Journal ArticleDOI
Oxygen vacancies in ZnO
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In this article, the absorption and emission properties of the neutral oxygen vacancy in ZnO were investigated using temperature-dependent photoluminescence (PL) experiments, and the Mollwo-Ivey relation for the position of the F-centre absorption as a function of the anion-cation distance was applied to find that the oxygen vacancies fit perfectly in the line given by MgO, CaO, SrO and BaO.Abstract:
We present our investigations on the absorption and emission properties of the neutral oxygen vacancy in ZnO. Temperature-dependent photoluminescence (PL) experiments allow to determine the zero-phonon-energy of the emission and its phonon-coupling parameters. The absorption to the singlet excited state is observed in PL-excitation experiments at energies above 3.1 eV. Relaxation drives the system from the singlet, diamagnetic, excited state to the emissive, paramagnetic triplet state. Applying the Mollwo–Ivey relation for the energetical position of the F-centre absorption as a function of the anion–cation distance, we find that the oxygen vacancies in ZnO fit perfectly in the line given by MgO, CaO, SrO and BaO.read more
Citations
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References
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Journal ArticleDOI
First-principles study of native point defects in ZnO
TL;DR: In this paper, the first principles pseudopotential method was used to determine the electronic structure, atomic geometry, and formation energy of native point defects in ZnO and showed that both the Zn and O vacancies are the relevant defects.
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Line Profiles in the Far-uv Absorption Spectra of the Rare Gases
TL;DR: The line profiles of a dozen series of widely different appearance, observed recently in the rare-gas optical absorption spectra between 20 and 100 eV, are analyzed by adapting and extending previously developed theory as mentioned in this paper.
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The Oxygen Vacancy as the Origin of a Green Emission in Undoped ZnO
TL;DR: In this article, the authors investigated undoped ZnO single crystals, which are commercially available from Eagle-Picher, by photoluminescence (PL) and optically detected magnetic resonance (ODMR) spectroscopy.
Journal ArticleDOI
Nature of Luminescence Transitions in ZnS Crvstals
TL;DR: In this article, emission spectra from typical luminescence centers, such as Green-Cu, Blue-Cu and Self-Activated, were measured at various temperatures, and it was shown that these luminescences can be divided into two growps, A and B.