The next battle in the LED phosphor industry stems from the rapid growth of LED applications that require warm colors and saturated reds in display or residential and retail lighting. For these, additional red and/or green phosphors are added to the mix. Nitrides and Oxynitrides offer excellent performance but are both controlled by Denka and Mitsubishi Chemicals, with strong IP obtained from NIMS. Market price for these materials is 5x to 10x higher than that of yellow phosphors.Multiple organizations are therefore scrambling to develop better, cheaper and non IP-restricted compositions. Tungstates, molybdates, carbidonitrides, Green Aluminates and Selenides are being investigated. In addition, Quantum Dots are finally emerging as a credible alternative to traditional phosphor in some applications.
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