Insight into Eu redox and Pr³⁺ 5d emission in KSrPO₄ by VRBE scheme construction

Insight into Eu redox and Pr³⁺ 5d emission in KSrPO₄ by VRBE scheme construction

Zhou, Rongfu (Sun Yat-sen University)
Lin, Litian (Sun Yat-sen University)
Liu, Chunmeng (Sun Yat-sen University)
Dorenbos, P. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Tao, Ye (Institute of High Energy Physics Chinese Academy of Science)
Huang, Yan (Institute of High Energy Physics Chinese Academy of Science)
Liang, Hongbin (Sun Yat-sen University)

2018

A series of Ln-doped KSrPO₄ (Ln = Ce³⁺, Eu³⁺, Eu²⁺, Pr³⁺) phosphors are prepared through a high-temperature solid-state method. The KSrPO₄ compound is confirmed to possess a β-K₂SO₄ structure with the Pnma group by Rietveld refinement, and the temperature-dependent lattice parameters are investigated with the powder X-ray diffraction results at different temperatures. Ce³⁺ and Eu³⁺ ions are introduced to probe the crystal field strength (CFS) and the lanthanide site symmetry by using VUV-UV-vis spectroscopy. The temperature-dependent luminescence properties of KSrPO₄: Ce³⁺/Eu²⁺ exhibit an excellent thermal stability of Ce³⁺/Eu²⁺ luminescence. Based on the VUV-UV-vis spectra of Ce³⁺ and Eu³⁺ doped KSrPO₄, the vacuum referred binding energy (VRBE) scheme is constructed to understand the redox properties of Eu, the 5d energy levels of Pr³⁺ and the thermal quenching characteristics of Ce³⁺ and Eu²⁺ luminescence.

http://resolver.tudelft.nl/uuid:0a1acd06-9e1c-4106-8cb1-5202cf2f8aa5

https://doi.org/10.1039/c7dt03813e

2019-01-02

1477-9226

Dalton Transactions: the international journal for inorganic, organometallic and bioinorganic chemistry, 47 (2), 306-313

Accepted Author Manuscript

Institutional Repository

journal article

© 2018 Rongfu Zhou, Litian Lin, Chunmeng Liu, P. Dorenbos, Ye Tao, Yan Huang, Hongbin Liang