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

Xian-Tao, Wei; Jiang-Bo, Zhao; Yong-Hu, Chen; Min, Yin; Yong, Li

Abstract

Bi3+ and Yb3+ codoped cubic Y2O3 phosphors are prepared by pechini sol–gel method. Strong near-infrared (NIR) emission around 980 nm from Yb3+ (2F5/2 →2 F7/2) is observed under ultraviolet light excitation. A broad excitation band ranging from 320 to 360 nm, owing to the 6s2 → 6s6p transition of Bi3+ ions, is recorded when the Yb3+ emission is monitored, which suggests a very efficient energy transfer from Bi3+ ions to Yb3+ ions. The Yb3+ concentration dependences of both the Bi3+ and the Yb3+ emissions are investigated. The decay curve of Bi3+ emission under the excitation of 355 nm pulse laser is used to explore the Bi3+ → Yb3+ energy transfer process. Cooperative energy transfer (CET) is discussed as a possible mechanism for the near-infrared emission.

Citation

Xian-Tao, W., Jiang-Bo, Z., Yong-Hu, C., Min, Y., & Yong, L. (2010). Quantum cutting downconversion by cooperative energy transfer from Bi3+ to Yb3+ in Y2O3 phosphor. Chinese Physics B, 19(7), Article 077804. https://doi.org/10.1088/1674-1056/19/7/077804

• Journal Article Type: Article
• Publication Date: 2010
• Deposit Date: Apr 14, 2022
• Print ISSN: 1674-1056
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 19
• Issue: 7
• Article Number: 077804
• DOI: https://doi.org/10.1088/1674-1056/19/7/077804
• Public URL: https://hull-repository.worktribe.com/output/3969920
• Publisher URL: http://dx.doi.org/10.1088/1674-1056/19/7/077804