Ultra-low-defect homoepitaxial micro-LEDs with enhanced efficiency and monochromaticity for high-PPI AR/MR displays
Liu Y, Wang G, Feng F, Zhanghu M, Yuan Z, Li Z, Xu K, Kwok H, Liu Z. Ultra-low-defect homoepitaxial micro-LEDs with enhanced efficiency and monochromaticity for high-PPI AR/MR displays. PhotoniX 2024, 5: 23. DOI: 10.1186/s43074-024-00137-4.Peer-Reviewed Original ResearchGaN-on-GaNOptoelectronic propertiesEfficiency droop ratioEmission wavelengthMicro-LEDsGaN-on-sapphireCrystal qualityMicro-displaysCm-2High luminanceMicro-display applicationsMicro-LED devicesGaN substratesSapphire substratesDroop ratioEfficiency droopSeries resistanceGallium nitrideEnhanced efficiencyStrong ambient lightStep-edge-guided nucleation and growth mode transition of α-Ga2O3 heteroepitaxy on vicinal sapphire
Hao J, Zhang Y, Zhang Y, Xu K, Han G, Ye J. Step-edge-guided nucleation and growth mode transition of α-Ga2O3 heteroepitaxy on vicinal sapphire. Chinese Physics B 2024, 33: 086104. DOI: 10.1088/1674-1056/ad4ff6.Peer-Reviewed Original ResearchGrowth mode transitionGrowth modeDislocation densityTerrace widthCm-2Epitaxial growth modeIncreased dislocation densityNeighboring nucleiFlat sapphire surfaceTwo-dimensional (2DSurface morphology degradationSubstrate terracesVicinal sapphireMaterial propertiesSurface roughnessTerrace edgesDevice performanceMiscut angleCoherent growthSapphire substratesSemiconductor layerEdge dislocationsHeteroepitaxial layersMode transitionNucleation distanceFlexible arrays of GaN-based Micro-LEDs fabricated on different substrates by a laser lift-off process
Yue L, Xu J, Wang X, Zhou J, Wang Y, Yao L, Niu M, Wang M, Cao B, Xu Y, Wang J, Xu K. Flexible arrays of GaN-based Micro-LEDs fabricated on different substrates by a laser lift-off process. Japanese Journal Of Applied Physics 2024, 63: 051007. DOI: 10.35848/1347-4065/ad46af.Peer-Reviewed Original ResearchMicro-LED arrayLaser lift-offMicro-LEDsPolyethylene terephthalateLaser lift-off processHigher laser energy densityLift-off processGaN-based micro-LEDLaser energy densityLaser lift‐off technologyBending radiusFlexible displaysLift-offThreshold voltageCopper foilGallium nitrideCu substrateEnergy densitySapphire substratesInternet-of-Things eraFlexible arrayInternet-of-ThingsEL spectraKrF excimer laser system