Complex oxides: Electron excitations and their relaxation

Mürk, V.; Namozov, B. R.; Yaroshevich, N.

doi:10.1016/1350-4487(95)00017-9

Cited by 30 publications

(11 citation statements)

References 7 publications

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“…This exciton peak was not observed for LuAP 4 or for isostructural YAP 6, 7 single crystals before. The shoulder in the absorption spectra calculated from reflectivity using Kramers–Kronig relations in the region of 8.1–8.3 eV was observed in 4, 7 and its temperature dependence was not determined. It was also treated as exciton and the low intensity of the exciton was connected with the low probability of its creation in favor of the electron–hole pair creation in LuAP 4.…”

Section: Resultsmentioning

confidence: 68%

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Exciton creation in LuAlO₃ single crystalline film

Kolobanov

Mikhaĭlin

Petrovnin

et al. 2006

Physica Status Solidi (b)

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Single crystalline films (SCF) of LuAP attract attention because of the perspective of its application as 2D screens for X‐ray registration with high spatial resolution. An intensive sharp reflectivity peak at the edge of the fundamental absorption region with maximum at 8.37 eV at 10 K was found for a series of LuAP SCF grown by liquid phase epitaxy on YAP substrate. The dependence of the peak maximum and profile on temperature demonstrates its exciton origin. The absorption spectrum was calculated from reflectivity using Kramers–Kronig relations; the bandgap value was determined for LuAP as Eg = 8.44 eV at 10 K. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Resultsmentioning

confidence: 68%

“…Reflectivity of the LuAP SC crystal in FAR was analyzed in 4. A low‐intensity shoulder was observed at the edge of FAR in LuAlO 3 as well as in the isostructural YAlO 3 6, 7 and it is connected with exciton creation. Nevertheless this assumption requires correct approvement.…”

Section: Introductionmentioning

confidence: 99%

Exciton creation in LuAlO₃ single crystalline film

Kolobanov

Mikhaĭlin

Petrovnin

et al. 2006

Physica Status Solidi (b)

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“…They suggested that the defect emission originates in the substitution defect of the yttrium ions in the site of aluminum ions called antisite defects (AD). Meanwhile, Kuznetsov et al [17], Mürk et al [18][19][20] and Kirm et al [21] brought an evidence of formation of a metastable trapped excitations. The authors showed that the near-UV band is splitted into a high-energy band with the center around 4.9 eV related to the self-trapped excitons (STE), and into a low-energy band with the center around 4.2 eV connected with the self-trapped holes (STH) probably at oxygen ions.…”

Section: Introductionmentioning

confidence: 98%

Effect of oxidation annealing on optical properties of YAG:Ce single crystals

2015

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“…A broad intrinsic emission at longer wavelength with decay time of sub-or microsecond range was assigned as originating from emission of excitons localised on Y Al and Lu Al anti-site defects or emission of anti-site defects themselves [11,12]. It is to be noted that the excitation spectra recorded for STE and defect-related emission in Y 3 Al 5 O 12 and Lu 3 Al 5 O 12 [10][11][12] have similar behaviour as the excitation spectra recorded for the short-and long-wavelength emission components of Ca 3 Sc 2 Si 3 O 12 (see Figs. 1 and 2).…”

Section: Structural Detailsmentioning

confidence: 99%

Optical spectroscopy of Ca3Sc2Si3O12, Ca3Y2Si3O12 and Ca3Lu2Si3O12 doped with Pr3+

Ivanovskikh

Meijerink

Piccinelli

et al. 2010

Journal of Luminescence

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a b s t r a c tThe silicates Ca 3 Sc 2 Si 3 O 12 , Ca 3 Y 2 Si 3 O 12 and Ca 3 Lu 2 Si 3 O 12 , both undoped and doped with Pr 3 + ions, have been synthesized by solid-state reaction at high temperature. The luminescence spectroscopy and the excited state dynamics of the materials have been studied upon VUV and X-ray excitation using synchrotron radiation. All doped samples have shown efficient 5d-4f emission upon direct VUV excitation of 5d levels, but only Ca 3 Sc 2 Si 3 O 12 :Pr 3 + shows luminescence upon interband VUV or X-ray excitation. The VUV excited emission spectra of Ca 3 Y 2 Si 3 O 12 :Pr 3 + and Ca 3 Lu 2 Si 3 O 12 :Pr 3 + show features attributed to emission from two distinct sites accommodating the Pr 3 + dopant. The decay kinetics of the Pr 3 + 5d-4f emission in Ca 3 Sc 2 Si 3 O 12 :Pr 3 + upon VUV excitation across the band gap are characterized by decay times in the range 25-28 ns with no significant rise after the excitation pulse. They appear to be faster upon X-ray irradiation than for VUV excitation. Weak afterglow components are attributed to defect luminescence.

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Complex oxides: Electron excitations and their relaxation

Cited by 30 publications

References 7 publications

Exciton creation in LuAlO₃ single crystalline film

Exciton creation in LuAlO₃ single crystalline film

Effect of oxidation annealing on optical properties of YAG:Ce single crystals

Optical spectroscopy of Ca3Sc2Si3O12, Ca3Y2Si3O12 and Ca3Lu2Si3O12 doped with Pr3+

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Complex oxides: Electron excitations and their relaxation

Cited by 30 publications

References 7 publications

Exciton creation in LuAlO3 single crystalline film

Exciton creation in LuAlO3 single crystalline film

Effect of oxidation annealing on optical properties of YAG:Ce single crystals

Optical spectroscopy of Ca3Sc2Si3O12, Ca3Y2Si3O12 and Ca3Lu2Si3O12 doped with Pr3+

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Exciton creation in LuAlO₃ single crystalline film

Exciton creation in LuAlO₃ single crystalline film