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

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

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ASJC Scopus subject areas

Engineering(all)

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Nishimura, F., & Isobe, T. (2005). Effects of surface modification on photoluminescence properties of LaPO₄:Ce,Tb nano-phosphor synthesized by solvotliernial reaction. 513-516. Paper presented at IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005, Takamatsu, Japan.

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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+.",

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AU - Isobe, T.

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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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