Effect of calcination atmosphere on photoluminescence properties of nanocrystalline ZrO2 thin films prepared by sol–gel dip coating method

Lakshmi, Jaya; Berlin, I. John; Daniel, Georgi P.; Thomas, P.V.; Joy, K.

doi:10.1016/j.physb.2011.05.004

Cited by 39 publications

(21 citation statements)

References 36 publications

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“…[6][7][8][21][22][23][24][25] This PL emission originates from defect states caused by the different structural defects [6][7][8]22 that can explain a variety of observed PL bands. These latter are attributed usually to intrinsic defects such as oxygen vacancies 26 or their complexes located in the crystal volume, 6,27 at grain surface 7 or near impurities.…”

mentioning

confidence: 99%

Structural and Luminescent Properties of (Y,Cu)-Codoped Zirconia Nanopowders

Korsunska

Baran

Polishchuk

et al. 2015

ECS J. Solid State Sci. Technol.

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The effect of both CuO content (1 and 8 mol%) and calcination temperature (T c = 500-1000 • C) on light emitting and structural properties of ZrO 2 -Y 2 O 3 -CuO nanopowders was studied by photoluminescence (PL), X-ray diffraction (XRD) and Raman scattering methods. The samples, calcinated at T c = 500-700 • C, contain the tetragonal ZrO 2 phase predominantly. The increase of T c results in its transformation to monoclinic one, and the phase transformation happens at higher temperature at higher Cu content. It is shown that the increase of T c from 500 to 800 • C results in the Cu incorporation into nanocrystals from the surface entities. This manifests itself in the shift of XRD and Raman peaks of tetragonal phase. The PL spectra demonstrate the presence of two main PL components peaked at about 540 nm and 630 nm in the most samples. The increase of T c from 500 to 1000 • C results in the non-monotonic variation of total PL intensity as well as in minor changes in PL spectra shape. The evolution of PL intensity is explained by both the increase of a crystallinity degree and the variation of the concentration of non-radiative recombination centres. The transformation of PL spectra shape is ascribed to the appearance of radiative Cu Zr centres.

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confidence: 99%

Structural and Luminescent Properties of (Y,Cu)-Codoped Zirconia Nanopowders

Korsunska

Baran

Polishchuk

et al. 2015

ECS J. Solid State Sci. Technol.

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“…The small shoulder at 530.7 eV is assigned to lattice oxygen while the main peak at 532.6 eV may be attributed to oxygen in adsorbed hydroxyl groups. The existence of multipeaks (530.7 and 532.6 eV) is related to the presence of oxygen defects [38]. The Sn 3d 5/2 located at about 486.4 eV, demonstrates that the chemical state of Sn in the sample is +4.…”

Section: X-ray Diffraction Studiesmentioning

confidence: 93%

Band gap and superior refractive index tailoring properties in nanocomposite thin film achieved through sol–gel co-deposition method

Joy¹,

Lakshmy²,

Nair³

et al. 2012

Journal of Alloys and Compounds

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“…The emission peaks were observed at 389 nm (3.18 eV), 306 nm (4.05 eV), 602 nm (2.05 eV) and 767 nm (1.61 eV). The energy gap of tetragonal ZrO 2 phase is greater than 5.5 eV [1][2][3]. At 243 nm (5.11 eV) excitation a large intensity emission band of 390 nm is produced.…”

Section: Optical Studiesmentioning

confidence: 99%

“…Of this class, wide-band gap oxide semiconductor of zirconia (ZrO 2 ) has occupied the forefront in the past decade [1][2][3] because of large binding energy of ZrO 2 has an ideal choice for inorganic passivation shells in a variety of semiconductor core/ shell nanoparticles. It is now well known that the metal doped ZrO 2 has the high potential for fabricating novel nanoelectronics and optical devices with enhanced performance.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the crystalline structure, surface morphology and film composition of the films were also determined. The basis of the technique is to coat a substrate with a precursor solution containing the requisite metal components in the required proportion, which transforms to a gel layer because of solvent evaporation and/or chemical reactions [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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