N'oge na-adịbeghị anya, ndị otu nyocha nke Prọfesọ Xiao Zhengguo sitere na Ụlọ Akwụkwọ nke Physics nke Mahadum Sayensị na Nkà na Ụzụ nke China, Key Laboratory of Strongly Coupled Quantum Material Physics nke Chinese Academy of Sciences na Hefei National Research Center maka Microscale Material Science mere ihe dị mkpa. agamnihu n'ọhịa nke ịkwadebe nke ọma na perovskite otu kristalIgwe ọkụ.

Ndị otu nyocha ahụ etoola otu kristal dị elu, nnukwu mpaghara na ultra-thin perovskite site na iji usoro mmachi oghere, ma kwadebere perovskite single crystal LED nwere nchapụta karịa 86000 cd / m2 na ndụ ruo 12500 h maka oge mbụ, nke mere nzọụkwụ dị mkpa kwupụta ngwa nke perovskite ikanam mmadụọkụ. Mmezu ndị dị mkpa, nke akpọrọ "Elu na-egbukepụ egbukepụ ma kwụsie ike otu-crystal perovskite light-emitting diodes", ka ebipụtara na Nature Photonics na February 27.

Metal halide perovskite abụrụla ọgbọ ọhụrụ nke ihe ngosi LED na ihe ọkụ n'ihi ogologo ogologo ogologo ya, obere obosara ọkara elu na nkwadebe dị ala. Ugbu a, mpụga quantum arụmọrụ (EQE) nke perovskite LED (PeLED) dabere na polycrystalline thin film karịrị 20%, tụnyere azụmahịa organic LED (OLED). N'ime afọ ndị na-adịbeghị anya, ọrụ ndụ nke ọtụtụ ndị kọrọ elu-arụmọrụ perovskiteNgwaọrụ LEDsitere na narị otu narị ruo puku kwuru puku awa, ka na-ada azụ OLED. A ga-emetụta nkwụsi ike nke ngwaọrụ ahụ site na ihe ndị dị ka mmegharị ion, ntinye ihe na-ebu ibu na-enweghị isi na okpomọkụ joule na-emepụta n'oge ọrụ. Na mgbakwunye, nnukwu Auger recombination na polycrystalline perovskite ngwaọrụ na-amachikwa nchapụta nke ngwaọrụ.

Na nzaghachi nye nsogbu ndị a dị n'elu, ndị ọrụ nyocha Xiao Zhengguo jiri usoro mmachi oghere na-eto perovskite otu kristal na mkpụrụ dị na ọnọdụ. Site n'ịgbanwe ọnọdụ uto, iwebata amines organic na polymers, a na-emeziwanye ogo kristal nke ọma, si otú a na-akwadebe nnukwu kristal MA0.8FA0.2PbBr3 dị elu nke nwere obere kristal nke 1.5 μm. Ọdịiche dị n'elu bụ ihe na-erughị 0.6 nm, na mkpụrụ nke ime fluorescence quantum (PLQYINT) ruru 90%. The perovskite otu kristal LED ngwaọrụ kwadebere na mkpa otu kristal dị ka ìhè emitting oyi akwa nwere EQE nke 11.2%, a nchapụta karịa 86000 cd/m2, na ndụ nke 12500 h. Ọ na mbụ ruru n'ọnụ ụzọ nke azụmahịa, na aghọwo otu n'ime ndị kasị ike perovskite ikanam ngwaọrụ ugbu a.

Ọrụ dị n'elu na-egosi n'ụzọ zuru ezu na iji perovskite dị obere kristal dị ka ìhè na-egbukepụ egbukepụ bụ ihe ngwọta dị mma maka nsogbu nkwụsi ike, na perovskite otu kristal LED nwere atụmanya dị ukwuu n'ọhịa nke ọkụ mmadụ na ngosi.