Temperature dependence of luminescence properties of praseodymium-doped perovskite CaTiO3:Pr3+

Inaguma, Yoshiyuki; Tsuchiya, Takeshi; Mori, Yuki; Imade, Yuki; Sato, Nobuhisa; Katsumata, Tetsuhiro; Mori, Daisuke

doi:10.1016/j.tca.2011.02.036

Cited by 34 publications

(21 citation statements)

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“…Pr 3+ ‐doped CaTiO 3 is known to show red color in cathodoluminescence (CL) as well as photoluminescence (PL) . Similar red PL was observed in Pr 3+ ‐doped SrTiO 3 and (Ca,Sr)TiO 3 , and the intensity of the Pr 3+ ‐doped SrTiO 3 was found to increase by Al 3+ codoping .…”

Section: Introductionmentioning

confidence: 73%

Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

Yamamoto

Ueda

2017

Physica Status Solidi (a)

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The energy levels of Ln 3þ 4f ground states in CaTiO 3 are analyzed using X-ray photoelectron spectroscopy (XPS). The Ln 4f states in the XPS spectra are extracted utilizing large photoionization cross section differences between Ln 4f and O 2p states. The Ln 3þ 4f energy levels referred to the valence band maximum are evaluated to be 0.8 eV for Pr 3þ , À5.0 eV for Gd 3þ , 0.9 eV for Tb 3þ , and À4.6 eV for Lu 3þ from the extracted XPS spectra. Although the obtained values of Gd 3þ and Lu 3þ 4f levels are deeper in the valence band, the values of Pr 3þ and Tb 3þ 4f levels are in good agreement with those reported previously. The difference in the photoluminescence colors between Pr 3þ -doped CaTiO 3 and CaZrO 3 is simply explained from the Pr 3þ 4f energy levels located in the bandgaps.

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Section: Introductionmentioning

confidence: 73%

Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

Yamamoto

Ueda

2017

Physica Status Solidi (a)

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“…Eu 3+ doped CaTiO 3 does not show any evidence for a CT band 33 suggesting that E CT > E X (see arrow 2). The Pr 3+ IVCT band is well observed at 380 nm (3.25 eV, see arrow 3), 30,32,34 and this forms the most important parameter to construct the VRBE scheme. The binding energies with respect to the conduction band are almost the same as in TiO 2 , and like in TiO 2 emission from the 3 For SrTiO 3 , and BaTiO 3 again U (6, A) = 6.7 eV is chosen.…”

Section: Methodsmentioning

confidence: 99%

The Electronic Structure of Lanthanide Impurities in TiO₂, ZnO, SnO₂, and Related Compounds

Dorenbos

2013

ECS J. Solid State Sci. Technol.

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The vacuum referred binding energy of electrons in the 4f n levels for all divalent and trivalent lanthanide impurity states in TiO 2 , ZnO, SnO 2 , and related compounds MTiO 3 and MSnO 3 (M = Ca 2+ , Sr 2+ , Ba 2+ ) and Ca 2 SnO 4 are presented. They are obtained by collecting data from the literature on the spectroscopy of lanthanide ions, and by combining that data with the chemical shift model. The model provides the energy at the top of the valence band and at the bottom of the conduction band, and it will be shown that those energies are in excellent agreement with what is known from techniques like photo-electron spectroscopy and electrochemical studies. Electronic level diagrams are presented that explain and predict aspects like absence or presence of lanthanide 4f-4f or 5d-4f emissions and the preferred lanthanide valence. © 2013 The Electrochemical Society. [DOI: 10.1149/2.005403jss] All rights reserved.Manuscript received October 17, 2013. Published December 20, 2013 Recently the chemical shift model was introduced 1 for the lanthanide impurities in compounds. By using spectroscopic data for different lanthanides like Ce 3+ , Pr 3+ , Tb 3+ , Eu 3+ , Yb 3+ in the same compound, the model enables to derive the electronic structure with the absolute electron binding energies, i.e., relative to the energy of the electron at rest in vacuum, in all divalent and all trivalent lanthanides.2 It has been applied to about 50 different compounds (fluorides, chlorides, aluminates, phosphates, borates etc.) and full consistency with available experimental data from different fields of science was demonstrated.2-4 It was found that in inorganic compounds based on rare earth cations, like YPO 4 and LaBO 3 , and/or alkaline and/or alkaline earth cations like CaF 2 and CaGa 2 S 4 , the binding energy at the bottom of the conduction band E C is typically near −2 eV. Sc-based compounds like ScBO 3 and ScPO 4 tend to show lower values for E C which was attributed to a large binding energy of electrons in the 3d-shell of Sc 3+ /Sc 2+ that forms the bottom of the conduction band. 4 In this work the model will be applied to TiO 2 , ZnO, SnO 2 , and related ternary compounds. The compounds were selected because of their high importance for many applications.TiO 2 has been and still is thoroughly investigated for its photocatalytic activity and ability for photoelectrochemical water splitting. 5The activity can be enhanced or modified by doping with transition metal or rare earth ions. 6,7 Much is already known on the electronic structure and properties of this compound in its various crystallographic appearances, i.e., rutile-TiO 2 , anatase-TiO 2 , and brookiteTiO 2 . Here we will focus on the anatase-phase. ZnO is an important member of the II-VI semiconductor family. An extensive review on the physical and optical properties of ZnO can be found in Ref. 8. At ambient conditions only the wurtzite phase is thermodynamic stable and all data and schemes in this work will pertain to that phase. SnO 2 has much in common with Zn...

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“…Inaguma and co-authors [9] recently reported on structural anomalies that occurred when praseodymium ions with different oxidation states were incorporated into ferroelectric CT materials using the traditional solid-state reaction.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study

Gonçalves

Lima

Godinho

et al. 2015

Ceramics International

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Temperature dependence of luminescence properties of praseodymium-doped perovskite CaTiO3:Pr3+

Cited by 34 publications

References 32 publications

Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

The Electronic Structure of Lanthanide Impurities in TiO₂, ZnO, SnO₂, and Related Compounds

Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study

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Temperature dependence of luminescence properties of praseodymium-doped perovskite CaTiO3:Pr3+

Cited by 34 publications

References 32 publications

Ln3+ 4f Energy Levels in CaTiO3 Analyzed by XPS Measurements

Ln3+ 4f Energy Levels in CaTiO3 Analyzed by XPS Measurements

The Electronic Structure of Lanthanide Impurities in TiO2, ZnO, SnO2, and Related Compounds

Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study

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Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

Ln³⁺ 4f Energy Levels in CaTiO₃ Analyzed by XPS Measurements

The Electronic Structure of Lanthanide Impurities in TiO₂, ZnO, SnO₂, and Related Compounds