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A red-emitting phosphor K 5 In 3 F 14 :Mn 4+ and its potential application in the backlighting

Optical Materials, ISSN: 0925-3467, Vol: 126, Page: 112223
2022
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A red-emitting phosphor with a short fluorescence lifetime plays an important role in LED backlighting. Herein, new red phosphor K 5 In 3 F 14 :Mn 4+ (0.59%) with a tetragonal structure was prepared with the non-equivalent doping of Mn 4+. The typical luminescent behaviors of Mn 4+ can be observed from the phosphors. Different from the fluoride phosphors with the equivalent doping of Mn 4+, K 5 In 3 F 14 :Mn 4+ (0.59%) has a short decay time (2.74 ms). The white LED fabricated with K 5 In 3 F 14 :Mn 4+ (0.59%) and commercial β-SiALON:Eu 2+ emits bright white light under a 20 mA current, and its color gamut is up to 103% of the National Television System Committee (NTSC) standard value. So, K 5 In 3 F 14 :Mn 4+ (0.59%) is a potential red component for LED backlighting.

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