Sehlopha sa bo-ramahlale ba US-Canada se sebelisitse limolek'hule tsa Lewis ho ntlafatsa phallo ea holim'a seleng ea letsatsi ea perovskite.Sehlopha se hlahisitse sesebelisoa se nang le matla a phahameng a motlakase a bulehileng le maemo a tsitsitseng a tsotehang.
Sehlopha sa bafuputsi ba US-Canada se thehile perovskite e sothehilengmatla a letsatsika ho sebelisa limolek'hule tsa Lewis bakeng sa ho feta holim'a metsi.Li-bases tsa Lewis hangata li sebelisoa lipatlisisong tsa letsatsi la perovskite ho fetisa bofokoli bo holim'a lera la perovskite.Sena se na le litlamorao tse ntle mabapi le ho tsamaisana le maemo a matla, kinetics ea ho kopanya sefahleho, boits'oaro ba hysteresis, le botsitso ba ts'ebetso.
Bo-rasaense ba re: "Motheo oa Lewis, o sa lumellaneng le electronegativity, o lebeletsoe ho tseba matla a tlamang le ho tsitsisa ha li-interfaces le meeli ea lijo-thollo," ho boletse bo-rasaense, ba hlokomela hore limolek'hule li ipakile li sebetsa hantle haholo ho theheng maqhama a matla pakeng tsa likarolo tsa lisele. boemo ba sehokelo."Molek'hule oa motheo oa Lewis o nang le liathomo tse peli tse fanang ka elektronike e ka khona ho tlama le ho koala li-interfaces le meeli ea fatše, e fanang ka monyetla oa ho matlafatsa ho khomarela le ho matlafatsa matla a mochine oa lisele tsa letsatsi tsa perovskite."
Bo-rasaense ba sebelisitse diphosphine Lewis base molecule e tsejoang e le 1,3-bis(diphenylphosphino) propane (DPPP) ho fetisa e 'ngoe ea li-halide perovskites tse tšepisang - formamidinium lead iodide e tsejoang ka FAPbI3 - bakeng sa tšebeliso ea lera le monyang sele.
Ba kentse lesela la perovskite holim'a DPPP-doped hole transport layer (HTL) e entsoeng ka nickel (II) oxide (NiOx).Ba ile ba hlokomela hore limolek'hule tse ling tsa DPPP li ile tsa qhibiliha hape 'me tsa aroloa ka bobeli sebopeho sa perovskite / NiOx le libaka tsa perovskite holim'a libaka, le hore crystallinity ea filimi ea perovskite e ntlafetse.Ba boletse hore mohato ona o ntlafatsamochineho tiea ha sebopeho sa perovskite/NiOx.
Bafuputsi ba hahile sele ka substrate e entsoeng ka khalase le tin oxide (FTO), HTL e thehiloeng ho NiOx, lera lamethyl-substituted carbazole(Me-4PACz) e le lera la lipalangoang, perovskite layer, lesela le tšesaane la phenethylammonium iodide (PEAI), lesela la lipalangoang la elektronike le entsoeng ka buckminsterfullerene (C60), tin (IV) oxide (SnO2) buffer layer, le tšepe e entsoeng ka silevera (Ag).
Sehlopha se ile sa bapisa ts'ebetso ea DPPP-doped solar cell le sesebelisoa sa litšupiso se sa kang sa feta kalafo.Sele ea doped e fihletse katleho ea ho fetola matla ea 24.5%, motlakase o bulehileng oa 1.16 V le karolo ea 82%.Sesebelisoa se sa koaloang se fihlile katlehong ea 22.6%, motlakase o bulehileng oa 1.11 V le karolo ea 79%.
"Ho ntlafatsoa ha lintho tse tlatsitsoeng le motlakase o bulehileng oa potoloho ho netefalitse phokotso ea sekhahla sa sekoli ho NiOx / perovskite sehokelo se ka pele kamora kalafo ea DPPP," bo-rasaense ba boletse.
Bafuputsi ba ile ba boela ba haha sele ea doped e nang le sebaka se sebetsang sa 1.05 cm2 se fihletseng phetoho ea matla.ho sebetsa hantle ho fihla ho 23.9%'me ha ea ka ea bontša ho senyeha ka mor'a 1,500 h.
"Ka DPPP, tlas'a maemo a tikoloho - ke hore, ha ho na ho futhumatsa ho eketsehileng - ka kakaretso matla a ho fetola matla a sele a ile a lula a le holimo ka lihora tse ka bang 3,500," ho boletse mofuputsi Chongwen Li."Lisele tsa letsatsi tsa perovskite tse hatisitsoeng pele libukeng li atisa ho bona ho theoha ho hoholo ha katleho ea tsona ka mor'a lihora tsa 1,500 ho isa ho 2,000, kahoo ena ke ntlafatso e kholo."
Sehlopha, se sa tsoa etsa kopo ea tokelo ea molao bakeng sa mokhoa oa DPPP, se hlahisitse theknoloji ea sele ho "Rational design of Lewis base molecules for.lisele tse matla tsa letsatsi tsa perovskite tse tsitsitseng le tse sebetsang hantle,” e sa tsoa hatisoa ho Science.Sehlopha sena se kenyelletsa barutehi ba Univesithi ea Toronto e Canada, hammoho le bo-rasaense ba Univesithi ea Toledo, Univesithi ea Washington le Univesithi ea Northwestern United States.
Nako ea poso: Feb-27-2023