Encapsulated electroluminescent phosphor and method for...

Details Encapsulated electroluminescent phosphor and method for... Encapsulated electroluminescent phosphor and method for...

C - Chemistry, Metallurgy

09

K

31/105, 117/48.5

C09K 11/02 (2006.01) C09K 11/54 (2006.01) C23C 16/40 (2006.01) C23C 16/442 (2006.01)

Patent

CA 2035294

Encapsulated electroluminescent phosphor particles and method for making same. The phosphor particles are encapsulated in a very thin oxide layer to protect them from aging due to moisture intrusion. The particles are encapsulated via a vapor phase hydrolysis reaction of oxide precursor materials at a temperature of between about 25°C and about 170°C, preferably between about 100°C and about 150°C. The resultant encapsulated particles exhibit a surprising combination of high initial luminescent brightness and high resistance to humidity-accelerated brightness decay.

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