Ngokuthuthukiswa kwesibonisi se-LED, kutholakale ubuchwepheshe obuningi kanye nokusetshenziswa kwesibonisi se-LED.
Lapha ngifuna ukukhuluma ngobuchwepheshe obushaIsibonisi se-LED.Singafunda amathrendi wesibonisi se-LED kulobu buchwepheshe obusha.Lokhu kuzosisiza senze izinqumo ezingcono.
Impumelelo enkulu yenziwe emkhakheni wocwaningo lwe-OLED olune-spectrum encane
Ngomhla ziyi-14 kuMfumfu, i-Nature Photonics yashicilela ku-inthanethi izimpumelelo zakamuva zethimba likaSolwazi u-Yang Chuluo wase-Shenzhen University emkhakheni wocwaningo lwe-OLED.
Izinto zokwakha ze-Thermally Activated Delayed Fluorescence (TADF) seziphenduke isizinda socwaningo ezintweni ezikhiqiza ukukhanya kwe-organic light-emitting diode (OLED) kule minyaka eyishumi edlule ngenxa yekhono lazo lokuzuza umcabango osebenza kahle we-quantum ongu-100%.Eminyakeni yakamuva, izinto ezisetshenziswayo ze-resonance thermally activated delayed fluorescence (MR-TADF) zinamandla amakhulu okusebenza kuzibonisi ezinencazelo ephezulu ngenxa yezimpawu zazo zokukhishwa kwebhande elincane.
Kodwa-ke, i-reverse intersystem jumping rate (kRISC) yezinto ezisetshenziswayo ze-TADF ezinomsindo omningi ngokuvamile ihamba kancane, okuholela ekuncipheni okubukhali kokusebenza kahle kwamadivayisi akhipha ukukhanya ekukhanyeni okuphezulu, okwenza kube nzima ngamadivayisi ahambisanayo e-OLED ukuthi abe nakho kokubili ukusebenza kahle okuphezulu. nokuhlanzeka kombala okuphezulu.kanye ne-roll-off ephansi.Ukuze kuxazululwe inkinga eyinhloko yokuqalisa ukusebenza kahle, ithimba likaSolwazi u-Yang Chuluo wase-Shenzhen University lahlanganisa i-BNSeSe ngokushumeka isici se-athomu esindayo esingeyona insimbi ohlakeni lokukhala okuningi, futhi lasebenzisa umphumela osindayo we-athomu ukuze kuthuthukiswe ukuhlangana. phakathi kwe-orbital eyodwa kanye ne-triplet (S1 kanye ne-T1) yezinto ezibonakalayo., okuholela ku-kRISC ephezulu kakhulu (2.0 ×106 s-1) kanye nokusebenza kahle kwe-photoluminescence quantum (100%).
Ukusebenza kwe-quantum yangaphandle kwedivayisi ye-OLED efakwe umhwamuko elungiswe kusetshenziswa i-BNSeSe njengoba impahla yesivakashi yesendlalelo esikhipha ukukhanya iphezulu ngendlela engu-36.8%, futhi ukukhishwa kwayo okusebenzayo kucindezelwa ngempumelelo.Ukusebenza kahle kwe-quantum yangaphandle kusephezulu njengokungu-21.9% ekukhanyeni kwe-m², okuqhathaniseka nezinto ze-phosphorescent ezifana ne-iridium neplatinamu.Ngaphezu kwalokho, ngokokuqala ngqa, bakha amadivaysi e-OLED e-superfluorescent besebenzisa izinto eziningi ze-TADF zohlobo lwe-resonance njengezinzwa.Amadivayisi e-LED abonakalayo.Idivayisi inokusebenza kahle okuphezulu kwe-quantum yangaphandle okungu-40.5% kanye nokusebenza kahle kwe-quantum yangaphandle okungu-32.4% ekukhanyeni okungu-1000 cd m-².Ngisho nasekukhanyeni okungu-10,000 cd m-², ukusebenza kahle kwe-quantum yangaphandle kusephezulu njengo-23.3%, ukusebenza kahle okukhulu kwamandla kudlula u-200 lm W-1, futhi ukukhanya okuphezulu kusondele ku-200,000 cd m-².
Lo msebenzi uhlinzeka ngombono omusha kanye nendlela ephumelelayo yokuxazulula inkinga ye-roll-off esebenza kahle yemishini kagesi ye-MR-TADF, enamathemba amahle ohlelo lokusebenza ekubonisweni kwencazelo ephezulu.Imiphumela ehlobene yanyatheliswa kujenali eyaziwa emhlabeni wonke ye-Nature Photonics ngaphansi kwesihloko esithi "Ama-TADF OLED ahlanganiswe ne-selenium esebenza kahle ane-roll-off encishisiwe" ("Izithombe Zemvelo", isici somthelela esingu-39.728, i-JCR District 1 ye-Chinese Academy of Sciences, izinga okokuqala emkhakheni we-optics).
I-USTC yenze inqubekelaphambili ebalulekile emkhakheni we-perovskite LED kanye nocwaningo lwedivayisi ekhipha ukukhanya
Izinto ze-Perovskite zinamathemba okusebenza abalulekile emikhakheni yamaseli elanga, ama-LED, nama-photodetectors ngenxa yezakhiwo zabo ezinhle kakhulu ze-optoelectronic.Ikhwalithi yokwakhiwa kwefilimu kanye ne-microstructure yamafilimu e-perovskite idlala indima ebalulekile ekusebenzeni kwamadivayisi we-optoelectronic.I-nanostructure eyenziwe ebusweni be-perovskite ikhulisa ukusakazeka kwama-photons ebusweni befilimu encane, ithola impumelelo emkhawulweni wokusebenza kahle kwamadivayisi we-perovskite LED.Imiphumela ehlobene yanyatheliswa ku-Advanced Materials ngaphansi kwesihloko esithi "Ukunqoba Umkhawulo Ophumayo We-Perovskite Light-emitting Diodes nge-Artificially Formed Nanostructures".
Ama-LED e-Perovskite anezinzuzo ze-wavelength ekhishwayo eshintshwayo, ukukhishwa okuncane kobubanzi bokuphakama kwesigamu, kanye nokulungiselela okulula.Ukusebenza kahle kwedivayisi kwama-LED e-perovskite okwamanje kukhawulelwe ngokuyinhloko ukusebenza kahle kokukhipha ukukhanya.Ngakho-ke, ukwandisa ukusebenza kahle kokukhipha ukukhanya kwedivayisi kuyisiqondiso esibaluleke kakhulu socwaningo.Kuama-LED aphilayo nama-LED amachashazi e-quantum, izingqimba ezengeziwe zokukhishwa kokukhanya ngokuvamile ziyadingeka ukuze kwandiswe ukukhishwa kwe-photon, njengokusetshenziswa kwama-lens e-fly-eye, ama-biomimetic moth-eye nanostructures, kanye nezingqimba zokuhlanganisa ze-low-refractive-index.Kodwa-ke, lezi zindlela zenza inqubo yokwenziwa kwemishini ibe nzima kakhulu futhi zenyuse izindleko zokukhiqiza.
Iqembu locwaningo lika-Xiao Zhengguo libike indlela engenza ngokuzenzakalelayo ukwakheka okubhaliwe ebusweni bamafilimu amancanyana e-perovskite,futhi uthuthukise ukukhishwa kokukhanyaukusebenza kahle kwe-perovskite
Ama-LED ngokwandisa ukusakazeka kwe-photon ebusweni befilimu encane.Ngesikhathi sokulungiswa kwefilimu, ngokulawula isikhathi sokuhlala se-anti-solvent endaweni yefilimu, inqubo ye-crystallization ye-perovskite ingalawulwa, okuholela endaweni eqoshiwe.Kumafilimu anogqinsi oluyisilinganiso esingu-1.5 μm, ukungezwani kwendawo kungalawuleka ngokuqhubekayo ukusuka ku-15.3 nm kuya ku-241 nm, futhi inkungu iyanda ngokuhambisanayo isuka ku-6% iye ngaphezu kuka-90%.
Ukuzuza ekwandeni kokusakazeka kwe-photon endaweni yefilimu, ukusebenza kahle kokukhipha ukukhanya kwama-LED e-perovskite anezakhiwo ezithungwe kukhuphuke ukusuka ku-11.7% kuya ku-26.5% wama-LED e-planar perovskite, kanye nokusebenza kahle kwedivayisi okuhambisanayoperovskite LEDsiphinde yenyuka isuka ku-10%.% inyuke kakhulu yafinyelela ku-20.5%.Umsebenzi ongenhla unikeza indlela entsha yokwenza ama-nanostructures akhipha ukukhanya kumadivayisi e-perovskite optoelectronic.Ifilimu ye-perovskite enesakhiwo se-micro-nano ifana ne-textured morphology kumaseli elanga e-crystalline silicon, okulindeleke ukuthi ithuthukise ukusebenza kahle kokumuncwa kokukhanya nokusebenza kwamaseli elanga e-perovskite.
Isikhathi sokuthumela: Nov-07-2022