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US 7,250,226 B2Granted
Phosphorescent compound, a phosphorescent composition and an organic light-emitting device
AssigneesNippon Hoso Kyokai, Showa Denko K.K.
InventorsShizuo Tokito, Mitsunori Suzuki, Isao Tanaka, Youji Inoue, Koro Shirane, Masataka Takeuchi, Naoko Ito
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Abstract
An organic polymeric phosphorescent compound and an organic light-emitting device employing the organic polymeric phosphorescent compound. The phosphorescent compound is a neutral organic polymeric phosphorescent compound emitting phosphorescence and used in an organic light-emitting device, and includes a phosphorescent unit and a carrier transporting unit.
Claims27
A neutral organic polymeric phosphorescent compound which is obtainable by means of radical copolymerization of vinyl compounds, comprising:
- at least one phosphorescent unit being a repeat unit for emitting phosphorescence and
- at least one carrier transportation unit being a repeat unit for transporting a carrier, wherein
- both a phosphorescent site of the phosphorescent unit and a carrier transportation site of the carrier transportation unit constitute side chains,
- the carrier transportation unit is selected from the group consisting of a hole transportation unit being a repeat unit for transporting a hole and an electron transportation unit being a repeat unit for transporting an electron, and
- the hole transportation unit comprises a hole transportation site being a group of a compound selected from the group consisting of triphenylamine and triphenylamine derivatives, triophene derivatives, benzene derivatives, styrene derivatives, and fluorene derivatives.
2 more elements
Dependencies are inferred from the claim text.