Nekuvandudzwa kwekuratidzira kwe LED, matekinoroji akawanda uye mashandisirwo ekuratidzira kwe LED akawanikwa.
Pano ndinoda kutaura mamwe matekinoroji matsva eChiratidziro che LED.Isu tinogona kudzidza maitiro ekuratidzwa kwe LED kubva kune aya matekinoroji matsva.Izvi zvichatibatsira kuita zvisarudzo zviri nani.
Kubudirira kukuru kwakaitwa mumunda wekutsvagisa kweOLED
Musi wa14 Gumiguru, Nature Photonics yakaburitsa online zvakangoitwa nechikwata chaProfessor Yang Chuluo weShenzhen University mumunda weOLED tsvagiridzo.
Thermally Activated Delayed Fluorescence (TADF) zvinhu zvave hotspot yekutsvagisa mune organic light-emitting diode (OLED) light-emitting zvinhu mumakore gumi apfuura nekuda kwekugona kwavo kuwana theoretical 100% yemukati quantum kunyatsoshanda.Mumakore achangopfuura, akawanda resonance thermally activated yakanonoka fluorescence (MR-TADF) zvinhu zvine hukuru hwekushandisa mumhando yepamusoro-tsanangudzo yekuratidzira nekuda kweakatetepa-bhendi ekuburitsa maitiro.
Nekudaro, iyo reverse intersystem kusvetuka chiyero (kRISC) yeakawanda resonance TADF zvinhu zvinowanzononoka, zvichikonzera kudzikisira kwakapinza kwehunyanzvi hwemagetsi anoburitsa chiedza pakupenya kwakanyanya, izvo zvinoita kuti zviome kune inoenderana OLED zvishandiso kuti zvive nehunyanzvi hwepamusoro. uye kuchena kwemavara epamusoro.uye yakaderera roll-off.Kuti vagadzirise dambudziko rakakosha rekudzika-kudzika, timu yaProfessor Yang Chuluo weShenzhen University yakagadzira BNSeSe nekuisa isiri-simbi inorema atomu selenium element muyakawanda resonance framework, uye yakashandisa inorema atomu mhedzisiro kusimudzira kubatana. pakati peiyo imwechete uye katatu (S1 uye T1) orbitals yezvinhu., zvichikonzera zvakanyanya kRISC (2.0 ×106 s-1) uye photoluminescence quantum kunyatsoshanda (100%).
Iyo yekunze quantum kunyatsoshanda kwemhute-yakaiswa OLED mudziyo wakagadzirirwa nekushandisa BNSeSe sechinhu chevaenzi chemwenje-emitting layer chakakwira kusvika 36.8%, uye kugona kwayo roll-off kunodzvanywa.Iyo yekunze quantum inoshanda ichiri yakakwira se21.9% pam-² kupenya, inofananidzwa ne phosphorescent zvinhu zvakaita se iridium neplatinamu.Pamusoro pezvo, kekutanga, vakagadzira superfluorescent OLED zvishandiso vachishandisa akawanda resonance-mhando TADF zvinhu sesensitizer.Transparent LED zvishandiso.Chishandiso chine hupamhi hwekunze hwehuwandu hwe40.5% uye yekunze quantum kunyatsoita kwe32.4% pa1000 cd m-² kupenya.Kunyangwe pa10,000 cd m-² kupenya, iyo yekunze quantum inoshanda ichiri yakakwira se23.3%, kugona kwesimba kwakanyanya kunodarika 200 lm W-1, uye kupenya kwakanyanya kuri pedyo ne200,000 cd m-².
Iri basa rinopa zano idzva uye nzira inoshanda yekugadzirisa dhizaini roll-off dambudziko reMR-TADF electroluminescent zvishandiso, zvine tarisiro huru yekushandisa mune yakakwirira-tsanangudzo kuratidza.Mhedzisiro yakabatana yakaburitswa mupepanhau rine mukurumbira pasi rose Nature Photonics pasi pezita rekuti "Inoshanda selenium-yakabatanidzwa TADF OLEDs ine yakaderedzwa roll-off" ("Nature Photonics", impact factor 39.728, JCR District 1 yeChinese Academy of Sciences, chinzvimbo. kutanga mumunda we optics).
USTC yakaita kufambira mberi kwakakosha mumunda we perovskite LED uye chiedza-emitting device tsvakurudzo
Zvishandiso zvePerovskite zvine tarisiro yakakosha yekushandisa muminda yemasero ezuva, maLED, uye mafotodetectors nekuda kweakanakisa optoelectronic zvimiro.Iyo firimu yekugadzira mhando uye microstructure yemafirimu eperovskite anoita basa rakakosha mukuita kwemidziyo yeoptoelectronic.Iyo nanostructure yakaumbwa pamusoro pe perovskite inowedzera kupararira kwemafotoni pamusoro peiyo firimu yakaonda, ichiwana budiriro mumuganho wekubudirira we perovskite LED zvishandiso.Mhedzisiro yakabatana yakaburitswa muZvishandiso Zvepamberi pasi pemusoro wekuti "Kukunda Iyo Outcoupling Limit yePerovskite Chiedza-emitting Diodes ine Artificially Formed Nanostructures".
Perovskite LEDs dzine zvakanakira tunable emission wavelength, yakamanikana emission hafu-peak hupamhi, uye nyore kugadzirira.Kushanda kwechigadzirwa cheperovskite LEDs parizvino kunonyanya kuderedzwa nechiedza chekubvisa mwenje.Naizvozvo, kuwedzera mwenje wekutora mwenje wekushandisa inzira yakakosha yekutsvagisa.Inorganic LEDs uye quantum dot LEDs, mamwe mavara ekuwedzera emwenje anowanzo kudiwa kuti awedzere kutorwa kwephoton, sekushandiswa kwefly-eye lens arrays, biomimetic moth-eye nanostructures, uye yakaderera-refractive-index coupling layers.Nekudaro, idzi nzira dzinoita kuti dhizaini yekugadzira dhizaini ive yakaoma uye inowedzera mutengo wekugadzira.
Boka rekutsvagisa raXiao Zhengguo rakashuma nzira inogona kungoerekana yagadzira chimiro chakavezwa pamusoro peperovskite matete mafirimu,uye kunatsiridza kutorwa kwechiedzakunyatsoshanda kwe perovskite
Ma LED nekuwedzera iyo photon inopararira pamusoro peiyo firimu yakaonda.Munguva yekugadzirira kwefirimu, nekudzora nguva yekugara ye-anti-solvent pamusoro pefirimu, iyo crystallization process ye perovskite inogona kudzorwa, zvichiita kuti pave nekugadzirwa kwepamusoro.Kune mafirimu ane avhareji ukobvu hwe1.5 μm, kushata kwepamusoro kunogona kuramba kudzorwa kubva pa15.3 nm kusvika 241 nm, uye mhute inowedzerwawo kubva pa6% kusvika inopfuura 90%.
Kubatsirwa nekuwedzera kwekupararira kwephoton pamusoro pefirimu pamusoro, chiedza chekubudisa chiedza che perovskite LEDs ane zvinyorwa zvinyorwa zvakawedzera kubva pa11.7% kusvika ku26.5% ye planar perovskite LEDs, uye kushandiswa kwechigadzirwa chinoenderana.perovskite LEDsyakawedzerawo kubva pa10%.% yakawedzera zvakanyanya kusvika ku20.5%.Basa riri pamusoro apa rinopa nzira itsva yekugadzira chiedza-chinobudisa nanostructures ye perovskite optoelectronic devices.Iyo perovskite firimu ine micro-nano chimiro chakafanana neiyo textured morphology mu crystalline silicon solar masero, iyo inotarisirwa kuvandudza mwenje wekupinza kushanda uye kushanda kweperovskite solar masero.
Nguva yekutumira: Nov-07-2022