Ib pab pawg neeg Asmeskas-Canadian cov kws tshawb fawb tau siv Lewis puag molecules los txhim kho qhov chaw passivation hauv perovskite hnub ci cell.Pab neeg no tau tsim ib lub cuab yeej uas muaj qhov qhib-circuit voltage thiab zoo kawg nkaus stability.
Pab pawg tshawb fawb Asmeskas-Canadian tau tsim ib qho kev hloov pauv ntawm perovskitehnub ci celllos ntawm kev siv Lewis puag molecules rau nto passivation.Lewis bases feem ntau yog siv nyob rau hauv perovskite kev tshawb fawb hnub ci kom passivate defects ntawm lub perovskite txheej.Qhov no muaj cov txiaj ntsig zoo ntawm kev sib tw ntawm lub zog, kev sib txuas ntawm cov kinetics, hysteresis tus cwj pwm, thiab kev ua haujlwm ruaj khov.
"Lewis lub hauv paus, uas yog qhov sib txawv ntawm qhov sib piv rau electronegativity, yuav tsum txiav txim siab lub zog khi thiab ruaj khov ntawm kev sib tshuam thiab cov ciam teb," cov kws tshawb fawb tau hais tias, sau tseg tias cov molecules tau ua pov thawj tias muaj txiaj ntsig zoo hauv kev tsim kev sib raug zoo ntawm cov txheej txheem ntawm tes. theem interface."Lub Lewis lub hauv paus molecule nrog ob lub electron-dawb atoms tuaj yeem muaj peev xwm khi thiab txuas txuas txuas ntxiv thiab thaj tsam hauv av, muab lub peev xwm los txhim kho cov adhesion thiab ntxiv dag zog rau cov neeg kho tshuab toughness ntawm perovskite hnub ci hlwb."
Cov kws tshawb fawb tau siv diphosphine Lewis puag molecule hu ua 1,3-bis (diphenylphosphino) propane (DPPP) kom passivate ib qho ntawm cov pheej hmoo tshaj plaws halide perovskites - cov formamidinium lead iodide hu ua FAPbI3 - rau siv nyob rau hauv lub cell lub absorber txheej.
Lawv tso cov txheej perovskite rau ntawm DPPP-doped qhov thauj txheej (HTL) ua los ntawm nickel (II) oxide (NiOx).Lawv tau pom tias qee qhov DPPP molecules redissolved thiab cais ntawm ob qho tib si perovskite / NiOx interface thiab perovskite nto thaj tsam, thiab tias crystallinity ntawm perovskite zaj duab xis tau txhim kho.Lawv hais tias cov kauj ruam no txhim kho lubtxhua yamtoughness ntawm perovskite / NiOx interface.
Cov kws tshawb fawb tau tsim lub cell nrog lub substrate ua los ntawm iav thiab tin oxide (FTO), HTL raws li NiOx, ib txheej ntawmmethyl-substituted carbazole(Me-4PACz) raws li lub qhov-txheej txheej, txheej perovskite, txheej nyias ntawm phenethylammonium iodide (PEAI), ib txheej thauj electron ua los ntawm buckminsterfullerene (C60), tin (IV) oxide (SnO2) tsis txheej, thiab ib tug hlau hu ua nyiaj (Ag).
Pab pawg tau muab piv rau qhov kev ua tau zoo ntawm DPPP-doped hnub ci cell nrog cov khoom siv siv uas tsis dhau los ntawm kev kho mob.Lub doped cell ua tiav lub zog hloov dua siab tshiab ntawm 24.5%, qhov qhib-circuit voltage ntawm 1.16 V thiab ib qho tseem ceeb ntawm 82%.Cov cuab yeej tsis siv tau mus txog qhov ua tau zoo ntawm 22.6%, qhov qhib qhov hluav taws xob ntawm 1.11 V thiab qhov ua tiav ntawm 79%.
"Kev txhim kho ntawm qhov ua tau zoo thiab qhov hluav taws xob qhib hluav taws xob tau lees paub qhov txo qis ntawm qhov tsis xws luag ntawm NiOx / perovskite pem hauv ntej interface tom qab DPPP kho," cov kws tshawb fawb tau hais.
Cov kws tshawb fawb kuj tau tsim cov doped cell nrog thaj tsam ntawm 1.05 cm2 uas ua tiav lub zog hloov pauv.efficiency txog li 23.9%thiab pom tsis muaj degradation tom qab 1,500 teev.
"Nrog DPPP, nyob rau hauv ib puag ncig puag ncig - uas yog, tsis muaj cua sov ntxiv - tag nrho lub zog hloov pauv ntawm lub xov tooj ntawm tes tau nyob siab li ntawm 3,500 teev," tus kws tshawb fawb Chongwen Li tau hais."Lub perovskite hnub ci hlwb uas tau luam tawm yav dhau los hauv cov ntaub ntawv zoo li pom qhov poob qis hauv lawv cov txiaj ntsig tom qab 1,500 txog 2,000 teev, yog li qhov no yog qhov kev txhim kho loj."
Cov pab pawg, uas tsis ntev los no tau thov rau patent rau DPPP cov txheej txheem, nthuav tawm lub xov tooj ntawm tes hauv "Rational design of Lewis base molecules forruaj khov thiab ua tau zoo inverted perovskite solar cells," uas nyuam qhuav luam tawm hauv Science.Pab neeg no suav nrog kev kawm los ntawm University of Toronto hauv Canada, nrog rau cov kws tshawb fawb los ntawm University of Toledo, University of Washington, thiab Northwestern University hauv Tebchaws Meskas.
Post lub sij hawm: Feb-27-2023