Optical and structural properties of Zn1−x Mg x O ceramic materials

Othman, Zayani Jaafar; Matoussi, Adel; Fabbri, Filippo; Rossi, Francesca; Salviati, G.

doi:10.1007/s00339-014-8279-5

Cited by 30 publications

(8 citation statements)

References 42 publications

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“…This means some amount of unreacted ZnO phase in the annealed films. This agrees with the results of Raman study as well as with the results of other investigations on ZnMgO ceramics . At the same time, the (002) diffraction peak of wurtzite phase (Figure b) shows a smooth shifting of the whole peak with T S increase rather than formation of two separate peaks that can be ascribed to ZnO and wurtzite ZnMgO phases as it has been observed in ref.…”

Section: Resultssupporting

confidence: 92%

“…At the same time, the (002) diffraction peak of wurtzite phase (Figure b) shows a smooth shifting of the whole peak with T S increase rather than formation of two separate peaks that can be ascribed to ZnO and wurtzite ZnMgO phases as it has been observed in ref. . This can be due to relatively large FWHM of the (002) peak that hinders observation of the signals from two hexagonal phases.…”

Section: Resultsmentioning

confidence: 99%

“…The phase diagram of ZnO‐MgO binary system predicted a pure wurtzite Zn 1‐x Mg x O alloy with Mg content up to about 4% . The solubility limit of Mg in hexagonal Zn 1‐x Mg x O alloy produced under thermodynamic conditions has been shown to be about 20%, although formation of the hexagonal and cubic ZnMgO phases occurs simultaneously . In the films grown under metastable conditions, pure wurtzite Zn 0.6 Mg 0.4 O phase has been reported .…”

Section: Introductionmentioning

confidence: 99%

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The Effect of High Temperature Annealing on the Photoluminescence of ZnMgO Alloys

Borkovska

Khomenkova

Маркевич

et al. 2018

Physica Status Solidi (a)

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The effect of thermal annealing on the luminescence of wurtzite ZnMgO alloys in the films and ceramics produced by solid state reaction route is investigated. Formation of hexagonal ZnMgO phase is proved by X‐ray diffraction, micro‐Raman, photoluminescence (PL), and PL excitation methods. Mg starts incorporating into ZnO lattice at 700 °C, and its content increases with the increase of the annealing temperature up to 1000 °C. Nevertheless, in the PL spectra of the films annealed in air at 1000 °C, excitonic and defect‐related emissions from residual ZnO phase dominate, while those from the ZnMgO alloy are weak. The annealing in Zn vapor results in even weaker ZnMgO PL. In ceramics sintered in the air at 1000 °C, the PL from wurtzite ZnMgO phase is found to be strongly supressed on the surface and bright in the depth of a pellet. The gettering of Na, K, and Ca residual impurities at the surface of the samples under annealing is proved by Secondary ion mass spectrometry. It is proposed that degradation of ZnMgO PL in the near surface region is caused mainly by intense thermal decomposition of wurtzite ZnMgO phase accompanied by generation of non‐radiative defects.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of High Temperature Annealing on the Photoluminescence of ZnMgO Alloys

Borkovska

Khomenkova

Маркевич

et al. 2018

Physica Status Solidi (a)

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“…This type of electrical behaviors is observed for ionic disordered ceramics [21][22][23][24][25][26]. The augmentation of dc conductivity is mainly caused by the thermal activation of carrier traps in doped ZnO pellets [12,19]. The variation of the dc…”

Section: Ac Conductivity Studymentioning

confidence: 85%

“…Also, it is observed that the grain sizes of each of ZnO/TiO 2 composition exhibit a decrease with the increase in TiO 2 content. This can be interpreted in terms of lattice distortion and the segregation effects of crystalline phases [19,12].…”

Section: Structural Properties Of the Zno/tio 2 Compositesmentioning

confidence: 99%