Applied Physics Express · 2008 · 64 citations · 3 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOptoelectronicsPhotonicsColor RenderingLight SourcesLight-emitting DiodesLuminescent MaterialsOptoelectronic MaterialsRare-earth-doped MaterialsExcitationExternal Quantum EfficiencyPhosphor MaterialsPhosphorescent MaterialsQuantum EfficiencyRare-earth-doped Luminescent MaterialsThermal QuenchingWhite Light-emitting Diodes
We developed a green-emitting phosphor Sr3Si13Al3O2N21:Eu2+ that is highly luminescent under excitation by blue light. It shows a highly efficient green luminescence whose external quantum efficiency reaches 67% for 460 nm excitation, and has small thermal quenching. Using this phosphor, we obtained white light-emitting diodes (LEDs) whose luminous efficacy and color rendering index Ra at 5330 K are 62 lm/W and 87, respectively. These features show that this green-emitting phosphor has high potential for application to white LEDs.
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