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Title:
ORGANIC ELECTROLUMINESCENT ELEMENT
Document Type and Number:
WIPO Patent Application WO/2011/049241
Kind Code:
A1
Abstract:
Disclosed is an organic electroluminescent element which comprises: an anode; a cathode; a light-emitting layer that is arranged between the anode and the cathode and contains a first light-emitting layer material that contains a phosphorescent compound and a second light-emitting layer material that contains an electron-transporting polymer compound (namely, a light-emitting layer containing a first light-emitting layer material and a second light-emitting layer material); and a hole transport layer that is arranged between the anode and the light-emitting layer so as to be adjacent to the light-emitting layer and is composed of a hole-transporting polymer compound. The organic electroluminescent element is characterized in that the lowest excited triplet energy (T1e) (eV) of the first light-emitting layer material, the lowest excited triplet energy (T1h) (eV) of the second light-emitting layer material and the lowest excited triplet energy (T1t) (eV) of the hole-transporting polymer compound satisfy the following formulae (A) and (B). T1e ≤ T1h (A) T1t - T1e ≤ 0.10 (B)

Inventors:
SOGA MASAYUKI (JP)
ISHII YUSUKE (JP)
Application Number:
PCT/JP2010/069122
Publication Date:
April 28, 2011
Filing Date:
October 21, 2010
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
SOGA MASAYUKI (JP)
ISHII YUSUKE (JP)
International Classes:
H01L51/50; C07D213/22; C07D251/16; C07D265/38; C08K5/3432; C08L65/00
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Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
Nakayama 亨 (JP)
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