Title:
発光素子、発光装置、照明装置及び電子機器
Document Type and Number:
Japanese Patent JP7021332
Kind Code:
B2
Abstract:
Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound.
Inventors:
Satoshi Satoshi
Tomoko Numata
Nobuharu Osawa
Eiko Yoshizumi
Kunihiko Suzuki
Tomoko Numata
Nobuharu Osawa
Eiko Yoshizumi
Kunihiko Suzuki
Application Number:
JP2020196916A
Publication Date:
February 16, 2022
Filing Date:
November 27, 2020
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01L51/50
Domestic Patent References:
| JP2006203172A | ||||
| JP2006510230A |
Other References:
Phosphorescence from iridium complexes doped into polymer blends,JOURNAL OF APPLIED PHYSICS,米国,2004年02月,Vol.95,No.3,pp.948-953
KONDAKOVA, Marina E. et al.,High-efficiency, low-voltage phosphorescent organic light-emitting diode devices with mixed host,Journal of Applied Physics,2008年11月04日,Vol.104,pp.094501-(1-17)
SEO, Ji Hyun et al.,Efficient blue-green organic light-emitting diodes based on heteroleptic tris-cyclometalated iridium(III) complexes,Thin Solid Films,2008年09月25日,vol.517,pp.1807-1810
TAMAYO, Arnold B. et al.,Synthesis and characterization of facial and meridional tris-cyclometalated iridium(III) complexes,J. Am. Chem. Soc.,2003年05月22日,Vol.125,pp.7377-7387
KONDAKOVA, Marina E. et al.,High-efficiency, low-voltage phosphorescent organic light-emitting diode devices with mixed host,Journal of Applied Physics,2008年11月04日,Vol.104,pp.094501-(1-17)
SEO, Ji Hyun et al.,Efficient blue-green organic light-emitting diodes based on heteroleptic tris-cyclometalated iridium(III) complexes,Thin Solid Films,2008年09月25日,vol.517,pp.1807-1810
TAMAYO, Arnold B. et al.,Synthesis and characterization of facial and meridional tris-cyclometalated iridium(III) complexes,J. Am. Chem. Soc.,2003年05月22日,Vol.125,pp.7377-7387
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