Different Phases of Fluorido‐Tantalates

Boča, Miroslav; Kubíková, Blanka; Šimko, František; Gembický, Milan; Moncóľ, Ján; Jomová, Klaudia

doi:10.1002/9781118448847.ch3c

Molten Salts Chemistry and Technology 2014

DOI: 10.1002/9781118448847.ch3c

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Different Phases of Fluorido‐Tantalates

Miroslav Boča¹,

Blanka Kubíková²,

František Šimko³

et al.

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2019

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Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs

et al. 2019

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A novel red oxyfluoride phosphor K3TaO2F4:Mn4+ has been prepared by a simple two-step synthesis method. The structure, composition, and luminescence properties of K3TaO2F4:Mn4+ phosphors were investigated and discussed in detail. The real structure of K3TaO2F4 was carefully studied through X-ray powder diffraction data Rietveld refinement. K3TaO2F4 holds a D 4h group symmetry [TaO2F4]3– octahedron with the oxygen occupying the para-position. Under ultraviolet (UV) and blue light excitation, K3TaO2F4:Mn4+ phosphor emits a narrow band red emission peaking at 630 nm. High-performance warm white-light-emitting diodes (WLEDs) were fabricated using a blue LED chip, YAG:Ce3+ yellow phosphor, and K3TaO2F4:Mn4+ red phosphor. This device exhibits high color quality (CCT = 3488 K, Ra = 93.0, R9 = 90.0), which indicates that Mn4+-doped K3TaO2F4 would be a promising red phosphor for WLED applications.

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Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs

et al. 2019

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Different Phases of Fluorido‐Tantalates

Cited by 1 publication

References 15 publications

Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs

Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs

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Different Phases of Fluorido‐Tantalates

Cited by 1 publication

References 15 publications

Structure and Luminescence Properties of Mn4+-Activated K3TaO2F4 Red Phosphor for White LEDs

Structure and Luminescence Properties of Mn4+-Activated K3TaO2F4 Red Phosphor for White LEDs

Contact Info

Product

Resources

About

Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs

Structure and Luminescence Properties of Mn⁴⁺-Activated K₃TaO₂F₄ Red Phosphor for White LEDs