Ua hoʻohana kekahi pūʻulu ʻepekema US-Kanada i nā molekala kumu Lewis e hoʻomaikaʻi i ka passivation o ka ʻili i loko o kahi cell solar perovskite.Ua hoʻokumu ka hui i kahi mea hana me ka volta kaapuni hāmama kiʻekiʻe a me nā pae kūpaʻa kupaianaha.
Ua hana kahi hui noiʻi US-Kanada i kahi perovskite invertedcell cellme ka hoʻohana ʻana i nā molekala kumu Lewis no ka passivation ʻili.Hoʻohana maʻamau ʻia nā kumu Lewis i ka noiʻi solar perovskite e hoʻopau i nā hemahema o ka ʻili i ka papa perovskite.He hopena maikaʻi kēia i ka alignment pae ikehu, interfacial recombination kinetics, hysteresis behavior, a me ka paʻa o ka hana.
"ʻO Lewis basicity, ka mea i hoʻohālikelike ʻia i ka electronegativity, e manaʻo ʻia e hoʻoholo i ka ikehu hoʻopaʻa a me ka hoʻopaʻa ʻana o nā pilina a me nā palena o ka palaoa," i ʻōlelo ai nā ʻepekema, me ka ʻike ʻana i nā molekala i hōʻoia i ka hana maikaʻi loa i ka hoʻokumu ʻana i ka paʻa paʻa ma waena o nā papa cell ma ka pae kikohoʻe."ʻO kahi mole mole kumu Lewis me ʻelua mau mea hāʻawi electron hiki ke hoʻopaʻa a hoʻopaʻa i nā pilina a me nā palena ʻāina, e hāʻawi ana i ka hiki ke hoʻonui i ka adhesion a hoʻoikaika i ka paʻakikī mechanical o nā cell solar perovskite."
Ua hoʻohana ka poʻe ʻepekema i kahi moleke kumu diphosphine Lewis i kapa ʻia ʻo 1,3-bis(diphenylphosphino) propane (DPPP) e hoʻololi i kekahi o nā halide perovskites maikaʻi loa - ka formamidinium lead iodide i ʻike ʻia ʻo FAPbI3 - no ka hoʻohana ʻana i ka papa hoʻoheheʻe o ke kelepona.
Ua waiho lākou i ka papa perovskite ma luna o kahi DPPP-doped hole transport layer (HTL) i hana ʻia me ka nickel(II) oxide (NiOx).Ua ʻike lākou ua hoʻoheheʻe hou ʻia kekahi mau molekala DPPP a hoʻokaʻawale ʻia ma ke kikowaena perovskite/NiOx a me nā ʻāpana ʻili perovskite, a ua hoʻomaikaʻi ʻia ka crystallinity o ke kiʻi perovskite.Ua ʻōlelo lākou ua hoʻonui kēia hana i kamechanicalpaʻakikī o ka pilina perovskite/NiOx.
Ua kūkulu nā mea noiʻi i ke kelepona me kahi substrate i hana ʻia me ke aniani a me ka tin oxide (FTO), ka HTL i hoʻokumu ʻia ma NiOx, kahi papa omethyl-substituted carbazole(Me-4PACz) e like me ka hole-transport layer, ka perovskite layer, kahi ʻāpana lahilahi o ka phenethylammonium iodide (PEAI), kahi papa lawe electron i hana ʻia me ka buckminsterfullerene (C60), kahi pahu pahu (IV) oxide (SnO2), a me he mea pili metala i hana ʻia me ke kālā (Ag).
Ua hoʻohālikelike ka hui i ka hana o ka DPPP-doped solar cell me kahi mea kuhikuhi i hele ʻole i ka mālama ʻana.Ua loaʻa i ka cell doped kahi mana hoʻololi hoʻololi o 24.5%, kahi hāmama kaapuni o 1.16 V a me kahi helu hoʻopiha o 82%.Ua hōʻea ka hāmeʻa undoped i ka pono o 22.6%, kahi volta kaapuni open-circuit o 1.11 V a me kahi mea hoʻopiha piha o 79%.
"ʻO ka hoʻomaikaʻi ʻana i ka mea hoʻopiha a me ka volta kaapuni hāmama i hōʻoia i ka emi ʻana o ka defect density ma ka NiOx / perovskite front interface ma hope o ka mālama ʻana i ka DPPP," wahi a nā ʻepekema.
Ua kūkulu pū nā mea noiʻi i kahi cell doped me kahi wahi ikaika o 1.05 cm2 i loaʻa i kahi hoʻololi manahiki i ka 23.9%a ʻaʻole i hōʻike i ka degradation ma hope o 1,500 h.
"Me DPPP, ma lalo o nā kūlana ambient - ʻo ia hoʻi, ʻaʻohe mea hoʻomehana hou - ua noho kiʻekiʻe ka mana holoʻokoʻa o ka hoʻololi ʻana o ke kelepona no kahi o 3,500 mau hola," wahi a ka mea noiʻi ʻo Chongwen Li."ʻO nā cell solar perovskite i paʻi mua ʻia ma ka palapala e ʻike i kahi hāʻule nui o kā lākou hana ma hope o 1,500 a 2,000 mau hola, no laila he hoʻomaikaʻi nui kēia."
ʻO ka hui, ka mea i noi hou aku nei no kahi patent no ka ʻenehana DPPP, ua hōʻike i ka ʻenehana kelepona i ka "Rational design of Lewis base molecules for.paʻa a me ka pono inverted perovskite solar cell,” i paʻi ʻia ma ka Science.Aia i loko o ka hui nā mea hoʻonaʻauao mai ke Kulanui o Toronto ma Kanada, a me nā ʻepekema mai ke Kulanui o Toledo, ke Kulanui o Wakinekona, a me ke Kulanui o Northwestern ma United States.
Ka manawa hoʻouna: Feb-27-2023