Luminescence of Pr{sup 3+} Impurity Centers and Defects in Sr{sub 9}Sc (PO{sub 4}){sub 7}:Pr{sup 3+}

Journal Article · Wed May 15 04:00:00 EDT 2019 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783419050275· OSTI ID:22925285

Pustovarov, V. A.; Khatchenko, Yu. E.; Ivanov, V. Yu. ^[1]; Bettinelli, M. ^[2]; Shi, Q. ^[3]

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1. Ural Federal University (Russian Federation)
2. University of Verona and INSTM (Italy)
3. Taiyuan University of Technology (China)

The spectroscopic characteristics and luminescence decay kinetics of Sr{sub 9}Sc(PO{sub 4}){sub 7}:Pr{sup 3+}(1%) were investigated using synchrotron radiation of ultraviolet (UV), vacuum ultraviolet (VUV) and X-ray ranges, as well as pulsed cathodoluminescence (PCL) methods at temperatures of 10, 90, and 295 K. The luminescence spectra contain three groups of bands and lines. In the UV range, the observed bands correspond to interconfigurational 5d → 4f transitions in Pr{sup 3+} ions. In the visible spectrum, the wide luminescence band of defects dominates, as well as narrow lines associated with intraconfigurational 4f → 4f transitions in Pr{sup 3+} ions. When excited by an electron beam (5 Hz), the main component with a decay time τ ∼ 17 ns dominates in the decay kinetics of the 5d → 4f luminescence. The decay kinetics of 5d → 4f luminescence upon excitation with high-frequency (τ ∼ 8 MHz) synchrotron radiation of the X-ray range contains a fast component (τ ∼ 15 ns) against the background of the slow component of the μs-range. An effective nonradiative energy transfer is observed from impurity centers to defects, as well as from the host to Pr{sup 3+} ions and defects.

• OSTI ID: 22925285
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 5 Vol. 61; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATHODOLUMINESCENCE
DECAY
DEFECTS
ELECTRON BEAMS
ENERGY TRANSFER
EXCITATION
FAR ULTRAVIOLET RADIATION
IMPURITIES
MHZ RANGE
PHOSPHATES
PRASEODYMIUM IONS
PULSES
SYNCHROTRON RADIATION
VISIBLE SPECTRA
X RADIATION