Effect of low-density polyethylene on the luminescent properties of thulium-doped yttrium oxide obtained by the polyol technique
Abstract
In the present work polyethylene is used as a support of yttrium oxide particles doped with thulium atoms and its effect on the luminescent properties is studied. Thulium-doped yttrium oxide was prepared through the polyol method, different values of thulium are explored: 0, 0.5, 1, 1.5, 2.5 and 3.5 at%, as well as different calcinating temperatures: 400, 600, 800 and 1000 °C, are explored in order to determine the synthesis conditions needed for the maximum emission intensity, whose values were 1.5 at% of thulium and 1000 °C. The synthesized powder is dispersed in low-density polyethylene and dispersed as a thin film on glass substrates. The luminescent excitation and emission spectra showed important changes attributed to the influence of the -CH2- chain vibration; in addition, the presence of the polymer had an important influence on the emission decay time: while the powder showed a single emission process with a time of 9.293 μs, the film showed a two decay process with 1.156 μs and 4.086 μs, each.
- Publication:
-
Materials Research Express
- Pub Date:
- March 2020
- DOI:
- 10.1088/2053-1591/ab6fad
- Bibcode:
- 2020MRE.....7c6408A
- Keywords:
-
- polyethylene;
- thulium;
- yttrium oxide;
- luminescence;
- luminescent polymers