| http://www.w3.org/ns/prov#value | - Preferred blue light emitting compounds having fused aromatic ring groups of 4 to 24 carbons, such as naphthalene and anthracene, include: Preferred blue light emitting compounds with aryl groups having 5 to 20 carbons as well as an alkyl amino group or an aryl amino group of 4 to 25 carbons include: Preferred blue light emitting compounds with carbazole derivatives having an alkyl group or an ary
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