2004
DOI: 10.1002/chin.200417017
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Experimental and Theoretical Characterization of the Optical Properties of CeO2, SrCeO3, and Sr2CeO4 Containing Ce4+ (f0) Ions.

Abstract: 0 ) Ions. -The title compounds are characterized by UV/VIS diffuse reflectance measurements, electron energy loss spectroscopy, and DFT calculations. From the measured and calculated values of the refractive indices, the extinction coefficients, and the imaginary parts of the dielectric functions of the compounds it is concluded that only CeO 2 presents a proper absorption edge for an UV absorber, whereas SrCeO 3 and Sr 2 CeO 4 are unsuitable for UV absorption applications. -(GOUBIN, F.; ROCQUEFELTE, X.; WHANG… Show more

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Cited by 16 publications
(37 citation statements)
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“…Specifically, E g increases practically linearly under compressive biaxial strain, reaching a maximum value of 3.4 eV at η = −7%. According to our DFT calculations the band gap of unstrained CeO 2 is 3.1 eV, which compares very well with the experimental value of 3.2 eV [38], hence a maximum relative E g increase of 10% is achieved. Under tensile biaxial strain, E g also varies significantly although not in a regular manner.…”
Section: A Fluorite Ceo2 (111)supporting
confidence: 87%
“…Specifically, E g increases practically linearly under compressive biaxial strain, reaching a maximum value of 3.4 eV at η = −7%. According to our DFT calculations the band gap of unstrained CeO 2 is 3.1 eV, which compares very well with the experimental value of 3.2 eV [38], hence a maximum relative E g increase of 10% is achieved. Under tensile biaxial strain, E g also varies significantly although not in a regular manner.…”
Section: A Fluorite Ceo2 (111)supporting
confidence: 87%
“…The energy bandgap of E G 3.2 eV and the refractive index n 2.35 have been obtained in Ref. [27] and in Ref. [45], respectively.…”
Section: Ceomentioning
confidence: 89%
“…Thus, strictly speaking, the validity of the determined optical properties here would be for energies above the visible, but this procedure was applied in references used for the comparison of our results (Ref. [27], for instance).…”
Section: Data Analysis Proceduresmentioning
confidence: 99%
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“…Ce 4+ , on the other hand, shows strong charge transfer excitation in the near‐ultraviolet (UV)/violet region, but seldom any luminescence, Sr 2 CeO 4 being noted as an exception (10,11). In fact Ce 4+ compounds can be used as efficient filters for the UVA and UVB regions (12). We have studied the decomposition products of Ce(SO 4 ) 2 .4H 2 O using the photoluminescence techniques, with the view to answering the question of whether cerous salts are formed at any stage during such decomposition.…”
Section: Introductionmentioning
confidence: 99%