Photobleaching properties of YVO4:Eu3+ nanophosphors synthesized by hydrothermal treatment

Tetsuhito Muto; Satoru Takeshita; Tetsuhiko Isobe; Tomohiro Sawayama; Seiji Niikura

Photobleaching properties of YVO₄:Eu³⁺ nanophosphors synthesized by hydrothermal treatment

Tetsuhito Muto, Satoru Takeshita, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

Department of Applied Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 Citations (Scopus)

Abstract

When YVO₄:Eu³⁺ nanophosphors synthesized by a low-temperature wet chemical process in the presence of citrate ions are continuously excited by UV light, the photoluminescence (PL) intensity gradually decreases. This photobleaching is accompanied with the reduction of V ⁵⁺ to V⁴⁺, as confirmed by electron paramagnetic resonance spectroscopy. Hydrothermal treatment of YVO₄:Eu³⁺ nanophosphors in the presence of PO4^3- ions produces Y(V, P)O ₄:Eu³⁺ through the partial replacement berween VO4 ^3- and PO4^3-, and hence results in the increase in the PL intensity and the suppression of photobleaching.

Original language	English
Title of host publication	ECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors
Pages	135-140
Number of pages	6
Edition	31
Publication status	Published - 2009 Nov 25
Event	Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting - Honolulu, HI, United States Duration: 2008 Oct 12 → 2008 Oct 17

Publication series

Name	ECS Transactions
Number	31
Volume	16
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting
Country/Territory	United States
City	Honolulu, HI
Period	08/10/12 → 08/10/17

ASJC Scopus subject areas

Engineering(all)

Cite this

Photobleaching properties of YVO₄:Eu³⁺ nanophosphors synthesized by hydrothermal treatment. / Muto, Tetsuhito; Takeshita, Satoru; Isobe, Tetsuhiko et al.
ECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors. 31. ed. 2009. p. 135-140 (ECS Transactions; Vol. 16, No. 31).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Muto, T, Takeshita, S, Isobe, T, Sawayama, T & Niikura, S 2009, Photobleaching properties of YVO₄:Eu³⁺ nanophosphors synthesized by hydrothermal treatment. in ECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors. 31 edn, ECS Transactions, no. 31, vol. 16, pp. 135-140, Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting, Honolulu, HI, United States, 08/10/12.

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abstract = "When YVO4:Eu3+ nanophosphors synthesized by a low-temperature wet chemical process in the presence of citrate ions are continuously excited by UV light, the photoluminescence (PL) intensity gradually decreases. This photobleaching is accompanied with the reduction of V 5+ to V4+, as confirmed by electron paramagnetic resonance spectroscopy. Hydrothermal treatment of YVO4:Eu3+ nanophosphors in the presence of PO43- ions produces Y(V, P)O 4:Eu3+ through the partial replacement berween VO4 3- and PO43-, and hence results in the increase in the PL intensity and the suppression of photobleaching.",

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AU - Sawayama, Tomohiro

AU - Niikura, Seiji

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AB - When YVO4:Eu3+ nanophosphors synthesized by a low-temperature wet chemical process in the presence of citrate ions are continuously excited by UV light, the photoluminescence (PL) intensity gradually decreases. This photobleaching is accompanied with the reduction of V 5+ to V4+, as confirmed by electron paramagnetic resonance spectroscopy. Hydrothermal treatment of YVO4:Eu3+ nanophosphors in the presence of PO43- ions produces Y(V, P)O 4:Eu3+ through the partial replacement berween VO4 3- and PO43-, and hence results in the increase in the PL intensity and the suppression of photobleaching.

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