Dispersion and Shape Control on Nanoparticles of Gd2O3:Eu3+ Red Phosphor Prepared by Template Method

Jeong Min Park; Se Min Ban; Kyeong-Youl Jung; Byung-Ki Choi; Kwang-Jung Kang; Dae-Sung Kim

doi:10.3740/MRSK.2017.27.10.534

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Dispersion and Shape Control on Nanoparticles of Gd₂O₃:Eu³⁺ Red Phosphor Prepared by Template Method 주형법으로 제조된 Gd₂O₃:Eu³⁺ 적색 형광체의 나노입자 분산 및 형상제어

October 2017. pp. 534-543

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Abstract

Gd₂O₃:Eu³⁺ red phosphors were prepared by template method from crystalline cellulose impregnated by metal salt. The crystallite size and photoluminescence(PL) property of Gd₂O₃:Eu³⁺ red phosphors were controlled by varying the calcination temperature and Eu³⁺ mol ratio. The nano dispersion of Gd₂O₃:Eu³⁺ was also conducted with a bead mill wet process. Dependent on the time of bead milling, Gd₂O₃:Eu³⁺ nanosol of around 100 nm (median particle size : D₅₀) was produced. As the bead milling process proceeded, the luminescent efficiency decreased due to the low crystallinity of the Gd₂O₃:Eu³⁺ nanoparticles. In spite of the low PL property of Gd₂O₃:Eu³⁺ nanosol, it was observed that the photoluminescent property was recovered after re-calcination. In addition, in the dispersed nanosol treated at 85 °C, a self assembly phenomenon between particles appeared, and the particles changed from spherical to rod-shaped. These results indicate that particle growth occurs due to mutual assembly of Gd(OH)₃ particles, which is the hydration of Gd₂O₃ particles, in aqueous solvent at 85 °C.

Keywords

Gd₂O₃:Eu³⁺

red phosphor

nanosol

photoluminescence

dispersion & shape.

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 27
No :10
Pages :534-543
Received Date : 2017-05-18
Revised Date : 2017-09-13
Accepted Date : 2017-09-14
DOI :https://doi.org/10.3740/MRSK.2017.27.10.534

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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