Jun 1, 2008 · Our present study uses optical absorption, PL, and EPR to investigate the oxygen and zinc vacancies produced in a bulk ZnO crystal by irradiating near room temperature with 1.5 MeV electrons.

Nov 18, 2020 · Due to the small size of the particles and the difference between the ionic radii of Fe 3+ and Zn 2+, the EPR spectra are strongly influenced by a static distribution of ZFS parameters, leading to a severe lineshape broadening. An efficient strategy for the simulation process is explained in detail.

Oct 15, 2020 · The magnetic and electronic properties of the hydrogenated highly conductive zinc oxide (ZnO) microparticles were investigated by electron paramagnetic resonance (EPR) and contactless...

Sep 13, 2012 · Thanks to static (PL and EPR) and dynamic (EPR) in situ characterizations, the conditions of formation or filling of oxygen vacancies are discussed depending of the atmosphere and temperature of the pretreatment of kadox and ex-carbonate zinc oxide.

Aug 1, 2021 · The presence of newly created defects in ZnO was determined by X-ray diffraction, PL, visible Raman spectroscopy, as well as electron paramagnetic resonance (EPR), which clearly stated that their introduction was beyond several surface atomic layers.

Feb 25, 2008 · Electron paramagnetic resonance (EPR) has been used to monitor oxygen vacancies and zinc vacancies in a ZnO crystal irradiated near room temperature with 1.5 MeV electrons. Out-of-phase detection at 30 K greatly enhances …

May 23, 2010 · The most successful experimental technique for identifying and studying the defects in semiconductors is electron paramagnetic resonance (EPR), detected either directly (EPR and photo-EPR) or optically [optical detection of magnetic resonance (ODMR)].

Apr 1, 2023 · The current study presents a detailed multi-frequency (X- and Q-band) EPR investigation that clarifies the localization of the dopant ion, its site symmetry, and the formation of intrinsic-extrinsic defect complexes in ZnO:TM. •

Mar 2, 2022 · Both PL and EPR are simultaneously adopted to systematically elucidate the defect centers of green luminescence (GL) as well as the EPR peak g = 1.96 of ZnO and the relationship between them. The PL of ZnO QDs reveals that GL of 2.21–2.31 eV disappears at excitation wavelengths > 400 nm.

Jul 26, 2012 · Structural and optical properties of ZnO nanoparticles can be fine tuned by a novel variant of milling performed at cryogenic temperatures. In this study intrinsic defect centers such as oxygen and zinc vacancies are characterized using electron paramagnetic resonance (EPR) and photoluminescence (PL) spectroscopy.