Original Article

Effect of Tb₂O₃ on mixed alkali borotellurie glass for enhanced green emission and scintillation efficiency

¹ School of Physics and Electrical Energy Engineering, Chuxiong Normal University, Chuxiong 675000, P.R. China
² Department of Physics, Abdul Wali Khan University, Mardan 23200, Pakistan
³ Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P. O. Box 84428, Riyadh 11671, Saudi Arabia
⁴ Department of Industrial Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
⁵ Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
⁶ A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov str., Kazan 420088, Russian Federation
⁷ Aleksander Butlerov Institute of Chemistry, Kazan Federal University, 1/29 Lobachevskogo str., Kazan 420008, Russian Federation
⁸ School of Energy & Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, P.R. China
⁹ Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom 73000, Thailand
¹⁰ Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

^* e-mail: Inamullah.k1983@gmail.com

Received: 4 May 2024
Accepted: 28 January 2025
Published online: 18 February 2025

Abstract

Present work aims to determine the effect of Tb₂O₃ in mixed alkali borotellurie glass. The glass was characterized by different techniques. The increase in the density is accredited to the replacement of Te (158.9 amu) by Tb-ions (127.4 amu). Four absorption transition were observed and assigned as ⁵D₄ (486 nm), ⁷F₁ ( 1895 nm), ⁷F₂ (1953 nm) and ⁷F₃ (2234 nm). The band-gap lies in the 2.87–2.63 eV range. Emission spectra has four intense transition at 486, 545, 590 and 620 nm due to transition from ⁵D₄-level to the ⁷F_J-level (where, J =6, 5, 4, 3) and three weak emission transition from ⁵D₄-state to the ⁷F_J (J = 0, 1 and 2) lower levels. Integral scintillation efficiency of LNBT-Tb4 glass found to be 4.701% of BGO (Bi₄Ge₃O₁₂) single crystal scintillator. It is observed that the lifetime of ⁵D₄ state of the Tb³⁺-ions decreases for LNBT-Tb5 glass with increasing Tb₂O₃ (1.5 mol%) concentration. The CIE-coordinates value for LNBT are x = 0.30, y = 0.61 and fall in yellowish green region of CIE-diagram. The CCT value for LNBT is 5989K. These results suggest the potential of prepared glass sample for green LEDs and emission display devices.