Low-temperature wet chemical synthesis and photoluminescence properties of YVO4

Bi3+, Eu3+ nanophosphors

Satoru Takeshita, Tetsuhiko Isobe, Seiji Niikura

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

YVO4: Bi3+, Eu3+nanophosphors are prepared by the citrate-assisted low-temperature wet chemical synthesis. When the colloidal solution is aged at 60 °C, the crystalline YVO4: Bi3+, Eu3+ nanorods are formed from the amorphous gel precursors, as confirmed by transmission electron microscopy and X-ray diffractometry (XRD). YVO4: Bi3+, Eu3+ nanophosphors emit red through energy transfer from Bi3+ to Eu3+ under near-UV-light excitation. The emission intensity increases with increasing the fraction of the crystalline phase during aging. The excitation peak corresponding to Bi3+-V5+ charge transfer relative to those of O2--V5+ and O2--Eu3+ charge transfers gradually becomes strong until the completion of the crystallization, although the contents of individual Bi3+ and Eu3+ ions incorporated into YVO4 keep constant. When the aging is continued after the completion of the crystallization, the content of incorporated Bi3+ gradually increases, and hence the emission intensity decreases as a result of the energy migration among Bi3+ ions. These results suggest that in addition to the fraction of the crystalline phase and the contents of incorporated Bi3+ and Eu3+ ions, the local chemical states around Bi3+ play significant roles in photoluminescence properties.

Original languageEnglish
Pages (from-to)1515-1522
Number of pages8
JournalJournal of Luminescence
Volume128
Issue number9
DOIs
Publication statusPublished - 2008 Sep

Fingerprint

Photoluminescence
Ions
Crystallization
Crystalline materials
photoluminescence
Temperature
Charge transfer
synthesis
Aging of materials
charge transfer
crystallization
Nanotubes
ions
Energy Transfer
citrates
Ultraviolet Rays
Nanorods
Transmission Electron Microscopy
Citric Acid
Ultraviolet radiation

Keywords

  • Eu
  • Nanophosphor
  • Photoluminescence
  • Wet chemical synthesis
  • YVO: Bi

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Low-temperature wet chemical synthesis and photoluminescence properties of YVO4 : Bi3+, Eu3+ nanophosphors. / Takeshita, Satoru; Isobe, Tetsuhiko; Niikura, Seiji.

In: Journal of Luminescence, Vol. 128, No. 9, 09.2008, p. 1515-1522.

Research output: Contribution to journalArticle

@article{718d8955adbf45158e4b9fc6af64682e,
title = "Low-temperature wet chemical synthesis and photoluminescence properties of YVO4: Bi3+, Eu3+ nanophosphors",
abstract = "YVO4: Bi3+, Eu3+nanophosphors are prepared by the citrate-assisted low-temperature wet chemical synthesis. When the colloidal solution is aged at 60 °C, the crystalline YVO4: Bi3+, Eu3+ nanorods are formed from the amorphous gel precursors, as confirmed by transmission electron microscopy and X-ray diffractometry (XRD). YVO4: Bi3+, Eu3+ nanophosphors emit red through energy transfer from Bi3+ to Eu3+ under near-UV-light excitation. The emission intensity increases with increasing the fraction of the crystalline phase during aging. The excitation peak corresponding to Bi3+-V5+ charge transfer relative to those of O2--V5+ and O2--Eu3+ charge transfers gradually becomes strong until the completion of the crystallization, although the contents of individual Bi3+ and Eu3+ ions incorporated into YVO4 keep constant. When the aging is continued after the completion of the crystallization, the content of incorporated Bi3+ gradually increases, and hence the emission intensity decreases as a result of the energy migration among Bi3+ ions. These results suggest that in addition to the fraction of the crystalline phase and the contents of incorporated Bi3+ and Eu3+ ions, the local chemical states around Bi3+ play significant roles in photoluminescence properties.",
keywords = "Eu, Nanophosphor, Photoluminescence, Wet chemical synthesis, YVO: Bi",
author = "Satoru Takeshita and Tetsuhiko Isobe and Seiji Niikura",
year = "2008",
month = "9",
doi = "10.1016/j.jlumin.2008.02.012",
language = "English",
volume = "128",
pages = "1515--1522",
journal = "Journal of Luminescence",
issn = "0022-2313",
publisher = "Elsevier",
number = "9",

}

TY - JOUR

T1 - Low-temperature wet chemical synthesis and photoluminescence properties of YVO4

T2 - Bi3+, Eu3+ nanophosphors

AU - Takeshita, Satoru

AU - Isobe, Tetsuhiko

AU - Niikura, Seiji

PY - 2008/9

Y1 - 2008/9

N2 - YVO4: Bi3+, Eu3+nanophosphors are prepared by the citrate-assisted low-temperature wet chemical synthesis. When the colloidal solution is aged at 60 °C, the crystalline YVO4: Bi3+, Eu3+ nanorods are formed from the amorphous gel precursors, as confirmed by transmission electron microscopy and X-ray diffractometry (XRD). YVO4: Bi3+, Eu3+ nanophosphors emit red through energy transfer from Bi3+ to Eu3+ under near-UV-light excitation. The emission intensity increases with increasing the fraction of the crystalline phase during aging. The excitation peak corresponding to Bi3+-V5+ charge transfer relative to those of O2--V5+ and O2--Eu3+ charge transfers gradually becomes strong until the completion of the crystallization, although the contents of individual Bi3+ and Eu3+ ions incorporated into YVO4 keep constant. When the aging is continued after the completion of the crystallization, the content of incorporated Bi3+ gradually increases, and hence the emission intensity decreases as a result of the energy migration among Bi3+ ions. These results suggest that in addition to the fraction of the crystalline phase and the contents of incorporated Bi3+ and Eu3+ ions, the local chemical states around Bi3+ play significant roles in photoluminescence properties.

AB - YVO4: Bi3+, Eu3+nanophosphors are prepared by the citrate-assisted low-temperature wet chemical synthesis. When the colloidal solution is aged at 60 °C, the crystalline YVO4: Bi3+, Eu3+ nanorods are formed from the amorphous gel precursors, as confirmed by transmission electron microscopy and X-ray diffractometry (XRD). YVO4: Bi3+, Eu3+ nanophosphors emit red through energy transfer from Bi3+ to Eu3+ under near-UV-light excitation. The emission intensity increases with increasing the fraction of the crystalline phase during aging. The excitation peak corresponding to Bi3+-V5+ charge transfer relative to those of O2--V5+ and O2--Eu3+ charge transfers gradually becomes strong until the completion of the crystallization, although the contents of individual Bi3+ and Eu3+ ions incorporated into YVO4 keep constant. When the aging is continued after the completion of the crystallization, the content of incorporated Bi3+ gradually increases, and hence the emission intensity decreases as a result of the energy migration among Bi3+ ions. These results suggest that in addition to the fraction of the crystalline phase and the contents of incorporated Bi3+ and Eu3+ ions, the local chemical states around Bi3+ play significant roles in photoluminescence properties.

KW - Eu

KW - Nanophosphor

KW - Photoluminescence

KW - Wet chemical synthesis

KW - YVO: Bi

UR - http://www.scopus.com/inward/record.url?scp=46549089079&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46549089079&partnerID=8YFLogxK

U2 - 10.1016/j.jlumin.2008.02.012

DO - 10.1016/j.jlumin.2008.02.012

M3 - Article

VL - 128

SP - 1515

EP - 1522

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

IS - 9

ER -