Energy Transfer and Spectroscopic Characterization of New Green Emitting Li₃Ba₂Gd₃(WO₄)₈:Tb³⁺ Phosphor

Abstract:

A new tungstate family, Li₃Ba₂Gd₃(WO₄)₈ doped with Tb³⁺ is synthesized by using a conventional high-temperature solid-state method to explore new pure green phosphors for white light-emitting diodes (WLEDs). The results from the X-Ray patterns show that the crystal structures of the hosts are composed of tungstate zigzags and the Gd³⁺-Gd³⁺ units, which are isolated by the [WO₄]^2- groups. The critical concentration of Tb³⁺ is up to x=2.0 in the singly doped phosphors, which is ascribed to the interaction of the isolated Gd³⁺ ions being mitigated by [WO₄]^2- groups. The characteristic green emission peaks at around 547 nm are also observed, which result from the ⁵D₄→⁷F₅ transition of Tb³⁺ ions, and the optimal doping concentration is x=2.0.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 686-691
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.686
• Online since: August 2018
• Authors: Wen Lei Guo, Yan Ting Jiao, Ping Shun Wang, Qi Liu, Shan Liu, Feng Hou
• Keywords: Energy Transfer, Li₃Ba₂Gd₃(WO₄)₈, Phosphor

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