Raws li kev tshaj xov xwm txawv teb chaws, University of California, Santa Barbara (UCSB) tshaj tawm tias nws tau ua thawj zaug InGaN-based liab micro LED chips nrog loj me dua 10 microns, thiab ntsuas ntawm wafers. Kev tawm mus rau qhov ntau ntawm qhov ntau npaum li cas (EQE) yog 0.2%.
Txhim kho cov kev ua kom zoo dua qub quantum sab nraud tseem tshuav ntev ntev
Yav dhau los, Fabkis cov khoom siv hluav taws xob cov tshuab hluav taws xob Soitec, uas muaj peev xwm ua kom ntau-tsim InGaN-based liab Micro LED chips, tso tawm 50-micron InGaN-based liab Micro LED khoom hauv xyoo 2020. Txawm li cas los xij, Shubhra Pasayat, tus tshaj tawm rau UCSB pab pawg, taw qhia tias Soitec Tsis muaj ntaub ntawv ntawm sab nraud quantum efficiency tau raug tso tawm.
Pasayat tau hais tias Micro LEDs me dua 10 microns yog qhov tseem ceeb rau kev ua lag luam tsim kev lag luam ntawm Micro LED kev lag luam. Nyob rau tib lub sijhawm, ntxiv rau qhov loj me me, sab nraud quantum efficiency ntawm Micro LED nti yuav tsum yog tsawg kawg 2-5% kom tau raws li cov kev xav tau ntawm Micro LED cov zaub.
Txawm li cas los xij, kev ua hauj lwm sab nrauv qhov tseeb ntawm InGaN-based liab Micro LED nti ua los ntawm UCSB lub sijhawm no tsuas yog 0.2%. Hauv qhov no, Pasayat tau hais qhia ncaj qha hais tias txawm hais tias cov kev tshawb fawb tam sim no ntawm pab pawg tsis tau ncav cuag lub hom phiaj, cov haujlwm tshawb fawb cuam tshuam tau nkag mus rau theem pib thiab qhov kev vam meej tuaj yeem xav tau yav tom ntej.
Lub hom phiaj tom ntej ntawm pab pawg UCSB yog txhawm rau txhim kho kev muaj txiaj ntsig sab nrauv ntawm cov teeb liab liab Micro LED nti. Nws tam sim no npaj los txhim kho cov khoom kom zoo thiab txhim kho cov txheej txheem ntau lawm.
InGaN daim ntawv thov cov khoom siv kev cia siab tuaj yeem xav tau
Nws kuj tseem tsim nyog sau cia tias UCSB pab pawg tau kawm InGaN-based liab Micro LEDs hloov AlGaInP-based liab Micro LEDs, mas vim tias qhov ua tau zoo ntawm tom kawg feem ntau poob qis raws li qhov loj me. Pasayat qhia tias, txog tam sim no, qhov tsawg kawg nkaus ntawm AlGaInP-based liab Micro LED chips yog 20 microns, thiab sab nraud quantum efficiency tsis paub.
Nws to taub tias cov LED liab tam sim no feem ntau yog ua los ntawm AlGaInP cov ntaub ntawv, thiab lawv cov khoom siv tau ntau npaum li 60% lossis ntau dua nyob rau hauv lub cev nti. Txawm li cas los xij, thaum lub nti loj yog txo rau qhov kev txiav txim ntawm micrometers, qhov ua haujlwm yuav poob qis dua 1%.
Tsis tas li ntawd, nyob rau hauv huab hwm coj hloov txheej txheem, cov khoom tsis zoo ntawm AlGaInP cov ntaub ntawv kuj pom tseeb.
Kev hloov pauv loj yuav tsum muaj cov khoom kom muaj lub zog zoo siv kom tsis txhob tawg thaum lub nti nti thiab kev tso, thaum cov khoom tsis zoo ntawm AlGaInP cov khoom yuav ntxiv teeb meem tshiab rau huab hwm coj mus hloov.
Hauv kev sib piv, InGaN zaj duab xis muaj qhov zoo xws li kho tau qhov dav dav dav dav, thiab muaj cov ntawv thov dav dav hauv cov chaw pom pom, thiab Micro LED cov xim puv xim yog qhov ua tau zoo tshaj plaws.
Nws tau tshaj tawm tias InGaN cov khoom muaj zoo dua qub kev ruaj ntseg thiab qhov luv qhov tsis txaus qhov ntev, thiab tau sib xws nrog InGaN-based ntsuab thiab xiav Micro LEDs, yog li nws yog qhov kev xaiv zoo dua rau liab Micro LEDs.
Nws yog tsim nyog sau cia tias pab pawg ntawm Tus Kawm Txuj Ci Jiang Fengyi tshaj tawm ib qho kev tshawb fawb txog qhov ua tau zoo hauv InGaN-based txiv kab ntxwv-liab LEDs xyoo tas los. Cov ntaub ntawv tshawb fawb tseem ua pov thawj tias InGaN cov ntaub ntawv yuav muaj ntau lub peev xwm hauv kev tsim cov liab-lub teeb liab pixel chips rau zaub siv.
Ntxiv rau, UCSB thiab Seoul Viosys tau ua qhov kev tshawb fawb txog kev hloov ntawm cov txiaj ntsig sab nraud ntawm qhov ntsuas hluav taws xob sab nraud ntawm Micro LEDs uas me dua 5 microns. Raws li cov ntaub ntawv tshawb fawb, lawv ntseeg hais tias InGaN-based liab micro LEDs yuav tsum pab tsim cov lag luam me me kom muaj xim me me thiab xim micro LED pom.
Nyob rau tib lub sijhawm, ob tog cia siab tias yuav txhawb nqa kev siv me dua InGaN-based Micro LEDs hauv high-end cov teb xws li cov xov tooj ntse, AR tsom iav thiab 4K TV los ntawm cov ntsiab lus xws li txhim kho qhov ci thiab kev cia siab.