Interconfiguration and intraconfiguration transitions of Pr<sup>3+</sup>in some oxides and flourides

Родный, П. А.; Eijk, C.W.E. van; Mishin, Alexander N.; Mikhrin, S. B.; Avanesov, A. G.; Потапов, А. С.

doi:10.1117/12.475331

Cited by 3 publications

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“…The wide-band intrinsic luminescence with a maximum near 300 nm may be attributed to excitonic emission. This emission is suppressed in the SrAl 12 O 19 samples containing 0.5 mol% of Pr 3+ [9]. The excitation spectra of the intrinsic luminescence of SrAl 12 O 19 :Pr (0.1%) are presented in figure 5.…”

Section: Resultsmentioning

confidence: 98%

“…The polycrystalline samples obtained were subjected to x-ray diffraction analysis, and only single-phase samples were used in further experiments. In fact we used the same set of the samples as in previous works [8,9], i.e., SrAl 12 O 19 containing 0.05, 0.1, 0.5, and 1.0% of Pr 3+ . The appropriate amount of Mg 2+ was introduced to the compounds on Al 3+ sites that act as charge compensation for Pr 3+ replacing Sr 2+ .…”

Section: Methodsmentioning

confidence: 99%

“…SrAl 12 O 19 :Pr has been investigated as a promising phosphor possessing cascade emission [6][7][8][9][10]. The first step of the cascade corresponds to 1 S 0 → 1 I 6 transitions of Pr 3+ ions, while the second step involves 3 P 0 → 3 H j , 3 F j transitions.…”

Section: Introductionmentioning

confidence: 99%

“…The first step of the cascade corresponds to 1 S 0 → 1 I 6 transitions of Pr 3+ ions, while the second step involves 3 P 0 → 3 H j , 3 F j transitions. The following properties of SrAl 12 O 19 :Pr have been studied: emission spectra [6,8,9], decay kinetics [6][7][8], the influence of temperature and Pr concentration on emission properties [8,9], the mixing of the 1 S 0 , 4f 2 state and some states of the 4f5d configuration of Pr 3+ ions [10]. The emission from the 3 P 0 level of Pr 3+ in SrAl 12 O 19 has been investigated in detail in [11].…”

Section: Introductionmentioning

confidence: 99%

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Emission of Pr³in SrAl₁₂O₁₉under vacuum ultraviolet synchrotron excitation

Родный

Dorenbos

Stryganyuk

et al. 2003

J. Phys.: Condens. Matter

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SrAl12O19:Pr phosphors have been investigated under ultraviolet/vacuum ultraviolet (5–20 eV) synchrotron radiation at room and near liquid He temperatures. The excitation of 1S 0 →1I 6 and 3P 0 →3H 4 emission of Pr3+ in SrAl12O19 occurs in a 1 eV wide region originating from the interconfiguration 4f2 → 4f5d transitions with threshold (onset of the transitions) at 6.0 eV at room temperature and at 6.15 eV at 14 K. A comparison of the excitation spectra of Pr3+ and known data for Ce3+ in SrAl12O19 reveals a shift of 1.52 eV between 5d states of the ions. The next threshold near 7.5 eV corresponds to the transitions from valence to conduction band. The luminescence from the 3P 0 level is excited efficiently at low temperature while 1S 0 luminescence is absent under band-to-band excitation. To explain this, a mechanism involving valence hole trapping and energy transfer from excitonic states to Pr3+ is proposed. At excitation near the maximum of 4f2 → 4f5d transitions (6.4 eV), the 1S 0 →1I 6 luminescence exhibits exponential decay with constant τ = 330 ± 10 ns at 300 K and τ ≈ 400 ns at 14 K. At pre-threshold excitation (E < 6.0 eV) a fast component τ ≈ 10 ns originating from excitonic emission prevails.

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Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%