Heat treatments of Gd2O2S:Tb, Y2O2S:Tb phosphors

Boris V. Mikhitaryan; Oshir Y. Manashirov; Sergey B. Mikhrin

doi:10.1117/12.726754

10 April 2007 Heat treatments of Gd₂O₂S:Tb, Y₂O₂S:Tb phosphors

Boris V. Mikhitaryan, Oshir Y. Manashirov, Sergey B. Mikhrin

Proceedings Volume 6597, Nanodesign, Technology, and Computer Simulations; 65970K (2007) https://doi.org/10.1117/12.726754
Event: Nanodesign, Technology, and Computer Simulations, 2006, Olsztyn, Poland

Abstract

It's well known, that some heat treatments improve significantly the light yield of Gd₂O₂S:Tb, Y₂0₂S:Tb phosphors, but processes ofthe energy transfer at excitations need further investigations. We present the new results ofthe synthesis and heat treatments optimization of oxysulfide phosphors. The heat treatments curried out at different ambient atmospheres in temperature range 200-1000°C. To measure kinetic properties of defects formations/annealing at heat treatments we measured the dependencies ofrelative defect concentrations on the duration of isothermal annealing. The investigation of bulk and surface defects in phosphors before and after heat treatments carried out at different excitation with different methods: spectra measurements with direct Tb³⁺ center excitation (4.9 eV UV excitation), spectra measurements with above gap excitation (X-ray; 1 kV and 10 kV electrons, 8.4 eV VUV excitation), thermo-stimulated luminescence measurements. The results of investigations allow us to increase the light yield of phosphors (20% increase in comparison with commercial samples).

Citation Download Citation

Boris V. Mikhitaryan, Oshir Y. Manashirov, and Sergey B. Mikhrin "Heat treatments of Gd₂O₂S:Tb, Y₂O₂S:Tb phosphors", Proc. SPIE 6597, Nanodesign, Technology, and Computer Simulations, 65970K (10 April 2007); https://doi.org/10.1117/12.726754

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available