Effects of surface modification on photoluminescence properties of LaPO4:Ce,Tb nano-phosphor synthesized by solvotliernial reaction

F. Nishimura; T. Isobe

Effects of surface modification on photoluminescence properties of LaPO₄:Ce,Tb nano-phosphor synthesized by solvotliernial reaction

F. Nishimura, T. Isobe

Department of Applied Chemistry

Research output: Contribution to conference › Paper › peer-review

2 Citations (Scopus)

Abstract

The transparent colloidal solution of LaPO₄:Ce,Tb nano-phosphor is synthesized from lanthanum acetate, cerium acetate, terbium acetate and trimethyl phosphate by the solvothermal reaction at 140°C in the mixture of water and methanol. The green photoluminescence (PL) due to the f-f transition of Tb³⁺ is observed by exciting the d-f transition of Ce ³⁺, followed by the energy transfer from Ce³⁺ to Tb ³⁺. The surface modification of LaPO₄:Ce,Tb nano-phosphor powder by lauryl phosphate increases the PL intensity by a factor of 18. The surface modification is effective for LaPO₄:Ce, but not for LaPO ₄:Tb. These results suggest that the surface-passivation plays a significant role in the suppression of energy loss and the higher site-symmetry around Ce³⁺.

Original language	English
Pages	513-516
Number of pages	4
Publication status	Published - 2005 Dec 1
Event	IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005 - Takamatsu, Japan Duration: 2005 Dec 6 → 2005 Dec 9

Other

Other	IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005
Country	Japan
City	Takamatsu
Period	05/12/6 → 05/12/9

ASJC Scopus subject areas

Engineering(all)

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title = "Effects of surface modification on photoluminescence properties of LaPO4:Ce,Tb nano-phosphor synthesized by solvotliernial reaction",

abstract = "The transparent colloidal solution of LaPO4:Ce,Tb nano-phosphor is synthesized from lanthanum acetate, cerium acetate, terbium acetate and trimethyl phosphate by the solvothermal reaction at 140°C in the mixture of water and methanol. The green photoluminescence (PL) due to the f-f transition of Tb3+ is observed by exciting the d-f transition of Ce 3+, followed by the energy transfer from Ce3+ to Tb 3+. The surface modification of LaPO4:Ce,Tb nano-phosphor powder by lauryl phosphate increases the PL intensity by a factor of 18. The surface modification is effective for LaPO4:Ce, but not for LaPO 4:Tb. These results suggest that the surface-passivation plays a significant role in the suppression of energy loss and the higher site-symmetry around Ce3+.",

author = "F. Nishimura and T. Isobe",

year = "2005",

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day = "1",

language = "English",

pages = "513--516",

note = "IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005 ; Conference date: 06-12-2005 Through 09-12-2005",

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T1 - Effects of surface modification on photoluminescence properties of LaPO4:Ce,Tb nano-phosphor synthesized by solvotliernial reaction

AU - Nishimura, F.

AU - Isobe, T.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The transparent colloidal solution of LaPO4:Ce,Tb nano-phosphor is synthesized from lanthanum acetate, cerium acetate, terbium acetate and trimethyl phosphate by the solvothermal reaction at 140°C in the mixture of water and methanol. The green photoluminescence (PL) due to the f-f transition of Tb3+ is observed by exciting the d-f transition of Ce 3+, followed by the energy transfer from Ce3+ to Tb 3+. The surface modification of LaPO4:Ce,Tb nano-phosphor powder by lauryl phosphate increases the PL intensity by a factor of 18. The surface modification is effective for LaPO4:Ce, but not for LaPO 4:Tb. These results suggest that the surface-passivation plays a significant role in the suppression of energy loss and the higher site-symmetry around Ce3+.

AB - The transparent colloidal solution of LaPO4:Ce,Tb nano-phosphor is synthesized from lanthanum acetate, cerium acetate, terbium acetate and trimethyl phosphate by the solvothermal reaction at 140°C in the mixture of water and methanol. The green photoluminescence (PL) due to the f-f transition of Tb3+ is observed by exciting the d-f transition of Ce 3+, followed by the energy transfer from Ce3+ to Tb 3+. The surface modification of LaPO4:Ce,Tb nano-phosphor powder by lauryl phosphate increases the PL intensity by a factor of 18. The surface modification is effective for LaPO4:Ce, but not for LaPO 4:Tb. These results suggest that the surface-passivation plays a significant role in the suppression of energy loss and the higher site-symmetry around Ce3+.

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