Effect of La doping on the lattice defects and photoluminescence properties of CuO

Devi, L. Vimala; Selvalakshmi, T.; Sellaiyan, S.; Uedono, Akira; Sivaji, K.; Lee, Sejoon

doi:10.1016/j.jallcom.2017.03.148

Cited by 77 publications

(22 citation statements)

References 44 publications

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“…† Meanwhile, the peak broadening could be attributed to the induced defects caused by the moderately larger size of lanthanum ions (La = 1.03 Å) compared to copper ions (La = 0.73 Å). 35 Similarly, the change in the intensity and peak position reveals that doping affects the d spacing, lattice parameter and crystal quality. 36 However, Bragg's reflection (400) and (411) at 2 θ of 30.6° and 33.7° correspond to the cubic La 2 O 3 phase (JCPDS card no.…”

Section: Resultsmentioning

confidence: 99%

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

et al. 2022

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“…Considering the relationship between (a) and (b) in Figure 1, it can be inferred that the presence or absence of oxygen defects plays a role. It is known that energy is exchanged between rare-earth ions in rare-earth doped phosphors, and the energy used for luminescence is lost with the increase of oxygen defects [17] [18], resulting in a decrease in the overall fluorescence intensity.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Crystal Structure Based on Experimentally Obtained XRD Patterns for Fluorescence of Sm<sup>3+</sup>-Doped TiO<sub>2</sub> Thin Films by Machine Learning

Tamamoto¹,

Murayama²,

Zhao³

2022

OPJ

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The luminescence intensity of rare-earth ion-doped luminescent materials is closely related to the configuration of the anions around the rare-earth ions added to the host material and the lattice defects. And it is expected that this information will be reflected in the XRD pattern. In this study, the luminescence data and XRD patterns of Sm-doped TiO 2 accumulated by our group are used to construct a model to predict the integrated luminescence intensity. The model was confirmed to be able to predict the integrated luminescence intensity with high accuracy. Furthermore, we found that the integrated luminescence intensity of this system is closely related to the change in the position of the peak on the (200) plane of TiO 2 .

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“…The charge imbalance and ionic radius mismatch between Cu and Ni ions result in the lattice distortion. It will further change the crystallization quality of CuO . All the films show a pure monoclinic phase structure ( Cc ), and no impurity phase associated with Ni is observed in the prepared films.…”

Section: Resultsmentioning

confidence: 99%

Composition Dependence of Optical Properties and Band Structures in p-Type Ni-Doped CuO Films: Spectroscopic Experiment and First-Principles Calculation

et al. 2019

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Despite much attention on the photoelectronic device applications of CuO-based materials, a thorough analysis of optical properties and electronic band structure of Ni-doped CuO films is still necessary. Here, the calculation based on the density functional theory revealed a strong hybridization of O 2p and Cu 3d orbits near the conduction band minimum (CBM) and valence band maximum (VBM) of CuO films. The Ni addition is found to enhance the carrier mobility, because the weaker localization of O 2p states at the VBM is observed in 50 atom % doped CuO. To confirm the theoretical results, the ellipsometric spectra of solution-processed CuO films doped by Ni ions (from 0 to 50 atom %) were fitted, and the optical constants were uniquely extracted. The optical conductivity has a linear increase with the Ni doping concentration, which results from the decreased electron traps. Besides, the band gap was found to be modulated in a range of 2.22–2.37 eV owing to the quantum confinement effects. The variation trend is confirmed by the first-principles calculation, where the computational indirect band gap is 1.27 and 1.79 eV for pure CuO and 50 atom % Ni-doped CuO. Four electronic transitions are observed at ∼2.75, 3.27, 4.01, and 4.90 eV, and the physical origins have been discussed.

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Effect of La doping on the lattice defects and photoluminescence properties of CuO

Cited by 77 publications

References 44 publications

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

Optimization of Crystal Structure Based on Experimentally Obtained XRD Patterns for Fluorescence of Sm<sup>3+</sup>-Doped TiO<sub>2</sub> Thin Films by Machine Learning

Composition Dependence of Optical Properties and Band Structures in p-Type Ni-Doped CuO Films: Spectroscopic Experiment and First-Principles Calculation

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Effect of La doping on the lattice defects and photoluminescence properties of CuO

Cited by 77 publications

References 44 publications

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

Functionalized thiazolidone-decorated lanthanum-doped copper oxide: novel heterocyclic sea sponge morphology for the efficient detection of dopamine

Optimization of Crystal Structure Based on Experimentally Obtained XRD Patterns for Fluorescence of Sm&lt;sup&gt;3+&lt;/sup&gt;-Doped TiO&lt;sub&gt;2&lt;/sub&gt; Thin Films by Machine Learning

Composition Dependence of Optical Properties and Band Structures in p-Type Ni-Doped CuO Films: Spectroscopic Experiment and First-Principles Calculation

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Optimization of Crystal Structure Based on Experimentally Obtained XRD Patterns for Fluorescence of Sm<sup>3+</sup>-Doped TiO<sub>2</sub> Thin Films by Machine Learning