Malinga ndi malipoti aposachedwa ochokera ku atolankhani aku South Korea, bungwe la Korea Photonics Technology Institute (KOPTI) lalengeza kuti lapanga bwino ukadaulo wa Micro LED wothandiza komanso wabwino. Mphamvu yamkati ya Micro LED imatha kusungidwa mkati mwa 90%, mosasamala kanthu za kukula kwa chip kapena kuchuluka kwa mphamvu ya injection.

Chithunzi cha 20μm Micro LED current-voltage current ndi emission current (chithunzi cha: KOPTI)

Ukadaulo wa Micro LED uwu unapangidwa pamodzi ndi gulu la Dr. Jong Hyup Baek kuchokera ku Optical Semiconductor Display Department, gulu la ZOGAN Semi lotsogozedwa ndi Dr. Woong ryeol Ryu, ndi Pulofesa Jong in Shim kuchokera ku Dipatimenti ya Nano-Optoelectronics ku Hanyang University. Chogulitsachi chikukambirana za vuto la kuchepa kwachangu kwa mphamvu yotulutsa kuwala mu ma Micro LED chifukwa cha kuchepa kwa kukula kwa ma chip ndi kuwonjezeka kwa ma injection currents.

Zapezeka kuti ma Micro LED osakwana 20μm kukula kwawo sikuti amangochepetsa mphamvu ya kuwala kokha komanso amawonetsa kutayika kwakukulu kwa recombination komwe sikungagwere mkati mwa mphamvu yochepa yamagetsi (0.01A/cm² mpaka 1A/cm²) yofunikira poyendetsa ma display panels. Pakadali pano, makampaniwa amachepetsa vutoli pang'ono kudzera mu njira zosinthira magetsi kumbali ya chip, koma kwenikweni sizimathetsa vutoli.

Mphamvu yamkati ya quantum (IQE) ya 20μm ndi 10μm blue Micro LED imasiyana malinga ndi kuchuluka kwa magetsi komwe kulipo.

KOPTI ikufotokoza kuti gulu lofufuza lachepetsa kupsinjika kwa epitaxial layer ndikukweza mphamvu yotulutsa kuwala poyambitsa kapangidwe katsopano. Kapangidwe katsopano kameneka kamaletsa kusinthasintha kwa mphamvu ya Micro LED pansi pa gawo lililonse lamagetsi lakunja kapena kapangidwe kake. Zotsatira zake, ngakhale ndi kukula kochepa kwa Micro LED, kapangidwe katsopano kamachepetsa kwambiri kutayika kwa recombination pamwamba pomwe kumasunga mphamvu yotulutsa kuwala kwambiri popanda kufunikira njira zosinthira kuwala.

Gululi latsimikizira bwino kugwiritsa ntchito ukadaulo wa Micro LED wothandiza komanso wabwino kwambiri mu zipangizo zabuluu, zobiriwira za gallium nitride, ndi zofiira. M'tsogolomu, ukadaulo uwu uli ndi kuthekera kopanga zowonetsera za Micro LED za gallium nitride zamitundu yonse.