Luminescence of impurity Ce{sup 3+} centers in KH{sub 2}PO{sub 4} : Ce crystals

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418010201· OSTI ID:22771497

Ogorodnikov, I. N. ^[1]; Omel’kov, S. I. ^[2]

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1. Ural Federal University (Russian Federation)
2. University of Tartu, Institute of Physics (Estonia)

The photoluminescence, X-ray luminescence, and cathodoluminescence spectra of KH{sub 2}PO{sub 4} : Ce single crystals contain a nonelementary band of radiation with an energy of 3.55 eV and decay time of 27–33 ns. It is formed by fast radiative interconfiguration d → f transitions between the excited and ground states of Ce{sup 3+} ions, with the ground state is split by a crystalline field. In the range of concentrations studied (0.5–3 × 10{sup –2} wt %), Ce3+ ions enter the KH{sub 2}PO{sub 4} : Ce crystal lattice as substitution ions. Local charge compensation takes place by means of defects in the crystal structure that cause luminescence with a large Stokes shift in the region of 2.4–2.2 eV. The presence of hydrogen sublattice defects decreases the efficiency of energy transport by free charge carriers to the luminescent centers. The interaction of defects and impurity centers manifests itself as a slow inertial building-up of the stationary X-ray luminescence yield of Ce{sup 3+} centers.

• OSTI ID: 22771497
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 1 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATHODOLUMINESCENCE
CERIUM ADDITIONS
CHARGE CARRIERS
CONCENTRATION RATIO
CRYSTAL LATTICES
DEFECTS
EFFICIENCY
GROUND STATES
HYDROGEN
IMPURITIES
INTERACTIONS
MONOCRYSTALS
PHOTOLUMINESCENCE
POTASSIUM PHOSPHATES
POWER TRANSMISSION
SPECTRA
X RADIATION