Synthesis of green emission upconversion phosphor nanosheets (LaNb2O7) doped with Er3+ and Yb3+

Soichi Takasugi; Riku Iida; Koji Tomita; Michio Iwaoka; Kiyofumi Katagiri; Minoru Osada; Masato Kakihana

doi:10.1016/j.jlumin.2015.12.028

Synthesis of green emission upconversion phosphor nanosheets (LaNb₂O₇) doped with Er³⁺ and Yb³⁺

Soichi Takasugi, Riku Iida, Koji Tomita^*, Michio Iwaoka, Kiyofumi Katagiri, Minoru Osada, Masato Kakihana

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

LaNb₂O₇:Er³⁺,Yb³⁺ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb₂O₇:Er³⁺,Yb³⁺ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb₂O₇:Er³⁺,Yb³⁺. The UPC emission intensities of the nanosheets dispersed in different solvents (H₂O, D₂O, CH₃OH, CH₂Cl₂, and CCl₄) were measured, and the intensities were observed to decrease in the order CCl₄>CH₂Cl₂>D₂O>CH₃OH>H₂O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy.

Original language	English
Pages (from-to)	130-134
Number of pages	5
Journal	Journal of Luminescence
Volume	173
DOIs	https://doi.org/10.1016/j.jlumin.2015.12.028
Publication status	Published - 2016 May 1
Externally published	Yes

Keywords

Energy transfer
Inorganic nanosheet
Softbreakdown
Upconversionphosphor

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Chemistry(all)
Biochemistry
Biophysics

Access to Document

10.1016/j.jlumin.2015.12.028

Cite this

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title = "Synthesis of green emission upconversion phosphor nanosheets (LaNb2O7) doped with Er3+ and Yb3+ ",

abstract = "LaNb2O7:Er3+,Yb3+ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb2O7:Er3+,Yb3+ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb2O7:Er3+,Yb3+. The UPC emission intensities of the nanosheets dispersed in different solvents (H2O, D2O, CH3OH, CH2Cl2, and CCl4) were measured, and the intensities were observed to decrease in the order CCl4>CH2Cl2>D2O>CH3OH>H2O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy.",

keywords = "Energy transfer, Inorganic nanosheet, Softbreakdown, Upconversionphosphor",

author = "Soichi Takasugi and Riku Iida and Koji Tomita and Michio Iwaoka and Kiyofumi Katagiri and Minoru Osada and Masato Kakihana",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.jlumin.2015.12.028",

language = "English",

volume = "173",

pages = "130--134",

journal = "Journal of Luminescence",

issn = "0022-2313",

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T1 - Synthesis of green emission upconversion phosphor nanosheets (LaNb2O7) doped with Er3+ and Yb3+

AU - Takasugi, Soichi

AU - Iida, Riku

AU - Tomita, Koji

AU - Iwaoka, Michio

AU - Katagiri, Kiyofumi

AU - Osada, Minoru

AU - Kakihana, Masato

PY - 2016/5/1

Y1 - 2016/5/1

N2 - LaNb2O7:Er3+,Yb3+ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb2O7:Er3+,Yb3+ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb2O7:Er3+,Yb3+. The UPC emission intensities of the nanosheets dispersed in different solvents (H2O, D2O, CH3OH, CH2Cl2, and CCl4) were measured, and the intensities were observed to decrease in the order CCl4>CH2Cl2>D2O>CH3OH>H2O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy.

AB - LaNb2O7:Er3+,Yb3+ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb2O7:Er3+,Yb3+ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb2O7:Er3+,Yb3+. The UPC emission intensities of the nanosheets dispersed in different solvents (H2O, D2O, CH3OH, CH2Cl2, and CCl4) were measured, and the intensities were observed to decrease in the order CCl4>CH2Cl2>D2O>CH3OH>H2O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy.

KW - Energy transfer

KW - Inorganic nanosheet

KW - Softbreakdown

KW - Upconversionphosphor

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