Moisture-resistant electroluminescent phosphor with high...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 11/02 (2006.01) C09K 11/56 (2006.01) C09K 11/58 (2006.01)

Patent

CA 2631729

The present invention is an electroluminescent phosphor wherein each individual phosphor particle is encapsulated in an inorganic coating applied by an atomic layer deposition (ALD) coating method. In a preferred embodiment, the coating is aluminum oxyhydroxide. The encapsulated phosphor shows an extreme insensitivity to atmospheric moisture and suffers only minor loss of initial brightness in lamps.

La présente invention concerne un phosphore électroluminescent dans lequel chaque particule individuelle de phosphore est encapsulée dans un revêtement inorganique appliqué au moyen d'un procédé de revêtement par dépôt de couche atomique (ADL). Dans une forme de réalisation préférée, le revêtement est de l'oxyhydroxyde d'aluminium. Le phosphore encapsulé présente une extrême insensibilité à l'humidité atmosphérique et ne subit qu'une perte minime de sa luminosité initiale dans les lampes.

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