Textured Beta-Sialon:Eu2+ Phosphor Deposits Fabricated by Electrophoretic Deposition (EPD) Process within a Strong Magnetic Field: Preparation Process and Photoluminescence (PL) Properties Depending on Orientation

Chen Ning Zhang; Tetsuo Uchikoshi; Li Hong Liu; Benjamin Dierre; Yu Jin Cho; Yoshio Sakka; Naoto Hirosaki; Takashi Sekiguchi

doi:10.4028/www.scientific.net/KEM.654.268

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 654Textured Beta-Sialon:Eu2+ Phosphor Deposits...

Textured Beta-Sialon:Eu²⁺ Phosphor Deposits Fabricated by Electrophoretic Deposition (EPD) Process within a Strong Magnetic Field: Preparation Process and Photoluminescence (PL) Properties Depending on Orientation

Abstract:

Beta-sialon:Eu²⁺ phosphor deposits were fabricated by electrophoretic deposition (EPD) process within a strong magnetic field (12 T). The direction of the magnetic field was adjusted to be parallel or perpendicular to that of the electric field, that is, vertical-or horizontal setup. The oriented deposits were fabricated by aligning the β-sialon:Eu²⁺ particles along the higher magnetic-susceptibility c-crystal axis (a, b-crystal plane). For the case of vertically-setup magnetic field, the oriented deposit aligned along the c-axis possessed higher relative deposit density than the randomly fabricated deposit, as a result, varying the intensity ratio of emission and transmitted excitation, and therefore, presenting different chromaticity coordinates; for the case of horizontally-setup magnetic field, photoluminescence (PL) intensities of the deposits oriented along c-axis were significantly improved by comparing with those of the randomly-oriented ones.

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Periodical:

Key Engineering Materials (Volume 654)

Pages:

268-273

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.654.268

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Online since:

July 2015

Authors:

Chen Ning Zhang, Tetsuo Uchikoshi*, Li Hong Liu, Benjamin Dierre, Yu Jin Cho, Yoshio Sakka, Naoto Hirosaki, Takashi Sekiguchi

Keywords:

Beta-sialon:Eu²⁺, Electrophoretic Deposition (EPD), Orientation, Phosphor, Photoluminescence (PL), Strong Magnetic Field

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