Abstract
A highly Eu 3+-doped, highly crystalline CaTiO 3 phosphor was prepared via a solid-state (SS) method, and its structure was confirmed by X-ray diffraction (XRD). Photoluminescence (PL) data showed that this phosphor was efficiently excited by near-ultraviolet (NUV) light at wavelength around 400 nm and emitted intense red light with a broad peak around 618 nm corresponding to the 5D 0 → 7F 2 transition of Eu 3+. The relative emission intensity increased with increasing Eu 3+ concentration up to 28 mol%, which is extremely high in this field, then decreased due to concentration quenching. The concentration quenching and thermal quenching of the samples are discussed. By optimizing the calcination temperature and Eu 3+ concentration, it was shown that CaTiO 3:Eu 3+ is a promising red phosphor under near ultraviolet excitation for various applications.
Published Version
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