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Luo, Peilan [Verfasser:in]; Ye, Menglin [Verfasser:in]; Zhou, Wenli [Verfasser:in]; Wan, Pingping [Verfasser:in]; Ma, Zhongyun [Verfasser:in]; Qiu, Zhongxian [Verfasser:in]; Zhang, Jilin [Verfasser:in]; Liu, Ru-Shi [Verfasser:in]; Lian, Shixun [Verfasser:in]

Simultaneous Construction of Impermeable Dual-Shell Stabilizing Fluoride Phosphors for White Light-Emitting Diodes

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  • Medientyp: E-Book
  • Titel: Simultaneous Construction of Impermeable Dual-Shell Stabilizing Fluoride Phosphors for White Light-Emitting Diodes
  • Beteiligte: Luo, Peilan [Verfasser:in]; Ye, Menglin [Verfasser:in]; Zhou, Wenli [Verfasser:in]; Wan, Pingping [Verfasser:in]; Ma, Zhongyun [Verfasser:in]; Qiu, Zhongxian [Verfasser:in]; Zhang, Jilin [Verfasser:in]; Liu, Ru-Shi [Verfasser:in]; Lian, Shixun [Verfasser:in]
  • Erschienen: [S.l.]: SSRN, [2022]
  • Umfang: 1 Online-Ressource (31 p)
  • Sprache: Englisch
  • Entstehung:
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  • Beschreibung: The traditional strategy to improve material stability is to cover the surface with a shell to resist adverse environmental factors. For the red-emitting fluoride materials with easily hydrolyzed Mn 4+ on the surface, many strategies have been reported with limited effectiveness. In this work, simultaneous construction of an impermeable dual-shell on Mn 4+ -doped fluoride is proposed to solve the instability problem by a simple pyruvic acid ( PA ) treatment. The internal quantum efficiency of the K 2 SiF 6 :Mn 4+ (KSFM) with dual-shell can be optimized up to 99.71%, the photoluminescence intensity can maintain 88.5% of the original intensity after soaking in water for 360 h, and the body color is not changed even in boiling. The reduction effect of the PA solution builds a hard fluoride shell by removal of the surface Mn 4+ , and the hydrogen bonding effect of PA molecular leads to the formation of a soft organic shell. The dual-shell can effectively block the damage of external water molecules on fluoride surfaces and achieve a significant improvement in water stability. The dual effect of PA is derived from its special molecular structure containing α -ketone carbonyl and carboxyl groups. This hypothesis is supported by the results of the moisture resistance of fluoride-treated with a variety of solvents similar in molecular structure to PA. In addition, DFT calculations simulated various hydrogen bond structures that may be formed between PA molecules and fluoride surface atoms
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