-perovskite iphuculwe.Bathe eli nyathelo lomelezaoomatshiniUkuqina kwe-perovskite/NiOx interface.
Abaphandi bakha iseli kunye ne-substrate eyenziwe ngeglasi kunye ne-tin oxide (FTO), i-HTL esekelwe kwi-NiOx, umaleko wei-methyl-substituted carbazole(Me-4PACz) njengomgangatho wezothutho, i-perovskite layer, i-phenethylammonium iodide (PEAI), i-electron transport layer eyenziwe nge-buckminsterfullerene (C60), i-tin (IV) oxide (SnO2) i-buffer layer, kunye uqhagamshelwano lwentsimbi olwenziwe ngesilivere (Ag).
Iqela liqhathanise ukusebenza kwe-DPPP-doped iseli yelanga kunye nesixhobo sokubhekisela esingazange sihambe kunyango.Iseli ye-doped iphumelele ukuguqulwa kwamandla okusebenza kakuhle kwe-24.5%, i-voltage ye-open-circuit voltage ye-1.16 V kunye nokuzaliswa kwe-82%.Isixhobo esingagqitywanga sifikelele ekusebenzeni kakuhle kwe-22.6%, i-voltage evulekileyo yesekethe ye-1.11 V kunye nokuzaliswa kwe-79%.
"Ukuphuculwa kwezinto zokuzalisa kunye ne-open-circuit voltage kuqinisekisile ukunciphisa ubuninzi besiphako kwi-interface yangaphambili ye-NiOx / perovskite emva konyango lwe-DPPP," kusho izazinzulu.
Abaphandi baye bakha iseli ye-doped kunye nendawo esebenzayo ye-1.05 cm2 ephumelele ukuguqulwa kwamandla.ukusebenza kakuhle ukuya kuthi ga kwi-23.9%kwaye akazange abonise ukuthotywa emva kwe-1,500 h.
"Nge-DPPP, phantsi kweemeko ze-ambient - oko kukuthi, akukho ukufudumeza okongeziweyo - ukuguqulwa kwamandla okusebenza ngokubanzi kweseli kwahlala phezulu malunga neeyure ze-3,500," kusho umphandi uChongwen Li."Iiseli zelanga ze-perovskite eziye zapapashwa ngaphambili kwiincwadi zivame ukubona ukuhla okukhulu ekusebenzeni kwazo emva kwe-1,500 kwiiyure ze-2,000, ngoko oku kuphuculo olukhulu."
Iqela, elisandula ukufaka isicelo selungelo elilodwa lomenzi wechiza kubuchule be-DPPP, libonise itekhnoloji yeseli “kuyilo oluqiqileyo lweemolekyuli ze-Lewisiiseli zelanga ze-perovskite ezizinzile kwaye ezisebenzayo,” esandul’ ukupapashwa kwiSayensi.Eli qela liquka izifundiswa zeDyunivesithi yaseToronto eKhanada, kwakunye nezazinzulu zeYunivesithi yaseToledo, iYunivesithi yaseWashington, neYunivesithi yaseNorthwestern eUnited States.
Ixesha lokuposa: Feb-27-2023