Ionic-liquid-based synthesis of GaN nanoparticles
Hannah F. Gaiser, Radian Popescu, Dagmar Gerthsen, Claus Feldmann
Abstract
GaN nanoparticles, 3-8 nm in diameter, are prepared by a microwave-assisted reaction of GaCl3 and KNH2 in ionic liquids. Instantaneously after the liquid-phase synthesis, the β-GaN nanoparticles are single-crystalline. The band gap is blue-shifted by 0.6 eV in comparison to bulk-GaN indicating quantum confinement effects. The GaN nanoparticles show intense green emission with a quantum yield of 55 ± 3%.
Topics & Concepts
Ionic liquidYield (engineering)NanoparticleMaterials scienceBand gapQuantum yieldIonic bondingMicrowaveChemical engineeringNanotechnologyOptoelectronicsChemistryOrganic chemistryCatalysisIonFluorescenceOpticsPhysicsMetallurgyEngineeringQuantum mechanicsGaN-based semiconductor devices and materialsZnO doping and propertiesSemiconductor materials and devices