Koox saynisyahano ah oo US-Canadian ah ayaa adeegsadey molecules saldhigga Lewis si ay u wanaajiyaan socodka dusha sare ee unugga qorraxda ee perovskite.Kooxdu waxay soo saartay qalab leh koronto furan oo sarreeya iyo heerar xasilloon oo cajiib ah.
Koox cilmi baaris ah oo Mareykan-Canadian ah ayaa sameeyay perovskite roganunugga cadceeddaadigoo isticmaalaya unugyada saldhiga Lewis ee socodka hawada sare.Saldhigyada Lewis waxaa guud ahaan loo adeegsadaa cilmi-baarista qorraxda ee perovskite si loo dhaafo cilladaha dusha sare ee lakabka perovskite.Tani waxay saameyn togan ku leedahay toosinta heerka tamarta, kinetics-ka dib-u-habaynta wejiga, habdhaqanka hysteresis, iyo xasiloonida hawlgalka.
Saynis yahanadu waxay yiraahdeen "Aasaaska Lewis, oo si ka duwan u dhiganta electronegativity, ayaa la filayaa in ay go'aamiso tamarta isku xiran iyo xasilinta is-dhexgalka iyo xuduudaha hadhuudhka," saynisyahannadu waxay yiraahdeen, iyagoo xusay in molecules-ku ay caddeeyeen in ay si aad ah ugu hufan yihiin abuurista isku xirnaanta adag ee u dhexeeya lakabyada unugyada heerka interface."Molecule saldhigga Lewis oo leh laba atom oo ku-deeqaha elektarooniga ah ayaa suurtagal ah inay isku xiraan oo isku xiraan isku-xirnaanta iyo xuduudaha dhulka, iyagoo siinaya awoodda kor loogu qaadayo adhesionka iyo xoojinta qallafsanaanta farsamada ee unugyada qoraxda perovskite."
Saynis yahanadu waxay isticmaaleen molecule-ka diphosphine Lewis ee loo yaqaan 1,3-bis(diphenylphosphino) propane (DPPP) si ay u dhaafaan mid ka mid ah haldoorka halide perovskites-ka foramidinium lead iodide ee loo yaqaan FAPbI3 - si loogu isticmaalo lakabka nuugista unugga.
Waxay ku shubeen lakabka perovskite lakabka gaadiidka dalool ee DPPP-doped (HTL) oo ka samaysan nikkel (II) oxide (NiOx).Waxay arkeen in qaar ka mid ah molecules DPPP ay dib u milmaan oo kala sooceen labadaba perovskite / NiOx interface iyo gobollada dusha sare ee perovskite, iyo in crystallinity ee filimka perovskite uu soo fiicnaaday.Waxay sheegeen in tallaabadani ay sare u qaadaysomakaanikadkaanta perovskite/NiOx interface.
Cilmi-baadhayaashu waxay ku dhiseen unugga substrate ka samaysan galaas iyo tin oxide (FTO), HTL oo ku salaysan NiOx, lakabkamethyl-ku beddelka carbazole(Me-4PACz) sida lakabka-qaadista daloolka, lakabka perovskite, lakabka khafiifka ah ee phenethylammonium iodide (PEAI), lakabka gaadiidka elektaroonigga ah ee ka samaysan buckminsterfullerene (C60), tin (IV) oxide (SnO2) lakabka kaydinta, iyo xiriir bir ah oo ka samaysan qalin (Ag).
Kooxdu waxay barbardhigtay waxqabadka unugga cadceedda ee DPPP-doped iyo aalad tixraaceed oo aan soo marin daawaynta.Unugga doped-ku wuxuu gaadhay waxtarka beddelka awoodda 24.5%, korantada wareegga furan ee 1.16 V iyo qodob buuxinaya 82%.Qalabka aan la xidhin waxa uu gaadhay waxtarka 22.6%, danab furan oo wareeg ah oo ah 1.11 V iyo qodob buuxinaya 79%.
"Horumarinta qodobka buuxinta iyo korantada wareegga furan ayaa xaqiijisay hoos u dhaca cufnaanta cilladda ee NiOx / perovskite interface ka dib daaweynta DPPP," saynisyahannadu waxay yiraahdeen.
Cilmi-baadhayaashu waxay sidoo kale dhiseen unug doped leh oo leh aag firfircoon oo 1.05 cm2 ah kaas oo ku guuleystay beddelka awooddawax ku oolnimada ilaa 23.9%mana muujin wax hoos u dhac ah kadib 1,500 saac.
"DPPP, xaaladaha deegaanka - taas oo ah, ma jiro kuleyl dheeraad ah - waxtarka beddelka awoodda guud ee unuggu wuxuu joogey heer sare qiyaastii 3,500 saacadood," ayuu yiri cilmi-baare Chongwen Li.Unugyada qorraxda ee perovskite ee hore loogu daabacay suugaanta waxay u muuqdaan inay arkaan hoos u dhac weyn oo ku yimaada waxtarkooda ka dib saacadaha 1,500 ilaa 2,000, markaa tani waa horumar weyn."
Kooxda, oo dhawaan codsatay rukhsad farsamo DPPP, waxay soo bandhigtay tignoolajiyada unugyada "Naqshadaynta macquulka ah ee unugyada saldhigga Lewisunugyada qoraxda perovskite rogan oo deggan oo hufan,” oo dhawaan lagu daabacay Science.Kooxda waxaa ku jira aqoonyahanno ka socda Jaamacadda Toronto ee Kanada, iyo sidoo kale saynisyahano ka socda Jaamacadda Toledo, Jaamacadda Washington, iyo Jaamacadda Waqooyi-galbeed ee Mareykanka.
Waqtiga boostada: Febraayo-27-2023