Biexciton emission from sol-gel ZnMgO nanopowders

Abstract

Surface related and intrinsic exciton recombination dynamics in ZnO nanoparticles synthesized by a sol-gel method Appl. Phys. Lett. 102, 013109 (2013); 10.1063/1.4774002 High-excitation effect on photoluminescence of sol-gel ZnO nanopowder Appl. Phys. Lett. 96, 081903 (2010); 10.1063/1.3327338 Sol-gel synthesis and nonlinear optical transmission in Zn ( 1 − x ) Mg ( x ) O ( x 0.2 ) thin films Appl. Phys. Lett. 89, 063102 (2006); 10.1063/1.2335375 Confinement-enhanced biexciton binding energy in ZnO/ZnMgO multiple quantum wells

Lattice Dynamics and Crystalline Properties of Wurtzite Zn1–xMgxO Powders under High Pressure

“…Zn 1– x Mg x O ( x = 0, 3.0, 7.0, and 10.0%) powders were synthesized by the citric-acid-assisted sol–gel method as described elsewhere. , The wurtzite phase of the Zn 1– x Mg x O powders at ambient pressure was identified by XRD. The morphology of the powders was studied using scanning electron microscopy (SEM).…”

“…The deviations of Mg contents at various positions in the samples were 3.0 ± 0.3%, 7.0 ± 0.5%, and 10.0 ± 0.5%, as determined by EDX measurements. The photoluminescence , and Raman spectra recorded at different positions throughout the samples were all identical.…”

Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders

“…1,2 In our previous letter, we reported the biexcitonic emissions of sol-gel Zn 1Àx Mg x O powders. 3 It was found that the emission of a longitudinal-optical (LO) phonon sideband is obvious in the sol-gel Zn 1Àx Mg x O powders at high temperature (T). As excitation density increases, the exciton-phonon interaction competed with the inelastic exciton-exciton scattering process, which is an important transition for stimulated emission in ZnO-based nanostructures.…”

Manifestation of spin-spin interaction between oxygen vacancy and magnesium in ZnMgO nanorods by electron paramagnetic resonance studies

“…[1][2][3][4] Incorporating Mg into ZnO thin film has already been proved to be a feasible technique to realize band gap tuning since the band gap of wurtzite ZnO is 3.37 eV and that of MgO is 7.4 eV. 5 Additionally, ZnMgO can be used as barrier layers for carrier confinement as well as in waveguides and distributed Bragg reflectors.…”