Quantum cutting downconversion by cooperative energy transfer from Bi3+ to Yb3+ in Y2O3 phosphor

doi:10.1088/1674-1056/19/7/077804

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 77804-077804.doi: 10.1088/1674-1056/19/7/077804

Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor

韦先涛, 赵江波, 陈永虎, 尹民, 李勇

Department of Physics, University of Science and Technology of China, Hefei 230026, China

出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Nature Science Foundation of China (Grant No. 10774140), the Knowledge Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-YW-M11), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20060358054), and the Special Foundation for Talents of Anhui Province, China (Grant No. 2007Z021).

Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor

Wei Xian-Tao(韦先涛), Zhao Jiang-Bo(赵江波), Chen Yong-Hu(陈永虎), Yin Min(尹民)^†, and Li Yong(李勇)

Department of Physics, University of Science and Technology of China, Hefei 230026, China

Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Nature Science Foundation of China (Grant No. 10774140), the Knowledge Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-YW-M11), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20060358054), and the Special Foundation for Talents of Anhui Province, China (Grant No. 2007Z021).

摘要/Abstract

摘要： Bi³⁺ and Yb³⁺ codoped cubic Y₂O₃ phosphors are prepared by pechini sol—gel method. Strong near-infrared (NIR) emission around 980 nm from Yb^{3 +}(²F^{_{5 / 2}}→²F^{_{7 / 2}}) is observed under ultraviolet light excitation. A broad excitation band ranging from 320 to 360 nm, owing to the 6s² →6s6p transition of Bi^{3 +}ions, is recorded when the Yb^{3 +}emission is monitored, which suggests a very efficient energy transfer from Bi^{3 +}ions to Yb^{3 +}ions. The Yb^{3 +}concentration dependences of both the Bi^{3 +}and the Yb^{3 +}emissions are investigated. The decay curve of Bi^{3 +}emission under the excitation of 355 nm pulse laser is used to explore the Bi^{3 + →}Yb^{3 +}energy transfer process. Cooperative energy transfer (CET) is discussed as a possible mechanism for the near-infrared emission.

Abstract: Bi³⁺ and Yb³⁺ codoped cubic Y₂O₃ phosphors are prepared by pechini sol—gel method. Strong near-infrared (NIR) emission around 980 nm from Yb^{3 +}(²F^{_{5 / 2}}→²F^{_{7 / 2}}) is observed under ultraviolet light excitation. A broad excitation band ranging from 320 to 360 nm, owing to the 6s² →6s6p transition of Bi^{3 +}ions, is recorded when the Yb^{3 +}emission is monitored, which suggests a very efficient energy transfer from Bi^{3 +}ions to Yb^{3 +}ions. The Yb^{3 +}concentration dependences of both the Bi^{3 +}and the Yb^{3 +}emissions are investigated. The decay curve of Bi^{3 +}emission under the excitation of 355 nm pulse laser is used to explore the Bi^{3 + →}Yb^{3 +}energy transfer process. Cooperative energy transfer (CET) is discussed as a possible mechanism for the near-infrared emission.

Key words: downconversion, cooperative energy transfer, photoluminescence

中图分类号: (Other solid inorganic materials)

78.55.Hx

81.20.Fw (Sol-gel processing, precipitation)

韦先涛, 赵江波, 陈永虎, 尹民, 李勇. Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor[J]. 中国物理B, 2010, 19(7): 77804-077804.

Wei Xian-Tao(韦先涛), Zhao Jiang-Bo(赵江波), Chen Yong-Hu(陈永虎), Yin Min(尹民), and Li Yong(李勇). Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor[J]. Chin. Phys. B, 2010, 19(7): 77804-077804.

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Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor

Quantum cutting downconversion by cooperative energy transfer from Bi³⁺ to Yb³⁺ in Y₂O₃ phosphor

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