Site-Dependent Eu 3+ Photoluminescence in Double Perovskite-Type Alkaline Earth Lanthanum Tantalates

Kazushige Ueda (1) , Takuma Yoshino (1) , Yuhei Shimizu (2) , Tetsuo Honma (3) , Florian Massuyeau (4) , Stéphane Jobic (4)

1 Kyutech - Kyushu Institute of Technology
2 National Metrology Institute of Japan
3 JASRI - Japan Synchrotron Radiation Research Institute [Hyogo]
4 IMN - Institut des Matériaux Jean Rouxel

Highlights 1. Phase-pure Eu 3+ doped Ca2LaTaO6 (CLTO) and Ba2LaTaO6 (BLTO) were prepared. 2. Eu 3+ were confirmed to be at A sites in CLTO and B sites in BLTO by XANES analysis. 3. Eu 3+ site-dependent PL spectra were obtained using the Eu 3+-site-confirmed samples. 4. Site-dependent PL and the lifetime were examined systematically by CT excitation. 5. High external efficiency of 28% was found in the Eu 3+ doped BLTO double perovskite.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Kazushige Ueda, Takuma Yoshino, Yuhei Shimizu, Tetsuo Honma, Florian Massuyeau, et al.. Site-Dependent Eu 3+ Photoluminescence in Double Perovskite-Type Alkaline Earth Lanthanum Tantalates. Journal of Luminescence, 2021, 229, pp.117683. ⟨10.1016/j.jlumin.2020.117683⟩. ⟨hal-03052187⟩