Fundamental absorption edge of NiO nanocrystals

Sokolov, V. I.; Druzhinin, A. V.; Кim, Grigory А.; Gruzdev, N. B.; Yermakov, A. Ye.; Уймин, М. А.; Бызов, И. В.; Щеголева, Н. Н.; Выходец, В. Б.; Куренных, Т. Е.

doi:10.1016/j.physb.2013.07.033

Cited by 18 publications

(9 citation statements)

References 24 publications

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“…A UV emission band was found at around 380 nm, which can be assigned to the well-known recombination of excitons. A broad and weak green emission was observed centering at 470 nm, which was related to the PL of surface states [19], indicating that the nanowires obtained in our experiment had abundant surface states on the surface.…”

Section: Resultsmentioning

confidence: 66%

Study of Schottky contact between Au and NiO nanowire by conductive atomic force microscopy (C-AFM): The case of surface states

Zhang

2015

Physica E: Low-dimensional Systems and Nanostructures

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Section: Resultsmentioning

confidence: 66%

Study of Schottky contact between Au and NiO nanowire by conductive atomic force microscopy (C-AFM): The case of surface states

Zhang

2015

Physica E: Low-dimensional Systems and Nanostructures

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“…Here we also have the optical density spectrum ad for the NiO 10 nm nanopowder from Ref. 16 . The contributions of these states in the PL and PLE spectra will be added up and therefore the allocation of a single contribution, to the PL spectrum for instance, is not reliable.…”

Section: Resultsmentioning

confidence: 99%

“…The deposition of very thin (several hundred nanometers thick) layers of Ni c Mg 1-c O (c ¼ 1.0) nanoparticles from the aqueous suspension onto a transparent quartz substrate allowed us to detect the optical density ad in the region of intense interband transitions, similar to Ref. 16. The samples for our measurements of the PL and PLE spectra were prepared by compressing tablets composed of Ni c Mg 1-c O nanopowders at a pressure of 0.5 GPa in order to achieve the best possible conditions for detecting luminescence.…”

Section: The Experimentsmentioning

confidence: 92%

Charge transfer transitions in optical spectra of NicMg1-cO oxides

Churmanov

Sokolov

Пустоваров

et al. 2017

Low Temperature Physics

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Radiative recombination with charge transfer was observed in Ni c Mg 1Àc O (c ¼ 0.008) oxides over the 8-300 K temperature range. This recombination occurs as a result of strong hybridization of the Ni 2þ ion 3d-states and the band states. The charge transfer radiation excitation spectrum shows vibrational LO repeats of two exciton lines having charge transfer energy intervals of about 35 meV. The NiO nanocrystal absorption spectrum shows two weak peaks with energies of 3.510 and 3.543 eV, which are highly dependent on temperature. They are interpreted as charge transfer excitons at the edge of NiO fundamental absorption. The distance between the charge transfer exciton lines in the Ni c Mg 1Àc O oxide spectra are caused by spin-orbit splitting of the valence band peak that was formed by the p-states of the oxygen ion. Published by AIP Publishing.

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“…A more detailed discussion was presented in Ref. [18]. From the very beginning, the charge transfer transitions cannot be resolved against the background intraion transitions.…”

Section: Resultsmentioning

confidence: 99%

“…On the one hand, it is gained owing to a small Ni concentration, which conditions the absence of d-d transitions, and, on the other hand, via an indirect observation of the p-d Absorption coefficient , cm -1 Fig. 3. (1) Extended spectrum of optical density of NiO nanocrystals, 10 nm, T ¼ 300 K [18]; and (2) optical absorption spectrum of Ni c Mg 1 À c O (c ¼0.0006, n Ni E3n10 19 cm À 3 ) single crystal [17]. exciton state with the charge transfer.…”

Section: Resultsmentioning

confidence: 99%