Invention Grant
- Patent Title: Organic electroluminescence element
- Patent Title (中): 有机电致发光元件
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Application No.: US12379329Application Date: 2009-02-19
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Publication No.: US08174001B2Publication Date: 2012-05-08
- Inventor: Yoshitaka Kitamura , Manabu Tobise , Masaru Kinoshita
- Applicant: Yoshitaka Kitamura , Manabu Tobise , Masaru Kinoshita
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: SOLARIS Intellectual Property Group, PLLC
- Priority: JP2008-052504 20080303
- Main IPC: H01L35/24
- IPC: H01L35/24

Abstract:
An organic electroluminescence element including at least two light-emitting layers disposed between an anode and a cathode, wherein the at least two light-emitting layers include a light-emitting layer A that contains an electron transporting light-emitting material and a hole transporting host material, wherein a concentration of the electron transporting light-emitting material gradually increases from an anode side toward a cathode side of the light-emitting layer A, and a light-emitting layer B that contains a hole transporting light-emitting material and an electron transporting host material, wherein a concentration of the hole transporting light-emitting material gradually decreases from an anode side toward a cathode side of the light-emitting layer B. An organic EL element with high light-emission efficiency and excellent durability is provided.
Public/Granted literature
- US20090218561A1 Organic electroluminescence element Public/Granted day:2009-09-03
Information query
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