Ƙungiyar masana kimiyya ta Amurka-Kanada ta yi amfani da kwayoyin tushe na Lewis don inganta haɓakar sararin samaniya a cikin ƙwayar rana ta perovskite.Ƙungiyar ta samar da na'ura mai babban ƙarfin lantarki mai buɗewa da matakan kwanciyar hankali na ban mamaki.
Wata ƙungiyar binciken Amurka-Kanada ta ƙirƙira wani juzu'i na perovskitehasken ranata hanyar amfani da kwayoyin tushe na Lewis don wucewar ƙasa.Ana amfani da sansanonin Lewis gabaɗaya a binciken binciken hasken rana don ƙetare lahani a cikin Layer perovskite.Wannan yana da ingantattun tasiri akan daidaita matakin makamashi, yanayin sake hadewar fuska, halayyar hysteresis, da kwanciyar hankali na aiki.
"Lewis tushe, wanda yake da inversely gwargwado ga electronegativity, ana sa ran ya ƙayyade dauri makamashi da kuma tabbatar da musaya da hatsi iyakoki," da masana kimiyya sun ce, lura da cewa kwayoyin sun tabbatar da cewa suna da inganci sosai wajen samar da karfi bond tsakanin cell yadudduka a. matakin dubawa."Kwayoyin tushe na Lewis tare da nau'ikan zarra guda biyu masu ba da gudummawar lantarki na iya yuwuwar haɗawa da gada da iyakokin ƙasa, suna ba da yuwuwar haɓaka mannewa da ƙarfafa taurin inji na ƙwayoyin hasken rana perovskite."
Masanan kimiyya sun yi amfani da diphosphine Lewis tushe kwayoyin da aka sani da 1,3-bis(diphenylphosphino) propane (DPPP) don wuce ɗaya daga cikin mafi kyawun halide perovskites - foramidinium gubar iodide da aka sani da FAPbI3 - don amfani a cikin Layer's absorber Layer.
Sun ajiye perovskite Layer a kan DPPP-doped rami transport Layer (HTL) da aka yi da nickel (II) oxide (NiOx).Sun lura cewa wasu kwayoyin DPPP sun sake narkar da su kuma sun rabu da su a cikin perovskite / NiOx interface da yankunan perovskite, kuma cewa crystallinity na fim din perovskite ya inganta.Sun ce wannan matakin ya ingantainjiTauri na perovskite/NiOx dubawa.
Masu binciken sun gina tantanin halitta tare da wani abin da aka yi da gilashi da tin oxide (FTO), HTL bisa NiOx, wani Layer namethyl-musanya carbazole(Me-4PACz) a matsayin ramin-transport Layer, da perovskite Layer, wani bakin ciki Layer na phenethylammonium iodide (PEAI), wani lantarki sufuri Layer na buckminsterfullerene (C60), wani tin (IV) oxide (SnO2) buffer Layer, da kuma tuntuɓar ƙarfe da aka yi da azurfa (Ag).
Tawagar ta kwatanta aikin DPPP-doped solar cell tare da na'urar tunani wanda bai bi ta hanyar jiyya ba.Tantanin da aka yi amfani da shi ya sami ingantaccen juzu'in juzu'i na 24.5%, wutar lantarki mai buɗewa na 1.16 V da ma'aunin cikawa na 82%.Na'urar da ba a kwance ba ta kai inganci na 22.6%, ƙarfin lantarki mai buɗewa na 1.11 V da ma'aunin cikawa na 79%.
"Haɓaka akan abubuwan cikawa da wutar lantarki mai buɗewa ya tabbatar da raguwar ƙarancin lahani a gaban gaban NiOx / perovskite bayan jiyya na DPPP," in ji masanan.
Har ila yau, masu binciken sun gina tantanin halitta mai kara kuzari tare da yanki mai aiki na 1.05 cm2 wanda ya sami canjin wutar lantarkiinganci har zuwa 23.9%kuma bai nuna raguwa ba bayan 1,500 h.
"Tare da DPPP, a karkashin yanayi na yanayi - wato, babu ƙarin dumama - ƙarfin jujjuyawar gaba ɗaya na tantanin halitta ya kasance mai girma na kimanin sa'o'i 3,500," in ji mai bincike Chongwen Li."Kwayoyin hasken rana na perovskite waɗanda aka buga a baya a cikin wallafe-wallafen suna nuna raguwa sosai a cikin ingancin su bayan sa'o'i 1,500 zuwa 2,000, don haka wannan babban ci gaba ne."
Ƙungiya, wadda kwanan nan ta nemi takardar izini don fasahar DPPP, ta gabatar da fasahar tantanin halitta a cikin "Rational design of Lewis base molecules forbarga da ingantaccen inverted perovskite hasken rana Kwayoyin,” wanda kwanan nan aka buga a Kimiyya.Tawagar ta hada da malamai daga Jami'ar Toronto da ke Kanada, da kuma masana kimiyya daga Jami'ar Toledo, Jami'ar Washington, da Jami'ar Arewa maso Yamma a Amurka.
Lokacin aikawa: Fabrairu-27-2023