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Synthesis of K 2 SiF 6 : Mn 4+ Phosphor from SiO 2 Powders via Redox Reaction in HF / KMnO 4 Solution and Their Application in Warm‐White LED
Author(s) -
Liao Chenxing,
Cao Renping,
Ma Zhijun,
Li Yang,
Dong Guoping,
Sharafudeen Kaniyarakkal N.,
Qiu Jianrong
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12533
Subject(s) - phosphor , chemistry , analytical chemistry (journal) , doping , materials science , optoelectronics , chromatography
In this article, we propose a facile method for synthesis of K 2 SiF 6 : Mn 4+ phosphor and discuss its promising application in warm‐white light emitting diodes ( LED ). The K 2 SiF 6 :Mn 4+ was synthesized from SiO 2 powders through redox reaction in HF / KMnO 4 solution. The optical properties of LED s containing different ratios of K 2 SiF 6 : Mn 4+ phosphor and commercial Ce 3+ ‐doped garnets ( YAG ‐40) yellow–green phosphor were studied. A warm‐white LED , with color temperature of 3510 K and color rendering index of 90.9 and efficacy of 81.56 lm/W was demonstrated.