Origin of efficiency droop in GaN-based light-emitting diodes

Minho Kim, M. Schubert, Qi Dai, +4

Applied Physics Letters

Polarization FieldsPhotonicsElectrical EngineeringSolid-state LightingEngineering +11

Internal quantum efficiency and nonradiative recombination coefficient of GaInN/GaN multiple quantum wells with different dislocation densities

Qi Dai, M. Schubert, M. H. Kim, +8

Applied Physics Letters

Wide-bandgap SemiconductorOptical MaterialsEngineeringNonradiative Recombination CoefficientOptoelectronic Devices +15

Carrier recombination mechanisms and efficiency droop in GaInN/GaN light-emitting diodes

Qi Dai, Qifeng Shan, Jing Wang, +7

Applied Physics Letters

Wide-bandgap SemiconductorPhotonicsElectrical EngineeringSolid-state LightingEngineering +13

Transport-mechanism analysis of the reverse leakage current in GaInN light-emitting diodes

Qifeng Shan, David S. Meyaard, Qi Dai, +4

Applied Physics Letters

EngineeringOptoelectronic DevicesSemiconductorsElectronic DevicesLight-emitting Diodes +15

On the symmetry of efficiency-versus-carrier-concentration curves in GaInN/GaN light-emitting diodes and relation to droop-causing mechanisms

Qi Dai, Qifeng Shan, Jaehee Cho, +5

Applied Physics Letters

PhotonicsElectrical EngineeringSolid-state LightingEfficiency-versus-carrier-concentration CurvesPhase-space Filling +13

SVFormer: Semi-supervised Video Transformer for Action Recognition

Zhen Xing, Qi Dai, Hu Han, +3

Machine VisionMachine LearningImage AnalysisData SciencePattern Recognition +13

A proposed lighting-design space: circadian effect versus visual illuminance

Qi Dai, Wenjing Cai, Wen Shi, +2

Building and Environment

Illumination ModelingLight RegulationAlertnessMedicineDesign +4

On the temperature dependence of electron leakage from the active region of GaInN/GaN light-emitting diodes

David S. Meyaard, Qifeng Shan, Qi Dai, +4

Applied Physics Letters

Wide-bandgap SemiconductorEngineeringTemperature DependenceElectron LeakageActive Region +14

Circadian-effect engineering of solid-state lighting spectra for beneficial and tunable lighting

Qi Dai, Qifeng Shan, Hien Lam, +3

Optics Express

EngineeringLighting TechnologySolid-state Lighting SpectraRgb ChipsCaf Tunability Range +18

The impact of room surface reflectance on corneal illuminance and rule-of-thumb equations for circadian lighting design

Wenjing Cai, Jiguang Yue, Qi Dai, +5

Building and Environment