Invention Grant
- Patent Title: Organic electroluminescent element, organic electroluminescent panel, organic electroluminescent unit, and electronic apparatus
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Application No.: US16027181Application Date: 2018-07-03
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Publication No.: US10854680B2Publication Date: 2020-12-01
- Inventor: Kazuhiro Yokota
- Applicant: JOLED INC.
- Applicant Address: JP Tokyo
- Assignee: JOLED INC.
- Current Assignee: JOLED INC.
- Current Assignee Address: JP Tokyo
- Agency: Hauptman Ham, LLP
- Priority: JP2017-131260 20170704; JP2017-134603 20170710
- Main IPC: H01L27/32
- IPC: H01L27/32 ; H01L51/52 ; H01L51/50

Abstract:
An organic electroluminescent element includes, in order, an anode, an organic layer including a light-emitting layer, and a cathode. The organic layer further includes a first organic layer that is provided between the light-emitting layer and the anode, and includes a hole transport layer. The hole transport layer includes a material having an absorption coefficient of 0.01 or greater and 0.06 or less. The light-emitting layer has a light-emitting center receding from a first interface of the light-emitting layer by a thickness greater than 0 and equal to or less than 0.4, where the light-emitting layer has a thickness of 1. The first interface is adjacent to the anode. The organic electroluminescent element further includes a microcavity structure in which the position of the interface is a resonance point.
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