التفاصيل البيبلوغرافية
| العنوان: |
Color-tunable luminescence and temperature sensing properties of Bi3+/Sm3+ or Bi3+/Eu3+ codoped Ba2Gd2Ge4O13 phosphors. |
| المؤلفون: |
Lipina, Olga A., Chvanova, Anastasia V., Surat, Ludmila L., Baklanova, Yana V., Chufarov, Alexander Yu., Tyutyunnik, Alexander P., Zubkov, Vladimir G. |
| المصدر: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 5/14/2024, Vol. 53 Issue 18, p7985-7995, 11p |
| مصطلحات موضوعية: |
SAMARIUM, LUMINESCENCE, PHOSPHORS, SPACE groups, CRYSTAL lattices, TEMPERATURE measurements |
| مستخلص: |
Novel temperature-sensitive luminescent materials, Ba2Gd2Ge4O13 doped with Bi3+, Bi3+/Sm3+ or Bi3+/Eu3+ ions, have been prepared using a conventional solid-state reaction technique. The XRPD study has verified that all the synthesized germanates crystallize in the monoclinic system (space group C2/c, Z = 4). The crystal lattice of the compounds consists of zigzag chains of edge-sharing Me2O7 (Me = Bi3+, Eu3+ or Sm3+) dimers, [Ge4O13] units, and ten-coordinated Ba atoms. Under UV excitation the powders exhibit the luminescence corresponding to the 3P1 → 1S0 (310–550 nm) transition in Bi3+ and 4G5/2 → 6HJ (550–730 nm) in Sm3+ or 5D0 → 7FJ (570–720 nm) transitions in Eu3+ ions. Heating of Ba2Gd1.94Bi0.01Sm0.05Ge4O13 and Ba2Gd1.89Bi0.01Eu0.1Ge4O13 phosphors leads to an irregular decrease in the intensity of the main emission lines. It has been found that the fluorescence intensity ratio between a wide band in the 310–530 nm region and peaks at longer wavelengths may be successfully used as a temperature-dependent characteristic. Absolute/relative sensitivity values for Ba2Gd1.94Bi0.01Sm0.05Ge4O13 and Ba2Gd1.89Bi0.01Eu0.1Ge4O13 germanates reach 0.19% K−1/0.80% K−1 and 2.21% K−1/0.58% K−1, respectively. The above parameters indicate that Ba2Gd2Ge4O13:Bi3+/Sm3+ or Bi3+/Eu3+ samples can be used as potential luminescent materials for non-contact temperature measurement. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |