Fe solubility, growth mechanism, and luminescence of Fe doped ZnO nanowires and nanorods grown by evaporation-deposition

Abstract

Fe doped ZnO nanowires, nanorods, and urchin-like nanostructures have been grown using an evaporation-deposition method with compacted mixtures of ZnS and Fe 2 O 3 powders, with different Fe contents as precursors. Treatments at 950 C under argon flow lead to the growth of iron doped nanowires, nanorods, and other nanostructures on the surface of the compacted sample. The incorporation of iron into the nanostructures has been investigated via energy dispersive spectroscopy as well as by cathodoluminescence in a scanning electron microscope and photoluminescence in an optical microscope. The iron content in the structures is limited to the range of 0.5-0.7 at.% and does not depend on the content in the precursor. Bright and dark field imaging and twist contour analysis via transmission electron microscopy support the possibility of a dislocation driven growth of the nanowires.

Recombination processes in Te‐doped ZnO microstructures

“… and some differences in the CL spectra due to Te doping of ZnO were observed. This behaviour has been observed in many other systems .…”

Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

“…Previously, in many works [61] it was specified that when using gas-phase methods for producing NPs, irrespective of Fe mass content in targets, the mass content of Fe dopant in the final product does not exceed 1 mass% that will be coordinated in relation to ours by results.…”

“…In works [61][62][63][64] it is shown that Fe ions in nanomaterials (thin films, various nanostructures, nanopowders, etc.) on the basis of ZnO-Fe can be in two-or three-valent condition separately, and in the mixed valent condition, depending on the method and conditions of producing materials.…”

Nature of red luminescence in oxygen treated hydrothermally grown zinc oxide nanorods

“…2(c), slightly red shifts to 1.69 eV and the FWHM narrows to 0.57 eV, which can be interpreted by a configurational coordinate (CC) model [24]. Furthermore the absence of any fine structure in the peak at 15 K eliminates the assignment of the observed RL to transition metal impurities, such as Fe, Co and Ni, which exhibit characteristic sharp features due to internal 3d transitions [25,26]. The presence of a broad emission at 2.5 eV has been attributed to surface and bulk V O centers at 5 K [19,27].…”