Metal-to-metal charge transfer band position control and luminescence quenching by cationic substitution in NaNbO3:Pr3+

V. Castaing; L. Li; D. Rytz; Y. Katayama; A. D. Sontakke; S. Tanabe; M. Peng; B. Viana

doi:10.1117/12.2253177

16 February 2017 Metal-to-metal charge transfer band position control and luminescence quenching by cationic substitution in NaNbO₃:Pr³⁺

V. Castaing, L. Li, D. Rytz, Y. Katayama, A. D. Sontakke, S. Tanabe, M. Peng, B. Viana

Author Affiliations +

Proceedings Volume 10100, Optical Components and Materials XIV; 101000F (2017) https://doi.org/10.1117/12.2253177
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

The development of materials showing efficient red-emitting persistent luminescence is still an ongoing challenge. As it shows red emission, around 613 nm, Pr³⁺ remains a good candidate for such application. Indeed, the transition from its ¹D₂ excited state to its ³H₄ ground state is responsible of the red emission. In this paper the effect of Na substitution in NaNbO₃:Pr³⁺ by K or Li cations in term of Metal-to-Metal Charge Transfer (MMCT) band position and its possible effect on persistent luminescence properties were investigated. MMCT energy shows increasing tendency with increasing average distance between A site (A = Li, Na, K, Pr) of perovskite. The most intense (efficient) photoluminescence was observed under MMCT excitation in Li_0.03Na_0.97NbO₃:Pr³⁺. The relaxation pathways were discussed based on the configurational coordinate model.

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Citation Download Citation

V. Castaing, L. Li, D. Rytz, Y. Katayama, A. D. Sontakke, S. Tanabe, M. Peng, and B. Viana "Metal-to-metal charge transfer band position control and luminescence quenching by cationic substitution in NaNbO₃:Pr³⁺", Proc. SPIE 10100, Optical Components and Materials XIV, 101000F (16 February 2017); https://doi.org/10.1117/12.2253177

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