Thermoluminescence characteristics of Bi12SiO20 single crystals

The research article “Thermoluminescence characteristics of Bi₁₂SiO₂₀ single crystals”, co-authored by METU member Prof. Nizami Hasanlı, has been published in Journal of Luminescence.

 Trapping center properties of bismuth silicon oxide (Bi₁₂SiO₂₀) single crystals were investigated by thermoluminescence (TL) measurements performed in the 50–400 °C temperature range. Experimental TL curve recorded at heating rate of 1 °C/s presented two overlapped peaks around 279 and 362 °C. The heating rate dependency of TL curve was also studied for heating rates between 1 and 6 ^°C/s. The measured TL curves were analyzed using curve fitting, initial rise and different heating rate methods. The results of analyses indicated that TL glow curve is composed by two peaks associated with two discrete trapping centers at 0.81 and 1.10 eV. The revealed trapping centers were associated with intrinsic defects in the Bi₁₂SiO₂₀ compound under the light of previously reported papers. An energy band diagram was also plotted to indicate possible transitions within the forbidden band gap.

Isik, M., Sarigul, N., & Gasanly, N. M. (2020). Thermoluminescence characteristics of Bi12SiO20 single crystals. Journal of Luminescence, 224 doi:10.1016/j.jlumin.2020.117280

Article access: https://www.sciencedirect.com/science/article/abs/pii/S0022231320303690?via%3Dihub

Keywords:

Bi₁₂SiO₂₀ (BSO); Sillenites; Thermoluminescence; Trap/defect properties

Other authors:
Isik M., & Sarigul N.

Acknowledgments:
This work was supported by ATILIM University under Grant No: ATÜ-ADP-1920-03 .