The influence of temperature-time annealing, fluxes and surface treatment of grains on the optical-luminescent properties of crystalline phosphorus Y2O2S:Eu

Tatiana S. Ponomaryova; Tatiana A. Akmaeva

doi:10.1117/12.2521536

3 June 2019 The influence of temperature-time annealing, fluxes and surface treatment of grains on the optical-luminescent properties of crystalline phosphorus Y2O2S:Eu

Tatiana S. Ponomaryova, Tatiana A. Akmaeva

Author Affiliations +

Proceedings Volume 11066, Saratov Fall Meeting 2018: Laser Physics, Photonic Technologies, and Molecular Modeling; 110661I (2019) https://doi.org/10.1117/12.2521536
Event: International Symposium on Optics and Biophotonics VI: Saratov Fall Meeting 2018, 2018, Saratov, Russian Federation

Abstract

In the present work discusses the factors affecting the brightness and intensity of the photoluminescence of the red phosphor glow based on yttrium oxysulfide activated by europium. The energy during cathode excitation is transferred from the surface of the grain to it is volume either due to the excitation of bulk plasmons (excitation 100 –400 V) or by the migration of minority charge carriers at low voltage (less than 100 V) excitation. With such mechanisms of energy transfer, the optimum grain size of phosphorus is about 1 micron. Therefore, surface treatment was carried out with modifying additives molybdate and ammonium tungstate grains of Y₂O₂S:Eu phosphors, which makes it possible to obtain powders with a spherical shape of grains not larger than 3-5 μm.

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Tatiana S. Ponomaryova and Tatiana A. Akmaeva "The influence of temperature-time annealing, fluxes and surface treatment of grains on the optical-luminescent properties of crystalline phosphorus Y2O2S:Eu ", Proc. SPIE 11066, Saratov Fall Meeting 2018: Laser Physics, Photonic Technologies, and Molecular Modeling, 110661I (3 June 2019); https://doi.org/10.1117/12.2521536

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KEYWORDS

Crystals

Annealing

Luminescence

Europium

Molybdenum

Phosphorus

Crystal optics

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