A New Dual-Emission Phosphor Ca₄Si₂O₇F₂:Ce³⁺, Mn²⁺ with Energy Transfer for Near-UV LEDs

Authors

• Wei Lü, Chinese Academy of Sciences
• Yongshi Luo, Chinese Academy of Sciences
• Zhendong Hao, Chinese Academy of Sciences
• Xia Zhang, Chinese Academy of Sciences
• Xiao-Jun Wang, Georgia Southern UniversityFollow
• Jiahua Zhang, Chinese Academy of Sciences

Document Type

Article

Publication Date

6-2012

Publication Title

Materials Letters

DOI

10.1016/j.matlet.2012.02.095

Abstract

Ce^{3 +} and Mn^{2 +} co-doped Ca₄Si₂O₇F₂ phosphors have been synthesized by high temperature solid state reaction and their luminescence properties are investigated. The effect of Ce^{3 +} concentration on the emission intensity of Ca₄Si₂O₇F₂: Ce^{3 +} is studied, and the emission intensity reaches a maximum at 4% Ce^{3 +}. Energy transfer from Ce^{3 +} to Mn^{2 +} is observed. The emission spectra of the phosphors show a blue broad band at 460 nm of Ce^{3 +} and a yellow band at 580 nm of Mn^{2 +}, originate from the allowed 5d → 4f transition of the Ce^{3 +} ion and the ⁴T_1g(⁴G) → ⁶A_1g(⁶S) transition of the Mn^{2 +} ion, respectively. Results indicate that the varied emitted color from blue to yellow can be achieved by tuning the relative ratio of the Ce^{3 +} to Mn^{2 +} ions based on the principle of energy transfer. We have demonstrated that Ca₄Si₂O₇F₂: Ce^{3 +}, Mn^{2 +} phosphors can be a promising candidate for a color-tunable phosphor applied in a near-UV White light emitting diodes.

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Recommended Citation

Lü, Wei, Yongshi Luo, Zhendong Hao, Xia Zhang, Xiao-Jun Wang, Jiahua Zhang. 2012. "A New Dual-Emission Phosphor Ca₄Si₂O₇F₂:Ce³⁺, Mn²⁺ with Energy Transfer for Near-UV LEDs." Materials Letters, 77: 45-47: Elsevier. doi: 10.1016/j.matlet.2012.02.095
https://digitalcommons.georgiasouthern.edu/physics-facpubs/44

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