Ka nts'etsopele ea ponts'o ea LED, theknoloji e ntseng e eketseha le ts'ebeliso ea ponts'o ea LED li fumanoe.
Mona ke batla ho bua ka mahlale a macha aPontšo ea LED.Re ka ithuta mekhoa ea ponts'o ea LED ho tsoa mahlaleng ana a macha.Sena se tla re thusa ho etsa liqeto tse molemo.
Khatelo-pele e kholo e entsoe lefapheng la lipatlisiso tsa OLED tse sa bonahaleng
Ka la 14 Mphalane, Nature Photonics e phatlalalitse marang-rang lintho tsa morao-rao tse fihletsoeng ke sehlopha sa Moprofesa Yang Chuluo oa Univesithi ea Shenzhen lebaleng la lipatlisiso tsa OLED.
Thermally Activated Delayed Fluorescence (TADF) thepa e se e le sebaka sa lipatlisiso ho lisebelisoa tse ntšang mabone a organic light-emitting diode (OLED) lilemong tse leshome tse fetileng ka lebaka la bokhoni ba tsona ba ho fihlela katleho ea 100% ea ka hare ea quantum.Lilemong tsa morao tjena, lisebelisoa tsa "multiple resonance thermally activated delayed fluorescence" (MR-TADF) li na le monyetla o moholo oa ts'ebeliso lits'ebetsong tse nang le litlhaloso tse phahameng ka lebaka la litšobotsi tsa tsona tse moqotetsane.
Leha ho le joalo, reverse intersystem jumping rate (kRISC) ea multiple resonance TADF materials hangata e lieha, e bakang phokotso e matla ea bokhoni ba lisebelisoa tse ntšang khanya ka khanya e phahameng, e leng se etsang hore ho be thata hore lisebelisoa tse tsamaellanang tsa OLED li sebetse hantle ka bobeli. le bohloeki ba mebala e phahameng.le phalliso e tlase.E le ho rarolla bothata ba bohlokoa ba ho theola tšebetso e nepahetseng, sehlopha sa Moprofesa Yang Chuluo oa Univesithi ea Shenzhen se ile sa kopanya BNSeSe ka ho kenya elemente ea selenium e se nang tšepe ka har'a moralo oa resonance e ngata, 'me sa sebelisa phello e boima ea athomo ho matlafatsa khokahano. pakeng tsa li-orbitals tse le 'ngoe le tse tharo (S1 le T1) tsa thepa., e hlahisang kRISC e phahameng haholo (2.0 ×106 s-1) le katleho ea photoluminescence quantum (100%).
Bokhoni ba kantle ba sesebelisoa sa OLED se kentsoeng ke mouoane bo lokisitsoeng ka ho sebelisa BNSeSe joalo ka ha thepa ea baeti ea lesela le ntšang mabone e phahame joalo ka 36.8%, 'me ts'ebetso ea eona ea ho koala e hatelloa ka nepo.Ts'ebetso ea kantle ea quantum e ntse e phahame joalo ka 21.9% ho khanya ea m-², e ka bapisoang le lisebelisoa tsa phosphorescent tse kang iridium le platinum.Ho feta moo, ka lekhetlo la pele, ba ile ba etsa lisebelisoa tsa OLED tsa superfluorescent ba sebelisa lisebelisoa tse ngata tsa TADF tsa mofuta oa resonance e le sensitizers.Lisebelisoa tsa LED tse hlakileng.Sesebelisoa se na le bokhoni bo phahameng ba kantle ba 40.5% le katleho ea kantle ea 32.4% ho khanya ea 1000 cd m-².Le ka khanya ea 10,000 cd m-², katleho ea bokantle e ntse e le holimo ho 23.3%, matla a phahameng a matla a feta 200 lm W-1, 'me khanya e phahameng e haufi le 200,000 cd m-².
Mosebetsi ona o fana ka maikutlo a macha le mokhoa o sebetsang oa ho rarolla bothata ba ho qalisa hantle ha lisebelisoa tsa motlakase tsa MR-TADF, tse nang le litebello tse ntle tsa ts'ebeliso ka pontšo e phahameng ea tlhaloso.Liphetho tse amanang li ile tsa hatisoa koranteng e tsebahalang ea machaba ea Nature Photonics tlas'a sehlooho sa "Efficient selenium-integrated TADF OLEDs with the reduce roll-off" ("Nature Photonics", impact factor 39.728, JCR District 1 ea Chinese Academy of Sciences, boemong ba ea pele tšimong ea optics).
USTC e entse tsoelo-pele ea bohlokoa tšimong ea perovskite LED le lipatlisiso tsa lisebelisoa tse hlahisang leseli
Lisebelisoa tsa Perovskite li na le menyetla ea bohlokoa ea ts'ebeliso masimong a lisele tsa letsatsi, li-LED, le li-photodetectors ka lebaka la thepa ea bona e ntle ea optoelectronic.Boleng ba sebopeho sa filimi le microstructure ea lifilimi tsa perovskite li bapala karolo ea bohlokoa ts'ebetsong ea lisebelisoa tsa optoelectronic.Nanostructure e entsoeng holim'a perovskite e eketsa ho hasana ha photon holim'a filimi e tšesaane, ho finyella katleho ea moeli oa katleho ea lisebelisoa tsa LED tsa perovskite.Liphello tse amanang le tsona li ile tsa hatisoa ho Advanced Materials tlas'a sehlooho se reng "Ho Hlōla Moeli o Hlakollang oa Perovskite Light-emitting Diode le Nanostructures e entsoeng ka Maiketsetso".
Li-LED tsa Perovskite li na le melemo ea bophahamo ba maqhubu a motlakase a ka khonehang, bophara ba halofo ea tlhōrō ea tlhahiso, le ho itokisa habonolo.Ts'ebetso ea lisebelisoa tsa li-LED tsa perovskite hajoale e lekanyelitsoe haholo-holo ke bokhoni ba ho ntša leseli.Ka hona, ho eketsa bokhoni ba ho ntša leseli la sesebelisoa ke tataiso ea bohlokoa haholo ea lipatlisiso.Holi-LED tsa tlhaho le li-LED tsa matheba a quantum, ka kakaretso ho hlokahala likarolo tse eketsehileng tsa ho ntša khanya ho eketsa ho ntšoa ha photon, tse kang tšebeliso ea li-lens tsa fly-eye, li-biomimetic moth-eye nanostructures, le likarolo tse kopanyang tse tlaase-refractive-index.Leha ho le joalo, mekhoa ena e etsa hore mokhoa oa ho etsa lisebelisoa o be thata le ho eketsa litšenyehelo tsa tlhahiso.
Sehlopha sa lipatlisiso sa Xiao Zhengguo se tlalehile mokhoa o ka iketsetsang sebopeho se entsoeng ka holim'a lifilimi tse tšesaane tsa perovskite,le ho ntlafatsa khanya ea leselikatleho ea perovskite
Li-LED ka ho eketsa ho hasana ha photon holim'a filimi e tšesaane.Nakong ea ho lokisoa ha filimi, ka ho laola nako ea bolulo ea anti-solvent holim'a filimi, mokhoa oa crystallization oa perovskite o ka laoloa, o hlahisang sebaka se entsoeng ka holimo.Bakeng sa lifilimi tse nang le botenya ba 1.5 μm, botenya ba bokaholimo bo ka laoloa khafetsa ho tloha ho 15.3 nm ho isa ho 241 nm, 'me moholi o eketseha ho tloha ho 6% ho isa ho 90%.
Ho rua molemo ho tsoa ho keketseho ea ho hasana ha photon holim'a filimi, bokhoni ba ho ntša leseli la li-LED tsa perovskite tse nang le mekhoa e metle bo eketsehile ho tloha ho 11.7% ho ea ho 26.5% ea li-LED tsa planar perovskite, le katleho e lumellanang ea lisebelisoali-LED tsa perovskitehape e eketsehile ho tloha ho 10%.% e eketsehile haholo ho fihla ho 20.5%.Mosebetsi o ka holimo o fana ka mokhoa o mocha oa ho etsa li-nanostructures tse ntšang leseli bakeng sa lisebelisoa tsa perovskite optoelectronic.Filimi ea perovskite e nang le sebopeho sa micro-nano e tšoana le morphology e entsoeng ka crystalline silicon lisele tsa letsatsi, tse lebeletsoeng ho ntlafatsa bokhoni ba ho monya leseli le ts'ebetso ea lisele tsa letsatsi tsa perovskite.
Nako ea poso: Nov-07-2022