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Synthesis and luminescence properties of novel deep red emitting phosphors Li₂MgGeO₄:Mn⁴⁺

Renping Cao

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

Corresponding author.

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Dong Ceng

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

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Xiaoguang Yu

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

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Siling Guo

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

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Yufeng Wen

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

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, and

Guotai Zheng

College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, P. R. China

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https://doi.org/10.1142/S1793604715500460Cited by:18 (Source: Crossref)

Abstract

Novel deep red phosphor Li₂MgGeO₄:Mn⁴⁺ is synthesized by high temperature solid state reaction method in air. The strongest PL band peaking at ~ 671 nm in the range of 600–750 nm is due to the ²E → ⁴A₂ transition of Mn⁴⁺ ion and the PLE spectra shows broad band peaking at ~ 323 within the range 220–550 nm owing to the ⁴A₂ → ⁴T₁ transitions of Mn⁴⁺ ion. The optimum Mn⁴⁺ doping concentration is about 0.4 mol.%. The luminous mechanism is explained by Tanabe–Sugano diagram of Mn⁴⁺ ion. The results indicate that red phosphor Li₂MgGeO₄:Mn⁴⁺ is a beneficial phosphor for use in white light-emitting-diodes (LEDs).

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