Interesting. Sounds like they are trying to move away from encapsulation. Don't hold your breath waiting on this to come to market though.
"Its internal internal quantum efficiency was measured in the range 60–69%. Deriving the extraction-efficiency from these results gave a range of 68–78%, eventually giving an average figure of 73%. As well as impacting on device brightness, encapsulants also tend to degrade at higher flux densities. Therefore, finding ways to reach high extraction-efficiencies without them holds promise for higher-brightness LEDs."
"Its internal internal quantum efficiency was measured in the range 60–69%. Deriving the extraction-efficiency from these results gave a range of 68–78%, eventually giving an average figure of 73%. As well as impacting on device brightness, encapsulants also tend to degrade at higher flux densities. Therefore, finding ways to reach high extraction-efficiencies without them holds promise for higher-brightness LEDs."
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