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Preparation and photoluminescence properties of LaGaO3:0.05Tb3+ green phosphors



  1. School of Materials Engineering, Xi’an Aeronautical University, Xi’an 710077, China


LaGaO3:0.05Tb3+ green phosphors were prepared via high-temperature solid-phase calcination at a temperature of 1300 ℃ for 4 h in a reducing environment. The crystalline structure, microscopic morphology and luminescence of the phosphor samples were characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM) and fluorescence spectrometer (PL), respectively, alongside a deployment of color coordinate calculation software (CIE). The results showed that the LaGaO3:0.05Tb3+ green phosphors were pure in terms of phase composition and had complete crystalline structure with regular morphology and uniform particle distribution. The photoluminescence process involved the 4f→5d→4f energy level transition of Tb3+, in which the excitation peak was located at 378 nm and the emission peak was found at 545 nm. The color coordinate of the LaGaO3:0.05Tb3+ phosphor was determined as (0.3481, 0.4228), which corresponded to the emission of relatively pure green light. Finally, the self-made LaGaO3:0.05Tb3+ green phosphors along with commercially available red and blue phosphors were employed as the raw materials for assembling a LED device, which exhibited excellent white light emission performance..


LaGaO3:0.05Tb3+, Green phosphors, WLED, Luminescence.

Submitted at: Sept. 22, 2022
Accepted at: Nov. 24, 2023


ZHAO LI, YUN-ZHENG WANG, HONG-BO JI, KUN-YAO WU, Preparation and photoluminescence properties of LaGaO3:0.05Tb3+ green phosphors, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 11-12, pp. 586-593 (2023)