Experimental and modeling study of ZnO:Ni nanoparticles for near-infrared light emitting diodes

Abstract

This work is devoted to the synthesis and study of the different properties of ZnO nanoparticles (NPs) doped with the Ni element.

Summerfield scaling model and electrical conductivity study for understanding transport mechanisms of a Cr3+ substituted ZnAl2O4 ceramic

“…The experimental lattice parameter a is calculated from the following equation 38 : with ( hkl ) being the Miller indices.…”

A far-red-emitting ZnAl1.95Cr0.05O4 phosphor for plant growth LED applications

“…These interactions are expressed using Racah tensor algebra methods and their effects are evaluated using perturbation theory. The entire Hamiltonian used to investigate the structure of electronic energy levels is provided by: 53 H = H 0 + H ee ( B , C ) + H Trees ( α ) + H CF ( B , C , Dq) + H SO ( ζ 3d ) H 0 is the Hamiltonian configuration, H Trees ( α ) is the Trees correction Hamiltonian, and H ee ( B , C ) is the Coulomb interaction including electron–electron repulsions. This Hamiltonian gives the 2S+1 L terms: two quartet terms ( 4 P excited state and 4 F ground state) and six doublet excited terms ( 2 G, 2 H, 2 D, 2 F, 2 D′ and 2 P) with a 3d 3 configuration for the Cr 3+ ion.…”

Photoluminescence and Photocatalytic Properties of MWNTs Decorated with Fe-Doped ZnO Nanoparticles

“…In addition, Fe 2+ ions can receive and electron form unstable Fe 1+ ions, which will further interact with the O 2 molecules, generating O 2 − and Fe 2+ ions [ 33 ]. In addition, the photogenerated electrons can move to the Zn i levels, followed by transitions towards the V O and V Zn levels, leading to radiative emissions [ 42 , 59 ]. The remaining holes in the ZnO VB will pass to the MWCNT via impurity levels in the ZnO bandgap and can interact with the H 2 O molecules, generating •OOH reactive species [ 33 ].…”