Raws li cov xov xwm tsis ntev los no los ntawm South Kauslim xov xwm, Korea Photonics Technology Institute (KOPTI) tau tshaj tawm txoj kev loj hlob zoo ntawm cov thev naus laus zis Micro LED zoo thiab zoo. Lub zog ua haujlwm sab hauv ntawm Micro LED tuaj yeem tswj tau hauv qhov ntau ntawm 90%, tsis hais qhov loj me ntawm lub nti lossis cov qhov sib txawv ntawm cov tshuaj txhaj tam sim no.

20μm Micro LED current-voltage curve thiab emission image (duab credit: KOPTI)

Cov thev naus laus zis Micro LED no tau tsim los ntawm Dr. Jong hyup Baek pab neeg los ntawm Optical Semiconductor Display Department, pab pawg ZOGAN Semi coj los ntawm Dr. Woong ryeol Ryu, thiab Xibfwb Jong hauv Shim los ntawm Department of Nano-Optoelectronics ntawm Hanyang University. Cov khoom no daws qhov teeb meem ntawm kev txo qis sai ntawm lub teeb ci hauv Micro LEDs vim yog qhov me me ntawm cov chip thiab cov hluav taws xob txhaj tshuaj ntau ntxiv.

Nws tau pom tias Micro LEDs hauv qab 20μm hauv qhov loj tsis yog tsuas yog muaj kev txo qis sai sai hauv kev ua haujlwm ntawm lub teeb xwb tab sis kuj qhia txog kev poob qis tseem ceeb uas tsis yog-radiative recombination hauv qhov ntau tam sim no qis (0.01A / cm² txog 1A / cm²) uas xav tau rau kev tsav tsheb cov vaj huam sib luag. Tam sim no, kev lag luam ib feem txo qhov teeb meem no los ntawm cov txheej txheem passivation ntawm sab ntawm lub nti, tab sis nws tsis daws qhov teeb meem tseem ceeb.

Qhov ua haujlwm quantum sab hauv (IQE) ntawm 20μm thiab 10μm xiav Micro LED sib txawv raws li qhov ceev tam sim no.

KOPTI piav qhia tias pab pawg tshawb fawb tau txo qhov kev ntxhov siab hauv txheej epitaxial thiab txhim kho qhov ua haujlwm ntawm lub teeb los ntawm kev siv cov qauv tshiab. Cov qauv tshiab no tswj hwm qhov kev hloov pauv ntawm lub cev ntawm Micro LED nyob rau hauv txhua lub zog hluav taws xob sab nraud lossis cov qauv. Yog li ntawd, txawm tias muaj qhov me me ntawm Micro LED, cov qauv tshiab txo qhov kev poob ntawm qhov chaw tsis yog hluav taws xob thaum tswj hwm qhov ua haujlwm ntawm lub teeb siab yam tsis tas yuav siv cov txheej txheem passivation.

Cov pab neeg tau ua tiav qhov kev lees paub txog kev siv cov thev naus laus zis Micro LED zoo thiab zoo hauv cov khoom siv xiav, gallium nitride ntsuab, thiab liab. Yav tom ntej, cov thev naus laus zis no muaj peev xwm tsim cov xim puv gallium nitride Micro LED zaub.