Abstract
A series of Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors were synthesized by a solid-state reaction method. The Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors exhibit superior thermal behavior to the corresponding Dy3+ singly doped and Eu3+ singly doped BaLa4Si3O13 phosphors. A remarkable enhancement of thermal stability is observed as the Eu3+ concentration increases. The emission intensity is enhanced by a factor of ∼1.1 at 423 K compared to that at 298 K for the 11 mol % Eu3+ doped sample. The improved thermal stability is ascribed to the enhanced energy transfer from Dy3+ to Eu3+ at high temperature, which enhances the Eu3+ emission and effectively compensates the thermal quenching-induced emission reduction. The synthesized phosphors can further be employed as optical thermometry materials, with the highest relative sensitivity (Sr) of 1.462% K-1 at 497 K. The results demonstrate that employing energy transfer is an effective strategy to design anti-thermal phosphors and the synthesized Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors show great potential as red phosphors for white-light-emitting diodes and optical temperature sensing applications.
| Original language | English |
|---|---|
| Pages (from-to) | 2931-2943 |
| Number of pages | 13 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 60 |
| Issue number | 7 |
| DOIs | |
| State | Published - Feb 24 2021 |
Funding
This work was supported by the Natural Science Foundation of Zhejiang Province, China (nos. LY18F050006 and LQ21A040003), Natural Science Foundation of Ningbo (grant nos. 2019A610057 and 2018A610040), The General Research Project of Department of Education for Zhejiang Province (Y201941319), and the K.C. Wong Magna Fund in Ningbo University.