Otu ndị ọkà mmụta sayensị US-Canadia ejirila Lewis base molecule kwalite ngafe elu na cell perovskite anyanwụ.Ndị otu ahụ mepụtara ngwaọrụ nwere nnukwu voltaji mepere emepe yana ọkwa kwụsie ike dị ịrịba ama.
Otu ndị nyocha US-Canada ewepụtala perovskite tụgharịrịanyanwụ cellsite na iji Lewis base molecules maka ngafe elu.A na-ejikarị ntọala Lewis mee ihe na nyocha anyanwụ nke perovskite iji mee ka ntụpọ elu dị na oyi akwa perovskite.Nke a nwere mmetụta dị mma na nhazi ọkwa ike, kinetics recombination interface, omume hysteresis, na nkwụsi ike ọrụ.
"Lewis basicity, nke dị n'ụzọ dị iche na electronegativity, na-atụ anya ikpebi ike njikọ na nkwụsi ike nke interfaces na oke ọka," ndị ọkà mmụta sayensị kwuru, na-achọpụta na ụmụ irighiri ihe ndị ahụ gosipụtara na ha na-arụ ọrụ nke ọma n'ịmepụta njikọ siri ike n'etiti ọkwa cell na. ọkwa interface."Mkpụrụ ndụ Lewis nke nwere atom abụọ na-enye onyinye elektrọn nwere ike ijikọ ma jikọta oghere na oke ala, na-enye ikike ịkwalite adhesion na iwusi ike ike nke mkpụrụ ndụ anyanwụ perovskite."
Ndị ọkà mmụta sayensị jiri diphosphine Lewis molecule nke a maara dị ka 1,3-bis (diphenylphosphino) propane (DPPP) mee ka otu n'ime ihe ndị kasị ewu ewu halide perovskites - formidinium lead iodide mara dị ka FAPbI3 - maka ojiji na a cell absorber oyi akwa.
Ha debere perovskite oyi akwa na DPPP-doped oghere njem oyi akwa (HTL) mere nke nickel (II) oxide (NiOx).Ha chọpụtara na ụfọdụ ụmụ irighiri ihe DPPP gbazere ma kewapụ ya na mpaghara perovskite/NiOx na mpaghara elu perovskite, yana na kristal nke ihe nkiri perovskite ka mma.Ha kwuru na nzọụkwụ a kwalitere nke ahụn'ibuike nke perovskite/NiOx interface.
Ndị ọrụ nyocha ahụ jiri mkpụrụ nke iko na tin oxide (FTO) rụọ cell ahụ, HTL dabere na NiOx, oyi akwa.carbazole dochie methyl(Me-4PACz) dị ka oghere-ebufe oyi akwa, perovskite oyi akwa, a mkpa oyi akwa nke phenethylammonium iodide (PEAI), ihe eletrọn ebu oyi akwa nke buckminsterfullerene (C60), a tin (IV) oxide (SnO2) mkpuchi oyi akwa, na kọntaktị metal e ji ọlaọcha mee (Ag).
Ndị otu ahụ tụnyere arụmọrụ nke DPPP-doped solar cell na ngwaọrụ ntụaka nke na-agaghị na ọgwụgwọ ahụ.Mkpụrụ ndụ doped ahụ nwetara nrụpụta ike ngbanwe nke 24.5%, voltaji mepere emepe nke 1.16 V na ihe njuju nke 82%.Ngwaọrụ emechiri emechi ruru arụmọrụ nke 22.6%, voltaji mepere emepe nke 1.11 V yana ihe njuju nke 79%.
"Mmalite na njupụta ihe na-emepe emepe na voltaji na-emeghe kwadoro mbelata njupụta ntụpọ na NiOx / perovskite n'ihu interface mgbe ọgwụgwọ DPPP gasịrị," ndị ọkà mmụta sayensị kwuru.
Ndị nchọpụta ahụ wukwara cell doped nwere mpaghara na-arụ ọrụ nke 1.05 cm2 nke nwetara ntụgharị ikearụmọrụ ruru 23.9%ma egosighi mmebi ọ bụla mgbe awa 1,500 gasịrị.
"Site na DPPP, n'okpuru ọnọdụ gburugburu - ya bụ, enweghị ọkụ ọzọ - ngbanwe ike ngbanwe nke cell dị elu maka ihe dịka awa 3,500," onye nchọpụta Chongwen Li kwuru."Mkpụrụ ndụ anyanwụ nke perovskite nke e bipụtara na mbụ na akwụkwọ na-emekarị ka ọ dị ntakịrị na arụmọrụ ha mgbe awa 1,500 ruo 2,000 gasịrị, ya mere nke a bụ nnukwu ọganihu."
Otu a, nke tinyere akwụkwọ n'oge na-adịbeghị anya maka patent maka usoro DPPP, gosipụtara teknụzụ cell na "Rational design of Lewis base molecules formkpụrụ ndụ anwụ nke perovskite kwụsiri ike ma rụọ ọrụ nke ọma,” bụ́ nke e bipụtara na nso nso a na Sayensị.Otu a gụnyere ndị gụrụ akwụkwọ na Mahadum Toronto dị na Canada, yana ndị ọkà mmụta sayensị sitere na Mahadum Toledo, Mahadum Washington, na Mahadum Northwwest dị na United States.
Oge nzipu: Feb-27-2023