A new and efficient red phosphor for solid-state lighting: Cs2TiF6:Mn4+

Cs2TiF6:Mn4+ powder as a novel red phosphor has been successfully fabricated on a large scale through the cation exchange method using K2MnF6 as a Mn4+ source at ambient temperature. The Cs2TiF6:Mn4+ product is well crystallized into a single-phase with a hexagonal micro-rod morphology and presents sharp red emissions under blue light illumination. It can significantly improve Ra and CCT levels of the YAG type white LED used for indoor lighting.

[1]  Yuexiao Pan,et al.  Hydrothermal synthesis and photoluminescence properties of red phosphor BaSiF6:Mn4+ for LED applications , 2014 .

[2]  Ru‐Shi Liu,et al.  Photoluminescent Evolution Induced by Structural Transformation Through Thermal Treating in the Red Narrow-Band Phosphor K₂GeF₆:Mn⁴⁺. , 2015, ACS applied materials & interfaces.

[3]  W. Palmer.  Experimental Inorganic Chemistry , 1954 .

[4]  S. Adachi,et al.  Properties of Mn4+-Activated Hexafluorotitanate Phosphors , 2011 .

[5]  S. Adachi,et al.  Photoluminescent properties of K2GeF6:Mn4+ red phosphor synthesized from aqueous HF/KMnO4 solution , 2009 .

[6]  Ru‐Shi Liu,et al.  Preparation of a novel red Rb2SiF6:Mn4+ phosphor with high thermal stability through a simple one-step approach , 2015 .

[7]  R. G. Chandran,et al.  Crystal Chemistry and Luminescence of Ce3+-Doped Lu2CaMg2(Si,Ge)3O12 and Its Use in LED Based Lighting , 2006 .

[8]  Jong Kyu Kim,et al.  Solid-State Light Sources Getting Smart , 2005, Science.

[9]  S. Adachi,et al.  Mn-activated Na2SiF6 red and yellowish-green phosphors: A comparative study , 2011 .

[10]  Yuexiao Pan,et al.  Optimized photoluminescence of red phosphor K2TiF6:Mn4+ synthesized at room temperature and its formation mechanism , 2015 .

[11]  S. Adachi,et al.  Optical properties of Mn4+-activated Na2SnF6 and Cs2SnF6 red phosphors , 2011 .

[12]  Y. Liu,et al.  Red-emitting phosphors Na2XF6:Mn4+ (X = Si, Ge, Ti) with high colour-purity for warm white-light-emitting diodes , 2015 .

[13]  K. Machida,et al.  Characterization and luminescence properties of Sr2Si5N8:Eu2+ phosphor for white light-emitting-diode illumination , 2006 .

[14]  Chongfeng Guo,et al.  Methods to improve the fluorescence intensity of CaS:Eu2+ red-emitting phosphor for white LED , 2006 .

[15]  Ru‐Shi Liu,et al.  Synthesis of Na2SiF6:Mn4+ red phosphors for white LED applications by co-precipitation , 2014 .

[16]  Ru‐Shi Liu,et al.  Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes , 2014, Nature Communications.

[17]  S. Denbaars,et al.  A green-yellow emitting oxyfluoride solid solution phosphor Sr2Ba(AlO4F)1−x(SiO5)x:Ce3+ for thermally stable, high color rendition solid state white lighting , 2012 .

[18]  Chun Che Lin,et al.  Advances in Phosphors for Light-emitting Diodes. , 2011, The journal of physical chemistry letters.

[19]  Ping Liu,et al.  Shape-controlled synthesis of phosphor K2SiF6:Mn4+ nanorods and their luminescence properties , 2015 .

[20]  Y. Liu,et al.  A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices , 2015 .

[21]  Yuexiao Pan,et al.  The formation mechanism, improved photoluminescence and LED applications of red phosphor K2SiF6:Mn4+ , 2014 .

[22]  Ru‐Shi Liu,et al.  A low-temperature co-precipitation approach to synthesize fluoride phosphors K2MF6:Mn4+ (M = Ge, Si) for white LED applications , 2015 .

[23]  Yuexiao Pan,et al.  A red phosphor BaTiF(6):Mn(4+): reaction mechanism, microstructures, optical properties, and applications for white LEDs. , 2014, Dalton transactions.