Spectral Characteristics and Thermal Quenching of Luminescence in Rb{sub 0.993}Pr{sub 0.007}Pb{sub 2}Br{sub 5} and Rb{sub 0.993}Pr{sub 0.007}Pb{sub 2}Cl{sub 2.5}Br{sub 2.5} Crystals

Journal Article · Sun Jul 15 04:00:00 EDT 2018 · Inorganic Materials

DOI:https://doi.org/10.1134/S0020168518070038· OSTI ID:22788056

Crystals with the compositions Rb{sub 0.993}Pr{sub 0.007}Pb{sub 2}Br{sub 5} and Rb{sub 0.993}Pr{sub 0.007}Pb{sub 2}Cl{sub 2.5}Br{sub 2.5} have been grown by the Bridgman method, and the absorption, luminescence excitation, and photoluminescence spectra of these materials in the case of the Stokes mechanism of optical excitation in the blue spectral region have been analyzed. The intensity of the visible luminescence bands of the Pr{sup 3+} praseodymium ions has been shown to depend on the nature of the nearest neighbor atoms in their crystalline environment. This effect is tentatively attributed to changes in the probability of radiative transitions in the rare-earth ion. The temperature dependences of emission intensity obtained for the crystals demonstrate that the contributions of nonradiative recombination channels depend on the transition, which also leads to changes in the emission color of the compounds.

• OSTI ID: 22788056
• Journal Information: Inorganic Materials, Journal Name: Inorganic Materials Journal Issue: 7 Vol. 54; ISSN INOMAF; ISSN 0020-1685
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BRIDGMAN METHOD
COLOR
CRYSTAL GROWTH
CRYSTALS
EXCITATION
PHOTOLUMINESCENCE
PRASEODYMIUM IONS
QUENCHING
RECOMBINATION
SPECTRA
TEMPERATURE DEPENDENCE