Simultaneous construction of impermeable dual-shell stabilizing fluoride phosphors for white light-emitting diodes

Luo, Peilan; Ye, Menglin; Zhou, Wenli; Wan, Pingping; Ma, Zhongyun; Qiu, Zhongxian; Zhang, Jilin; Liu, Ru‐Shi; Lian, Shixun

doi:10.1016/j.cej.2022.134951

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…OA and SiO 2 coatings were constructed by the hydrothermal method and the stirring method at room temperature to obtain a double-coated structural material, namely, KTF@OA@SiO 2 . Luo et al [ 40 ] added K 2 SiF 6 : Mn 4+ to pyruvate (PA, 98%), stirred it for 6 h, washed it with ethanol, and dried it to obtain KSRM-98PA. PA first reacted with Mn 4+ on the surface to construct a Mn 4+ -free layer on the surface.…”

Section: Preparation Methods Of Shell Layer In a 2 ...mentioning

confidence: 99%

“…Both improved the water resistance of K 2 SiF 6 : Mn 4+ . In addition, Luo et al [ 40 ] treated K 2 SiF 6 : Mn 4+ (KSFM) with pyruvate in one step to construct an impermeable dual-shell-stabilized fluoride phosphor, namely, KSFM-98PA.…”

Section: Classification Of the Shell Layer In A 2 ...mentioning

confidence: 99%

“…However, the synthesis temperature of this method was high, and there was a risk of toxic by-products. Luo et al [ 40 ] used pyruvate to prepare KFSM-98PA with a bilayer shell, and its internal quantum efficiency (IQE) value was as high as 99.71%. However, due to the influence of the shell, the PL intensity was 90% of the original KSFM.…”

Section: Fluorescent Properties and Water Resistancementioning

confidence: 99%

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Recent Research Progress of Mn4+-Doped A2MF6 (A = Li, Na, K, Cs, or Rb; M = Si, Ti, Ge, or Sn) Red Phosphors Based on a Core–Shell Structure

et al. 2023

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White light emitting diodes (WLEDs) are widely used due to their advantages of high efficiency, low electricity consumption, long service life, quick response time, environmental protection, and so on. The addition of red phosphor is beneficial to further improve the quality of WLEDs. The search for novel red phosphors has focused mainly on Eu2+ ion- and Mn4+ ion-doped compounds. Both of them have emissions in the red region, absorption in blue region, and similar quantum yields. Eu2+-doped phosphors possess a rather broad-band emission with a tail in the deep red spectral range, where the sensitivity of the human eye is significantly reduced, resulting in a decrease in luminous efficacy of WLEDs. Mn4+ ions provide a narrow emission band ~670 nm in oxide hosts, which is still almost unrecognizable to the human eye. Mn4+-doped fluoride phosphors have become one of the research hotspots in recent years due to their excellent fluorescent properties, thermal stability, and low cost. They possess broad absorption in the blue region, and a series of narrow red emission bands at around 630 nm, which are suitable to serve as red emitting components of WLEDs. However, the problem of easy hydrolysis in humid environments limits their application. Recent studies have shown that constructing a core–shell structure can effectively improve the water resistance of Mn4+-doped fluorides. This paper outlines the research progress of Mn4+-doped fluoride A2MF6 (A = Li, Na, K, Cs, or Rb; M = Si, Ti, Ge or Sn), which has been based on the core–shell structure in recent years. From the viewpoint of the core–shell structure, this paper mainly emphasizes the shell layer classification, synthesis methods, luminescent mechanism, the effect on luminescent properties, and water resistance, and it also gives some applications in terms of WLEDs. Moreover, it proposes challenges and developments in the future.

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Section: Preparation Methods Of Shell Layer In a 2 ...mentioning

confidence: 99%

Section: Classification Of the Shell Layer In A 2 ...mentioning

confidence: 99%

Section: Fluorescent Properties and Water Resistancementioning

confidence: 99%

See 1 more Smart Citation

Recent Research Progress of Mn4+-Doped A2MF6 (A = Li, Na, K, Cs, or Rb; M = Si, Ti, Ge, or Sn) Red Phosphors Based on a Core–Shell Structure

et al. 2023

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“…36 Moreover, with simple pyruvate treatment, both inorganic and organic bivalves were constructed on the fluoride surface, which significantly improved the water stability of the material. 37 In addition, lattice manipulation 38 and crystallinity enhancement 39 through ion doping engineering are also effective strategies to enhance the luminescence efficiency and stability. 40 The importance of shell lattice properties for the environmental stability of red-emitting core-shell fluorides is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Surface lattice enhancement of red-emitting fluorides enabled by embedding small cations

Zhou

Wan

Chen

et al. 2023

Inorg. Chem. Front.

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Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight display

Liu

Cheng

Yang

et al. 2022

Ceramics International

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Simultaneous construction of impermeable dual-shell stabilizing fluoride phosphors for white light-emitting diodes

Cited by 12 publications

References 47 publications

Recent Research Progress of Mn4+-Doped A2MF6 (A = Li, Na, K, Cs, or Rb; M = Si, Ti, Ge, or Sn) Red Phosphors Based on a Core–Shell Structure

Recent Research Progress of Mn4+-Doped A2MF6 (A = Li, Na, K, Cs, or Rb; M = Si, Ti, Ge, or Sn) Red Phosphors Based on a Core–Shell Structure

Surface lattice enhancement of red-emitting fluorides enabled by embedding small cations

Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight display

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