Site na mmepe nke ihe ngosi LED, achọpụtala ọtụtụ teknụzụ na ngwa nke ngosipụta LED.
Ebe a ka m chọrọ ikwu ụfọdụ ọhụrụ teknụzụ nkeNgosipụta LED.Anyị nwere ike ịmụta usoro ihe ngosi LED site na teknụzụ ọhụrụ ndị a.Nke a ga-enyere anyị aka ime mkpebi ka mma.
Emeela nnukwu ọganihu n'ọhịa nyocha OLED dị warara
Na October 14, Nature Photonics bipụtara online ọhụrụ rụzuru nke otu Prọfesọ Yang Chuluo nke Shenzhen University na ubi nke OLED nnyocha.
Ihe na-eme ka ọkụ na-egbu oge (TADF) aghọọla ebe nyocha na ihe ndị na-enye ọkụ na-enwu ọkụ n'ime afọ iri gara aga n'ihi ikike ha iji nweta arụmọrụ 100% dị n'ime.N'ime afọ ndị na-adịbeghị anya, ọtụtụ ihe resonance thermally activated-egbu oge fluorescence (MR-TADF) nwere ike ngwa dị ukwuu na ngosipụta nkọwa dị elu n'ihi njirimara mgbapụta ha dị warara.
Otú ọ dị, reverse intersystem jumping rate (kRISC) nke multiple resonance TADF ihe na-adịkarị nwayọọ, na-eme ka attenuation dị nkọ nke arụmọrụ nke ngwaọrụ na-enye ọkụ na nchapụta dị elu, nke na-eme ka o sie ike maka ngwaọrụ OLED kwekọrọ na ha ga-arụ ọrụ dị elu. na akwa agba ọcha.na obere mpịakọta.Iji dozie isi nsogbu nke mwepu nke arụmọrụ, ndị otu Prọfesọ Yang Chuluo nke Mahadum Shenzhen rụpụtara BNSeSe site na itinye ihe na-abụghị ọla atom selenium element n'ime ọtụtụ resonance framework, ma jiri atom mmetụta dị arọ mee ka njikọ ahụ dịkwuo elu. n'etiti otu na triplet (S1 na T1) orbitals nke ihe., na-ebute kRISC dị oke elu (2.0 ×106 s-1) na photoluminescence quantum arụmọrụ (100%).
Ikike mpụta nke akụrụngwa OLED nke vapor akwadoro site na iji BNSeSe dị ka ihe ndị ọbịa nke oyi akwa na-enye ọkụ dị elu dị ka 36.8%, na-ebelata arụmọrụ ya nke ọma.Ịrụ ọrụ nke mpụta dị elu ka dị 21.9% na m-² nchapụta, nke atụnyere ihe phosphorescent dị ka iridium na platinum.Na mgbakwunye, na nke mbụ, ha mepụtara ngwaọrụ OLED superfluorescent site na iji ọtụtụ ụdị TADF resonance dị ka ihe mmetụta.Ngwaọrụ LED transperent.Ngwaọrụ nwere oke arụmọrụ nke mpụta nke 40.5% yana arụmọrụ nke mpụta nke 32.4% na 1000 cd m-² nchapụta.Ọbụlagodi na 10,000 cd m-² nchapụta, arụmọrụ mpụta nke mpụga ka dị elu dị ka 23.3%, arụmọrụ ike kachasị karịa 200 lm W-1, na nchapụta kachasị dị nso na 200,000 cd m-².
Ọrụ a na-enye echiche ọhụrụ na ụzọ dị irè iji dozie nsogbu mpụta nke ọma nke ngwaọrụ electroluminescent MR-TADF, nke nwere atụmanya ngwa dị ukwuu na ngosipụta dị elu.E bipụtara nsonaazụ ndị metụtara ya na akwụkwọ akụkọ ụwa ama ama Nature Photonics n'okpuru aha nke "Efficient selenium-integrated TADF OLEDs with small roll-off" ("Nature Photonics", mmetụta mmetụta 39.728, JCR District 1 nke Chinese Academy of Sciences, ogo. mbụ na ngalaba nke optics).
USTC enweela ọganihu dị mkpa n'ọhịa nke perovskite LED na nyocha ngwaọrụ na-enye ọkụ
Ihe Perovskite nwere atụmanya ngwa dị mkpa n'ọhịa nke mkpụrụ ndụ anyanwụ, LEDs, na fotodetectors n'ihi njirimara optoelectronic ha dị mma.Ogo mmepụta ihe nkiri na microstructure nke ihe nkiri perovskite na-arụ ọrụ dị mkpa na arụmọrụ nke ngwaọrụ optoelectronic.Nanostructure kpụrụ n'elu perovskite na-abawanye mgbasa nke photons n'elu ihe nkiri dị mkpa, na-enweta ọganihu na njedebe arụmọrụ nke ngwaọrụ LED perovskite.E bipụtara nsonaazụ ndị metụtara ya na ihe ndị dị elu n'okpuru aha "Imeri oke njedebe nke Perovskite Light-emitting Diodes with Artificially Formed Nanostructures".
Perovskite LEDs nwere uru dị n'ogologo ikuku ikuku na-emegharị emegharị, obosara nke ọkara kacha elu, yana nkwadebe dị mfe.A na-amachi arụmọrụ ngwaọrụ nke perovskite LED ugbu a site na arụmọrụ mmịpụta ọkụ.Ya mere, ịba ụba mmepụta ọkụ nke ngwaọrụ bụ ntụziaka nyocha dị oke mkpa.N'imeorganic LEDs na quantum dot LEDs, A na-achọkarị ọkwa mmịpụta ọkụ agbakwunyere iji mee ka mmịpụta foton dịkwuo elu, dị ka iji ngwa anya anya efe efe, nanostructures nla-anya biomimetic, na akwa njikọ njikọ dị ala-refractive-index.Otú ọ dị, ụzọ ndị a na-eme ka usoro nrụpụta ngwaọrụ dịkwuo mgbagwoju anya ma na-abawanye ọnụ ahịa mmepụta ihe.
Otu nyocha nke Xiao Zhengguo kọrọ usoro nke nwere ike ịmepụta usoro ederede n'elu ihe nkiri perovskite.ma melite mmịpụta ọkụarụmọrụ nke perovskite
LEDs site n'ịbawanye foton na-agbasa n'elu ihe nkiri dị mkpa.N'oge nkwadebe ihe nkiri ahụ, site n'ịchịkwa oge obibi nke mgbochi mgbaze n'elu ihe nkiri ahụ, a na-achịkwa usoro crystallization nke perovskite, na-eme ka ọ bụrụ ihe ederede.Maka ihe nkiri nwere nkezi ọkpụrụkpụ nke 1.5 μm, enwere ike ịchịkwa ịdị arọ nke elu ya site na 15.3 nm ruo 241 nm, na haze na-abawanye site na 6% ruo ihe karịrị 90%.
Na-erite uru site na mmụba nke mgbasa ozi foton n'elu ihe nkiri ahụ, arụmọrụ mmịpụta ọkụ nke perovskite LEDs nwere ihe ederede gbagoro site na 11.7% ruo 26.5% nke planar perovskite LEDs, yana ngwaọrụ dabara adaba nke ọma.LEDs perovskitegbagoro site na 10%.% mụbara nke ukwuu ruo 20.5%.Ọrụ dị n'elu na-enye usoro ọhụrụ iji mepụta nanostructures na-ewepụta ọkụ maka ngwaọrụ optoelectronic perovskite.Ihe nkiri nke perovskite nwere ihe owuwu micro-nano yiri nke a na-edobe na morphology dị na sel silicon nke kristal, nke a na-atụ anya na ọ ga-eme ka ọkụ ọkụ na-arụ ọrụ nke ọma na arụmọrụ nke perovskite solar cell.
Oge nzipu: Nov-07-2022