Green emitting Tb doped LiBaB9O15 phosphors

A successful preparation of a Tb3+-doped LiBaB9O15 phosphors was achieved through the use of a solution-combustion method. The preparation of the powders of the Tb3+-doped LiBaB9O15 phosphor was confirmed by X-ray diffraction (XRD) results; furthermore, the size and morphology of these powders were further examined using a scanning electron microscope (SEM). A study of the luminescent proprieties under a UV excitation showed a dominant and strong green luminescent peak at 542 nm that is due to the d-f transition. When monitored at 542 nm, the excitation spectrum exhibited a broad band centered at 230 nm and several weak peaks in the wavelength range of 300-400 nm that are attributed to the f-d transitions and the intra-4f-4f transitions of the Tb3+ ions, respectively. The addition of the Tb3+ concentration greatly improved the photoluminescent properties of the present phosphors, and the Commission International de I'Eclairage (CIE) chromaticity coordinates are located in the green region. The present study suggests that the potential applications of the Tb3+-doped LiBaB9O15 phosphors might be in the lighting and display fields.