• Patent Title: Organic electroluminescence element
  • Application No.: US15525161
    Application Date: 2015-11-05
  • Publication No.: US10050237B2
    Publication Date: 2018-08-14
  • Inventor: Ken Okamoto
  • Applicant: KONICA MINOLTA, INC.
  • Applicant Address: JP Tokyo
  • Assignee: Konica Minolta, Inc.
  • Current Assignee: Konica Minolta, Inc.
  • Current Assignee Address: JP Tokyo
  • Agency: Cozen O'Connor
  • Priority: JP2014-231166 20141114
  • International Application: PCT/JP2015/081135 WO 20151105
  • International Announcement: WO2016/076187 WO 20160519
  • Main IPC: H01L51/52
  • IPC: H01L51/52
Organic electroluminescence element
Abstract:
An object of the present invention is to provide an organic electroluminescent element containing: a plurality of light emitting units interposed between a pair of an anode and a cathode; and a charge generating unit formed between the light emitting units, wherein a light emitting layer of a light emitting unit located in an N-th order from the anode and a light emitting layer of a light emitting unit located in an (N+1)-th order from the anode each contain an emission dopant to emit light of the same emission color; and a largest maximum emission wavelength in a photoluminescent spectrum of the emission dopant in the light emitting layer of the N-th light emitting unit is shorter than a largest maximum emission wavelength in a photoluminescent spectrum of the emission dopant in the light emitting layer of the (N+1)-th light emitting unit.
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