학술논문
A novel orange emissive phosphor LaPO4 :Bi, Sm with sharp and splitting emission peaks of Sm3+ .
Document Type
Article
Author
Source
Subject
*PHOSPHORS
*LANTHANUM
*BISMUTH
*POLYCRYSTALS
*LIGHT emitting diodes
*CRYSTAL structure
*X-ray diffraction
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Language
ISSN
0167-577X
Abstract
Abstract: Bi3+, Sm3+ co-doped La0.99−x Bi x Sm0.01PO4 polycrystalline samples were synthesized by calcining precursors at 800°C in air. The precursors were obtained via low-heating temperature solid-state reactions. Crystal structures of the phosphor were examined with XRD and a pure phase was confirmed. The excitation spectra show that the phosphor can be efficiently excited by near-ultraviolet light, and the optimized concentration of Bi3+ is 0.9mol%. Three sharp, strong, and splitting emission peaks are located at 562, 596, and 642nm, corresponding to CIE (Commission International de l׳Eclairage) chromaticity coordinates x=0.42 and y=0.39, which indicate the orange light emitting property. So, the phosphor is promising in UV-LED chip-based white light-emitting diodes. [Copyright &y& Elsevier]