Novel transparent nanocomposite oxyfluoride materials for optical applications (2018 - 2021)

Project coordinator: Dr. Hab. Phys. Uldis Rogulis

Leading participant: Dr. Phys. Andris Antuzevics

Total cost: 300 000 EUR

Duration (years): 2018-2021

LZP FLPP No. LZP-2018/1-0335

The aim of this project is to develop and characterize nanostructured rare earth doped oxyfluoride glass ceramic materials tailored for highly efficient luminescence performance. In order to achieve the desired luminous properties such as high colour rendering index and quantum yield values of the emission as well as the repeatability required for practical applications it is planned employ structure sensitive X-ray diffraction and electron microscopy characterization techniques. State of art optical and magnetic resonance spectroscopy investigations at cryogenic temperatures are planned to determine the correlation of optical properties with activator local structure. The scientific novelty of this project is the emphasis on quantitative characterization of the studied materials which will advance the applicability of transparent glass ceramics for industrial use. The obtained results will be published in at least 3 articles in international journals with SNIP>1, one patent application and will serve as a foundation for future applied science project calls, including the EU Horizon program. The scope of this project contributes to Latvia’s priority direction in science “Technologies, materials and systems engineering for increased added value products and processes, and cybersecurity” and will advance the knowledge base in the smart specialization area of “Smart materials, technology and engineering systems” increasing the competitiveness of Latvian scientists in the world.


Project implementation (time period 03.09.2018. – 31.03.2020.)

Research results have been presented in 2 international conferences and in the form of 4 scientific publications, as well as in a public seminar. The main scientific achievements:

  • A literature survey of oxyfluoride glass ceramics investigations, where electron paramagnetic resonance spectroscopy technique is employed.

Antuzevics, A. (2019). EPR in glass ceramics. In Experimental Methods in the Physical Sciences (Vol. 50, pp. 161-190). Academic Press.

  • A novel method for a quantitative rare earth activator distribution assessment in glass ceramic nanocomposite materials.

Antuzevics, A., Krieke, G., Pavlovska, E., & Rogulis, U. (2019). Eu3+ ion distribution in oxyfluoride glass nanocomposites. Journal of Non-Crystalline Solids, 522, 119548.

  • Synthesis of glass ceramics containing hexagonal NaErF4 crystalline phase for the first time.

Krieke, G., Antuzevics, A., Springis, M., & Rogulis, U. (2019). Upconversion luminescence in transparent oxyfluoride glass ceramics containing hexagonal NaErF4. Journal of Alloys and Compounds, 798, 326-332.

  • Proposed mechanism of low temperature afterglow in BaY2F8 crystal.

Antuzevics, A., Fedotovs, A., Berzins, D., Rogulis, U., Auzins, K., Zolotarjovs, A., & Baldochi, S. L. (2020). Recombination luminescence of X-ray induced paramagnetic defects in BaY2F8. Journal of Luminescence, 117216.