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Electroluminiscent conjugated polymers modified with high electronegative heterocyclic moieties and their applications in polymeric light emitting diodes
Electroluminiscent conjugated polymers modified with high electronegative heterocyclic moieties and their applications in polymeric light emitting diodes
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机译:高电负性杂环基改性的电致发光共轭聚合物及其在聚合物发光二极管中的应用
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摘要
This invention provides a method for syntheses of new electroluminescent conjugated polymers modified with high electronegative heterocyclic groups (such as 1,3,4-oxadiazole-diyl, 1,3,4-thiadiazole-diyl, and 1,2,4-triazole-diyl). These electroluminescent polymers (homopolymers, statistical copolymers or block coplymers) are obtained by polymerization of bis(halomethyl) arenes modified with heterocyclic groups via the Wessling precursor route, Gilch side chain route, Wittig reaction or Wittig-Hornor reaction. By a proper selection of the monomers and their ratios in the polymerization, the emissive polymers (fully conjugated or limited conjugating length) covering the full visible range even extending to the near-IR range can be prepared. The polymeric light emitting diodes (PLED) with these materials as emissive layer or electron transport layer have high external quantum efficiency and can be used as indicators and displays for cellular phones, pagers, portable computer, wristwatch, toys, etc.
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