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EP0508562A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Organic electroluminescence element

Assignee: Pioneer Corp
•
Filing: 1992-01-07
•
Granted: —
•
Expires: 2012-01-07
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Abstract

Abstract An organic EL element comprises a cathode (1), an EL layer (3) of organic compound, a first hole transport layer (4) of organic compound, a second hole transport layer (4a) of organic compound and an anode (2) which are laminated in sequence, wherein the second hole transport layer (4a) is made of a substance represented by the following chemical formula 1: where R each independently represents a hydrogen atom, an alkyl group of from 1 to 6 carbon atoms, a halogen group, a cyano group, a nitro group, a primary, secondary or tertiary amino group, or an aryl group of from 6 to 15 carbon atoms. This organic EL element prevents a leakage current and emits light stably for a long time.

Inventors

  • 👤 Kunio C/O Corporate Res. & Dev. Lab. Imai
  • 👤 Masanao Corporate Res. & Dev. Lab. Shinkai
  • 👤 Takeo Corporate Res. & Dev. Lab. Wakimoto
  • 👤 Yasuhiko Shirota

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 01:19
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C07; C07C; C07C211/00; C07C211/43; C07C211/54; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K85/00; H10K85/60; H10K85/631; H10K2102/00; H10K2102/10; H10K2102/101; H10K2102/103; H10K85/10; H10K85/141; H10K85/146; H10K85/30; H10K85/311; H10K85/321; H10K85/324; H10K85/649; H10K85/656; H10K85/6565; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 106 words
An organic electroluminescence element, comprising a cathode (1), an EL layer (3) of organic compound, a first hole transport layer (4) of organic compound, a second hole transport layer (4a) of organic compound and an anode (2) which are laminated in sequence, characterised in that the second hole transport layer (4a) of a substance represented by the following chemical formula 1: where R each independently represents a hydrogen atom, an alkyl group of from 1 to 6 carbon atoms, a halogen group, a cyano group, a nitro group, a primary, secondary or tertiary amino group, or an aryl group of from 6 to 15 carbon atoms.
Claim 2
Dependent Claim 24 words
An organic electroluminescence element according to Claim 1, wherein an organic electron transport layer (5) is provided between said cathode and said fluorescent layer.

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