1. Enhanced Emission of Tellurite Glass Doped with Pr 3+ /Ho 3+ and Their Applications.
- Author
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Burtan-Gwizdala, Bozena, Reben, Manuela, Cisowski, Jan, Lisiecki, Radosław, Jarząbek, Bożena, Alshehri, Ali, Hussein, Khalid I., and Yousef, El Sayed
- Subjects
GLASS ,RADIATION shielding ,RADIATION protection ,PHOTODYNAMIC therapy ,ENERGY transfer ,HOLMIUM - Abstract
The shielding and spectroscopic properties of Pr
+ 3 and Pr3+ /Ho3+ -codoped tellurite glass were investigated. The intensity parameters (Ω2 = 3.24-, Ω4 = 1.64-, Ω6 = 1.10 × 10−20 cm2 ) as well as the radiative lifetimes of3 F4 +5 S2 and5 I6 excited states of Ho3+ ions were equal to 301 μs and 3.0 μs, respectively. The former value appears to be much higher than that obtained from the lifetime measurement, indicating the presence of various energy transfer processes. The NIR spectrum of Pr3+ /Ho3+ -co-doped tellurite glass is dominated by strong Ho3+ :5 I6 emission at around 1200 nm, being the result of the energy transfer from Pr3+ to Ho3+ ions. The shielding effectiveness of the prepared glasses showed good performance against high-energy photons. These findings suggest that the prepared glasses could be used in laser technology such as photodynamic therapy (PDT) treatment procedures and as shielding for radiation protection. [ABSTRACT FROM AUTHOR]- Published
- 2023
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