Determination of the crystal structure and photoluminescence properties of NaEu1-xGdx(MoO4)2 phosphor synthesized by a water-assisted low-temperature synthesis technique

Takuya Hasegawa; Sun Woog Kim; Yusuke Abe; Masaru Muto; Mizuki Watanabe; Tatsuro Kaneko; Kazuyoshi Uematsu; Tadashi Ishigaki; Kenji Toda; Mineo Sato; Junko Koide; Masako Toda; Yoshiaki Kudo

doi:10.1039/c7ra01832k

Determination of the crystal structure and photoluminescence properties of NaEu_1-xGd_x(MoO₄)₂ phosphor synthesized by a water-assisted low-temperature synthesis technique

Takuya Hasegawa, Sun Woog Kim, Yusuke Abe, Masaru Muto, Mizuki Watanabe, Tatsuro Kaneko, Kazuyoshi Uematsu, Tadashi Ishigaki, Kenji Toda, Mineo Sato, Junko Koide, Masako Toda, Yoshiaki Kudo

IMRAM - Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A single-phase red-emitting NaEu(MoO₄)₂ phosphor with nanosized particles was synthesized using a water-assisted solid state reaction (WASSR) method, a new low-temperature synthesis method developed by our group. NaEu(MoO₄)₂ exhibits a monoclinic structure with a space group C2/c (no. 15), which is composed of a Na/EuO₈ dodecahedron with the site occupancy of Na/Eu = 1 : 1 and an MoO₄ tetrahedron. To enhance the emission intensity of the NaEu(MoO₄)₂ phosphor, Gd³⁺ was doped into the Eu³⁺ sites and NaEu_1-xGd_x(MoO₄)₂ (0 < x ≤ 0.50) samples were synthesized using the WASSR method. The emission intensity of the phosphors was successfully enhanced by increasing the Gd³⁺ content in the samples with 0 ≤ x ≤ 0.30, but was reduced with x > 0.30. This indicates that the optimum composition of the phosphor for achieving a high emission intensity that is ∼3.8 times higher than that of the NaEu(MoO₄)₂ (x = 0) phosphor is NaEu_0.70Gd_0.30(MoO₄)₂. These phosphors exhibit a granular particle morphology with the particle size of the phosphor being ∼200 nm.

Original language	English
Pages (from-to)	25089-25094
Number of pages	6
Journal	RSC Advances
Volume	7
Issue number	40
DOIs	https://doi.org/10.1039/c7ra01832k
Publication status	Published - 2017

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Hasegawa, T., Kim, S. W., Abe, Y., Muto, M., Watanabe, M., Kaneko, T., Uematsu, K., Ishigaki, T., Toda, K., Sato, M., Koide, J., Toda, M., & Kudo, Y. (2017). Determination of the crystal structure and photoluminescence properties of NaEu_1-xGd_x(MoO₄)₂ phosphor synthesized by a water-assisted low-temperature synthesis technique. RSC Advances, 7(40), 25089-25094. https://doi.org/10.1039/c7ra01832k

@article{7b2a9ceebfa34c7f96e750a61ee66231,

title = "Determination of the crystal structure and photoluminescence properties of NaEu1-xGdx(MoO4)2 phosphor synthesized by a water-assisted low-temperature synthesis technique",

abstract = "A single-phase red-emitting NaEu(MoO4)2 phosphor with nanosized particles was synthesized using a water-assisted solid state reaction (WASSR) method, a new low-temperature synthesis method developed by our group. NaEu(MoO4)2 exhibits a monoclinic structure with a space group C2/c (no. 15), which is composed of a Na/EuO8 dodecahedron with the site occupancy of Na/Eu = 1 : 1 and an MoO4 tetrahedron. To enhance the emission intensity of the NaEu(MoO4)2 phosphor, Gd3+ was doped into the Eu3+ sites and NaEu1-xGdx(MoO4)2 (0 < x ≤ 0.50) samples were synthesized using the WASSR method. The emission intensity of the phosphors was successfully enhanced by increasing the Gd3+ content in the samples with 0 ≤ x ≤ 0.30, but was reduced with x > 0.30. This indicates that the optimum composition of the phosphor for achieving a high emission intensity that is ∼3.8 times higher than that of the NaEu(MoO4)2 (x = 0) phosphor is NaEu0.70Gd0.30(MoO4)2. These phosphors exhibit a granular particle morphology with the particle size of the phosphor being ∼200 nm.",

author = "Takuya Hasegawa and Kim, {Sun Woog} and Yusuke Abe and Masaru Muto and Mizuki Watanabe and Tatsuro Kaneko and Kazuyoshi Uematsu and Tadashi Ishigaki and Kenji Toda and Mineo Sato and Junko Koide and Masako Toda and Yoshiaki Kudo",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7ra01832k",

language = "English",

volume = "7",

pages = "25089--25094",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

number = "40",

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Hasegawa, T, Kim, SW, Abe, Y, Muto, M, Watanabe, M, Kaneko, T, Uematsu, K, Ishigaki, T, Toda, K, Sato, M, Koide, J, Toda, M & Kudo, Y 2017, 'Determination of the crystal structure and photoluminescence properties of NaEu_1-xGd_x(MoO₄)₂ phosphor synthesized by a water-assisted low-temperature synthesis technique', RSC Advances, vol. 7, no. 40, pp. 25089-25094. https://doi.org/10.1039/c7ra01832k

TY - JOUR

T1 - Determination of the crystal structure and photoluminescence properties of NaEu1-xGdx(MoO4)2 phosphor synthesized by a water-assisted low-temperature synthesis technique

AU - Hasegawa, Takuya

AU - Kim, Sun Woog

AU - Abe, Yusuke

AU - Muto, Masaru

AU - Watanabe, Mizuki

AU - Kaneko, Tatsuro

AU - Uematsu, Kazuyoshi

AU - Ishigaki, Tadashi

AU - Toda, Kenji

AU - Sato, Mineo

AU - Koide, Junko

AU - Toda, Masako

AU - Kudo, Yoshiaki

PY - 2017

Y1 - 2017

N2 - A single-phase red-emitting NaEu(MoO4)2 phosphor with nanosized particles was synthesized using a water-assisted solid state reaction (WASSR) method, a new low-temperature synthesis method developed by our group. NaEu(MoO4)2 exhibits a monoclinic structure with a space group C2/c (no. 15), which is composed of a Na/EuO8 dodecahedron with the site occupancy of Na/Eu = 1 : 1 and an MoO4 tetrahedron. To enhance the emission intensity of the NaEu(MoO4)2 phosphor, Gd3+ was doped into the Eu3+ sites and NaEu1-xGdx(MoO4)2 (0 < x ≤ 0.50) samples were synthesized using the WASSR method. The emission intensity of the phosphors was successfully enhanced by increasing the Gd3+ content in the samples with 0 ≤ x ≤ 0.30, but was reduced with x > 0.30. This indicates that the optimum composition of the phosphor for achieving a high emission intensity that is ∼3.8 times higher than that of the NaEu(MoO4)2 (x = 0) phosphor is NaEu0.70Gd0.30(MoO4)2. These phosphors exhibit a granular particle morphology with the particle size of the phosphor being ∼200 nm.

AB - A single-phase red-emitting NaEu(MoO4)2 phosphor with nanosized particles was synthesized using a water-assisted solid state reaction (WASSR) method, a new low-temperature synthesis method developed by our group. NaEu(MoO4)2 exhibits a monoclinic structure with a space group C2/c (no. 15), which is composed of a Na/EuO8 dodecahedron with the site occupancy of Na/Eu = 1 : 1 and an MoO4 tetrahedron. To enhance the emission intensity of the NaEu(MoO4)2 phosphor, Gd3+ was doped into the Eu3+ sites and NaEu1-xGdx(MoO4)2 (0 < x ≤ 0.50) samples were synthesized using the WASSR method. The emission intensity of the phosphors was successfully enhanced by increasing the Gd3+ content in the samples with 0 ≤ x ≤ 0.30, but was reduced with x > 0.30. This indicates that the optimum composition of the phosphor for achieving a high emission intensity that is ∼3.8 times higher than that of the NaEu(MoO4)2 (x = 0) phosphor is NaEu0.70Gd0.30(MoO4)2. These phosphors exhibit a granular particle morphology with the particle size of the phosphor being ∼200 nm.

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UR - http://www.scopus.com/inward/citedby.url?scp=85021771406&partnerID=8YFLogxK

U2 - 10.1039/c7ra01832k

DO - 10.1039/c7ra01832k

M3 - Article

AN - SCOPUS:85021771406

SN - 2046-2069

VL - 7

SP - 25089

EP - 25094

JO - RSC Advances

JF - RSC Advances

IS - 40

ER -

Determination of the crystal structure and photoluminescence properties of NaEu_1-xGd_x(MoO₄)₂ phosphor synthesized by a water-assisted low-temperature synthesis technique

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