Invention Grant
- Patent Title: Organic electroluminescent element, organic electroluminescent display device, organic electroluminescent illuminating device, and method for manufacturing organic electroluminescent element
- Patent Title (中): 有机电致发光元件,有机电致发光显示装置,有机电致发光照明装置以及有机电致发光元件的制造方法
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Application No.: US13389244Application Date: 2010-04-22
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Publication No.: US08729596B2Publication Date: 2014-05-20
- Inventor: Yoshimasa Fujita
- Applicant: Yoshimasa Fujita
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Morrison & Foerster LLP
- Priority: JP2009-193380 20090824
- International Application: PCT/JP2010/002902 WO 20100422
- International Announcement: WO2011/024348 WO 20110303
- Main IPC: H01L33/00
- IPC: H01L33/00

Abstract:
An organic electroluminescent element comprising: an anode (3); a cathode (4); and an organic layer (5), sandwiched between the anode (3) and the cathode (4), which contains a positive and negative charge transporting material, the organic layer (5) including an acceptor region (6) doped with an acceptor, a donor region (8) doped with a donor, and a light-emitting region (7) doped with an organic light-emitting material, the acceptor region (6) being located on the anode (3), the donor region (8) being located on the cathode (4), the light-emitting region (7) being located between the acceptor region (6) and the donor region (8), the acceptor having such a concentration gradient in the acceptor region (6) as to become lower in concentration from the anode (3) toward the light-emitting region (7), the donor having such a concentration gradient in the donor region (8) as to become lower in concentration from the cathode (4) toward the light-emitting region (7). This makes it possible to provide a simple-structured, high-luminance, high-efficiency, and long-life organic EL element.
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