Cooperative Energy Transfer of Er-Gd-Tb System in Tb³⁺, Er³⁺ Co-Doped K₂GdZr(PO₄)₃ as a Potential Visible Quantum Cutting Phosphor

Abstract:

Tb³⁺, Er³⁺ co-doped K₂GdZr (PO₄)₃ samples were prepared by solid-state reaction method and their photoluminescence (PL) properties were investigated in ultra-violet (UV) and vacuum ultra-violet (VUV) region. The results indicate that the energy transfers from Er³⁺ to Gd³⁺ and from Gd³⁺ to Tb³⁺ required for occurring of visible quantum cutting through down-conversion are efficient. In this cooperative energy transfer process, Gd³⁺ is used as an intermediate of energy transfer between Er³⁺ and Tb³⁺. The optimal quantum efficiency (QE) of this co-doped system K₂GdZr (PO₄)₃ : Er³⁺, Tb³⁺ phosphor reached to 110%, suggesting a potential visible quantum cutting phosphor in practical application.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 585-590
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.585
• Online since: June 2014
• Authors: Liang Feng Niu, Wei Liang*, Chang Zeng Wu, Yu Hua Wang
• Keywords: Cooperative Energy Transfer, Er³⁺, K₂GdZr(PO₄)₃:Tb³⁺, Spectral Characteristics, Visible Quantum Cutting

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