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ChemInform Abstract: Synthesis and Optical Performance of a New Red-Emitting ZnTiF6·6H2O:Mn4+Phosphor for Warm White-Light-Emitting Diodes
- Source :
- ChemInform. 47
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- Mn4+-activated fluoride compounds, emerging as highly efficient rare-earth-free red-emitting phosphors, have been regarded as excellent color converters for warm white-light-emitting diodes recently. In this paper, using a facile two-step co-precipitation approach, we report the synthesis and structure of a novel ZnTiF6·6H2O:Mn4+ red-emitting phosphor as well as its optical performance in detail. Particularly, the as-prepared yellowish ZnTiF6·6H2O:Mn4+ powders exhibit an intense narrow-band Mn4+ 2Eg → 4A2g red emission with internal quantum efficiency of 26.4% upon the excitation of blue light corresponding to 4A2g → 4T2g transitions of Mn4+. As a consequence, the warm white-light-emitting diodes with tunable correlated color temperature and color rendering index can be easily realized by combining ZnTiF6·6H2O:Mn4+ red phosphor with commercial YAG:Ce3+ yellow phosphor on the blue-InGaN chip.
Details
- ISSN :
- 09317597
- Volume :
- 47
- Database :
- OpenAIRE
- Journal :
- ChemInform
- Accession number :
- edsair.doi...........0c18b80f6256d20be646f34457745b09