Abstract
This report mentioned the synthesis of self-assembly Al1-xLuxAs quantum dot nanocrystals using the L-Glutamine-assisted wet chemical route. The effect of Lu-doping on the structural phase, lattice strain, and deformation lattice energy was studied. The morphology and elemental compositions were emphasized using transmission electron microscopy, selected area of electron diffraction, and energy dispersive X-ray spectroscopy. The effect of Lu-doping on the oxidation state and vibrational modes was studied using X-ray photoelectron spectroscopy and Raman scattering spectroscopy. The influence of Lu-dopant on the optical bandgap and Urbach tail energy of AlAs nanocrystals was investigated. The tendency of Lu doping to create localized levels inside the band gap of AlAs gives rise to an increase in plasma frequency and a decrease in the high-frequency dielectric constant. The Lu-dopant improved the conductivity and the charge carrier mobility of AlAs nanocrystals. The luminescence measurements revealed the ability of Lu-dopant to suppress the crystal defects of the AlAs nanocrystals. The Lu doping improved the quantum yield (84 %) and the luminescent emission spectra of the AlAs QDs by 7-fold. The prepared self-assembly Al1-xLuxAs quantum dots revealed great encouragement for developing Al1-xLuxAs quantum dot diode lasers and optical broadbands.
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