Electron-hole trapping centers in Na2SO4 with a transition metal impurity Mn

Nurakhmetov, Т.N.; Alibay, T.T.; Pazylbek, S.; Zhunusbekov, A.M.; Sadykova, B.M.; Tolekov, D.A.; Shamieva, R. K.; Nurpeissov, A.S.

doi:10.32523/ejpfm.2023070102

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…The authors of [18][19][20] studied the mechanisms of energy transfer to impurities in alkali metal sulfates, in activated CaSO 4 -Mn and Na 2 SO 4 -Cu crystals. The excitation spectra of impurities and intrinsic recombination emissions of the host were measured.…”

Section: Discussionmentioning

confidence: 99%

“…At photon energies between 6 and 12.4 eV, free electron-hole pairs are formed, which results in the formation of these recombination emissions. It has been experimentally shown that, upon excitation in the recombination emission bands at 3.0-3.1 eV and 2.6-2.7 eV, excitations appear corresponding to 3.9-4.0 eV and 4.45-4.5 eV [17][18][19][20] in the transparency region of the host. These excitation energies must correspond to the local levels of electron SO 3− 4 and hole SO − 4 trapping centers.…”

Section: Introductionmentioning

confidence: 99%

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Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO4-Mn and BaSO4-Mn

et al. 2023

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Spectroscopic and thermoactivation methods were used to study the processes of accumulation of electron and hole trapping centers and energy transfer of electronic excitations to impurities in CaSO4-Mn and BaSO4-Mn. It is shown that electronic trapping centers are created during the excitation of an anionic complex as a result of charge transfer from O2−→SO42− to closely spaced anionic complexes SO42− in CaSO4 and BaSO4. In CaSO4 and BaSO4, energy transfer from the host to impurities occurs at the moment of charge transfer from the excited anionic complex to the combined radiative electronic state at 2.95–3.1 eV. This combined state is formed from electronic trapping centers Mn+-SO4− and SO43−-SO4−. It was found that the emerging combined radiative states at 2.95–3.1 eV of sulfates, which are formed as a result of charge transfer from the excited anionic complexes to the excited state of impurities, Tl+,Cu+,and Mn2+, occupy the same energy levels as the intrinsic electronic trapping center SO43− of the host at 2.95–3.17 eV. Experimental results show that during UV photon irradiation, anionic complexes are excited mainly near impurities in sulfates.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO4-Mn and BaSO4-Mn

et al. 2023

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Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO<sub>4</sub>-Mn and BaSO<sub>4</sub>-Mn

Nurakhmetov¹,

Alibay²,

Zhangylyssov³

et al. 2023

Preprint

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Spectroscopic methods are used to study the processes of accumulation of electron and hole trapping centers and energy transfer of electronic excitations to impurities in CaSO4-Mn and BaSO4-Mn. It is shown that the transfer of energy from the host to impurities occurs at the moment of charge transfer from the excited anionic complex SO_4^(2-) to the hybrid radiative electronic states at 2.95–3.1 eV formed from the electronic states of the Mn^(+)-SO_4^(-) and SO_4^(3-)-SO_4^(-) trapping centers. It was found that, in sulfates, under irradiation, as a result of charge transfer from excited anionic complexes of the host to the excited states of impurities Tl^(+),Cu^(+),Mn^(2+), hybrid radiative states emerge at 2.95–3.15 eV, occupying the same energy levels as the intrinsic electronic trapping center SO_4^(3-) of the host at 2.95–3.1 eV.

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Divalent Manganese (Mn2+, 3d5) Charge Transfer Energies and Vacuum-Referred Binding Energies in Inorganic Compounds

Schuyt,

Williams,

Chong

2024

Preprint

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Electron-hole trapping centers in Na2SO4 with a transition metal impurity Mn

Cited by 3 publications

References 14 publications

Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO4-Mn and BaSO4-Mn

Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO4-Mn and BaSO4-Mn

Specific Features of Formation of Electron and Hole Trapping Centers in Irradiated CaSO<sub>4</sub>-Mn and BaSO<sub>4</sub>-Mn

Divalent Manganese (Mn2+, 3d5) Charge Transfer Energies and Vacuum-Referred Binding Energies in Inorganic Compounds

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