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Title:
有機EL素子
Document Type and Number:
Japanese Patent JP4916102
Kind Code:
B2
Abstract:

To provide an organic EL element which has a hole injection layer, prevents excitation energy from reaching the hole injection layer, and also prevents electrons from reaching the hole injection layer, whereby an element lifetime can be enhanced and moreover it is not hard for a current to flow; and to provide a display unit and a lighting unit equipped therewith.

An organic electroluminescence element has a structure obtained by laminating an anode, the hole injection layer, a luminescent layer and a cathode in this order. The organic electroluminescence element has a hole transport layer between the hole injection layer and the luminescent layer, and band gap energy (Eg(HTL)) of the hole transport layer and band gap energy (Eg(EML)) of the luminescent layer satisfy a relational expression (1): ¾Eg(HTL)¾<¾Eg(EML)¾.

COPYRIGHT: (C)2006,JPO&NCIPI


Inventors:
Etsumasa Fujita
Application Number:
JP2004278035A
Publication Date:
April 11, 2012
Filing Date:
September 24, 2004
Export Citation:
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Assignee:
Sharp Corporation
International Classes:
H01L51/50; C09K11/06; G09F9/30; H01L27/32
Domestic Patent References:
JP2003123985A
JP2003338382A
JP2002507825A
JP2000208260A
JP2004014172A
JP2005524201A
Foreign References:
WO2003092072A1
Attorney, Agent or Firm:
Atomi International Patent Office



 
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