Arylamine-fluorene alternating copolymer, and electroluminescent element material and electroluminescent element using the copolymer

JP7876964B2Inactive Publication Date: 2026-06-22SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Filing Date
2020-12-23
Publication Date
2026-06-22
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing electroluminescent devices, particularly quantum dot electroluminescent devices, face issues with insufficient durability and luminescence lifetime, especially when using hole transport materials.

Method used

The use of an arylamine-fluorene alternating copolymer with a specific structural unit, represented by formula (1), which enhances hole injection capability and improves luminescence lifetime by interacting closely with quantum dots in the light-emitting layer.

Benefits of technology

The arylamine-fluorene alternating copolymer achieves high durability and luminescence efficiency under low driving voltage, with improved film-forming properties and solvent solubility, enabling large-area production of electroluminescent elements.

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Patent Text Reader

Abstract

To provide: an arylamine-fluorene alternating copolymer that improves durability (particularly a luminescence lifespan) of an electroluminescence device; and an electroluminescence device employing the same.SOLUTION: The arylamine-fluorene alternating copolymer has a structural unit (A) represented by Formula (1). (In Formula (1), R1 to R4 each represent a hydrocarbon group or the like; L1 and L2 each represent an aromatic hydrocarbon group or the like; x is 0, 1, or 2; L2 may form a ring with Ar1; Ar1 represents a divalent aromatic heterocyclic group or the like, and forms a ring with Ar2 or L2; and Ar2 represents an aromatic hydrocarbon group or the like, where Ar2 optionally forms a ring with Ar1.)SELECTED DRAWING: None
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Citation Information

Patent Citations

  • JP2009521118A

  • JP2010199067A

  • JP2018061030A

  • JP2019050369A

  • JP2019050370A