Gulu la asayansi aku US-Canada lagwiritsa ntchito mamolekyu a Lewis kuti apititse patsogolo kuyenda kwa cell ya solar ya perovskite.Gululi linapanga chipangizo chokhala ndi magetsi otseguka komanso osasunthika modabwitsa.
Gulu lofufuza la US-Canada lapanga perovskite invertedcell solarpogwiritsira ntchito ma molekyulu a Lewis kuti apitirire pamwamba.Maziko a Lewis amagwiritsidwa ntchito pofufuza za dzuwa la perovskite kuti athetse zolakwika zapamtunda wa perovskite wosanjikiza.Izi zimakhala ndi zotsatira zabwino pamalumikizidwe amphamvu, ma interfacial recombination kinetics, machitidwe a hysteresis, komanso kukhazikika kwa magwiridwe antchito.
"Lewis Basicity, yomwe ili yosiyana kwambiri ndi electronegativity, ikuyembekezeka kudziwa mphamvu zomangirira ndi kukhazikika kwa malo olumikizirana ndi malire a tirigu," asayansi atero, pozindikira kuti mamolekyuwa athandiza kwambiri popanga mgwirizano wamphamvu pakati pa zigawo za cell. mulingo wa mawonekedwe."Molekyu yoyambira ya Lewis yokhala ndi maatomu awiri opereka ma elekitironi imatha kumangirira ndikulumikizana ndi mlatho ndi malire apansi, ndikupereka mwayi wowonjezera kumamatira ndikulimbitsa kulimba kwama cell a solar a perovskite."
Asayansiwa adagwiritsa ntchito molekyulu ya diphosphine Lewis yomwe imadziwika kuti 1,3-bis(diphenylphosphino) propane (DPPP) kuti adutse imodzi mwazinthu zodalirika kwambiri za halide perovskites - formamidinium lead iodide yomwe imadziwika kuti FAPbI3 - kuti igwiritsidwe ntchito mu cell absorbent.
Anayika perovskite wosanjikiza pa DPPP-doped hole transport layer (HTL) yopangidwa ndi nickel(II) oxide (NiOx).Iwo adawona kuti mamolekyu ena a DPPP adasungunukanso ndikulekanitsidwa pa mawonekedwe a perovskite / NiOx ndi madera a perovskite pamwamba, komanso kuti crystallinity ya filimu ya perovskite inakula.Iwo adanena kuti izi zidawonjezeramakinakulimba kwa mawonekedwe a perovskite/NiOx.
Ofufuzawo adapanga selo ndi gawo lapansi lopangidwa ndi galasi ndi tin oxide (FTO), HTL yochokera ku NiOx, wosanjikiza wamethyl-substituted carbazole(Me-4PACz) monga dzenje-transport wosanjikiza, perovskite wosanjikiza, wosanjikiza woonda wa phenethylammonium iodide (PEAI), ndi electron transport wosanjikiza wopangidwa ndi buckminsterfullerene (C60), tin (IV) oxide (SnO2) wosanjikiza wosanjikiza, ndi kukhudzana kwachitsulo kopangidwa ndi siliva (Ag).
Gululo linayerekeza momwe ma cell a solar a DPPP-doped amagwirira ntchito ndi chipangizo chofotokozera chomwe sichinadutse chithandizocho.Selo la doped linapeza mphamvu yosinthira mphamvu ya 24.5%, magetsi otseguka a 1.16 V ndi kudzaza 82%.Chipangizo chosasunthika chinafika pakuchita bwino kwa 22.6%, magetsi otseguka a 1.11 V ndi kudzaza 79%.
"Kuwongolera kwa zinthu zodzaza ndi magetsi otseguka kunatsimikizira kuchepa kwa chilema pa mawonekedwe a NiOx / perovskite kutsogolo pambuyo pa chithandizo cha DPPP," adatero asayansi.
Ofufuzawo adapanganso cell ya doped yokhala ndi gawo logwira ntchito la 1.05 cm2 lomwe lidakwanitsa kusintha mphamvu.Kuchita bwino mpaka 23.9%ndipo sanawonetse kunyozeka pambuyo pa 1,500 h.
"Ndi DPPP, m'malo ozungulira - ndiko kuti, palibe kutentha kwina - mphamvu yonse yosinthira mphamvu ya seloyo idakhala yokwera kwa maola pafupifupi 3,500," adatero wofufuza Chongwen Li."Maselo a dzuwa a perovskite omwe adasindikizidwa kale m'mabuku amayamba kuona kuchepa kwakukulu kwa ntchito yawo pambuyo pa 1,500 mpaka maola a 2,000, kotero izi ndizosintha kwambiri."
Gululi, lomwe posachedwapa lidafunsira chiphaso chaukadaulo wa DPPP, lidapereka tekinoloje yama cell mu "Rational design of Lewis base molecules for.ma cell a solar a perovskite okhazikika komanso ogwira mtima,” lofalitsidwa posachedwapa m’magazini a Science.Gululi likuphatikizapo ophunzira a ku yunivesite ya Toronto ku Canada, komanso asayansi ochokera ku yunivesite ya Toledo, yunivesite ya Washington, ndi yunivesite ya Northwestern ku United States.
Nthawi yotumiza: Feb-27-2023