Narrow Band Emitting LED Phosphors for Wide Color Gamut Displays & Energy Efficient SSL

Although the first commercial LED packages using GE RadiantRed™ technology, specifically the K 2 SiF 6 :Mn 4+ (KSF) phosphor, came more than a year after the commercial introduction of quantum dot LCD displays, packages using this red-line emitting LED phosphor (λ max = 631nm) have penetrated the market at more than five times the rate of quantum dot displays. Over 20 billion LEDs containing GE RadiantRed™ technology have been sold, making this phosphor the red emitting luminescent material of choice for wide color gamut displays. Continual improvements in absorption, quantum efficiency and stability under high humidity and high light flux will be presented that have resulted in commercialization of this material as GE TriGain™ phosphors. Additionally, GE has developed new types of TriGain™ phosphor that include reducing the photoluminescent decay time by 30% and decreasing the particle size by a factor of 10 to meet the needs for next generation, wide color gamut displays. Lastly, progress on narrow band green phosphors will be discussed that when combined with RadiantRED™ technology provide an on-chip, RoHS compliant package that reaches up to 95% rec2020.