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Solid-state synthesis and luminescent properties of Na+-co-doped Sr3ZnNb2O9:Eu3+ red phosphors

LIFANG CAI1, JIE ZHANG1, BING HAN1,*

Affiliation

  1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, People’s Republic of China

Abstract

A series of Eu3+ singly doped and Eu3+/Na+ codoped Sr3ZnNb2O9 phosphors were synthesized by the high-temperature solid-phase method. The phase structure and photoluminescent properties of the samples were systematically characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy analysis. Under 395 nm near-ultraviolet excitation, the Eu3+ singly doped phosphors exhibit characteristic red emissions of Eu3+, with the strongest emission peak at 615 nm (5D0→7F2). The luminescent intensity initially rises and subsequently declines as the Eu3+ doping concentration increases, and the concentration quenching effect emerges when x > 0.15. Upon co-doping with Na+ ions serving as charge compensators, the luminescent intensity of Sr3ZnNb2O9:Eu3+ phosphors is markedly enhanced. The CIE chromaticity coordinates of the optimal sample are (0.617, 0.372), which is close to the standard red light (0.670, 0.330). This study demonstrates that Na+ co-doping represents an effective strategy for enhancement of the luminescent performance of Sr3ZnNb2O9:Eu³⁺ phosphors, and the prepared phosphors have potential application prospects in near-ultraviolet excited white light-emitting diodes (WLEDs)..

Keywords

Sr3ZnNb2O9:Eu3+, Phosphor, Luminescent properties, WLEDs.

Submitted at: March 9, 2026
Accepted at: Oct. 5, 2026

Citation

LIFANG CAI, JIE ZHANG, BING HAN, Solid-state synthesis and luminescent properties of Na+-co-doped Sr3ZnNb2O9:Eu3+ red phosphors, Journal of Optoelectronics and Advanced Materials Vol. 28, Iss. 9-10, pp. 472-477 (2026)