US 11,925,046 B2
Light-emitting device, light-emitting method, and organic light-emitting element
Chihaya Adachi, Fukuoka (JP); Hajime Nakanotani, Fukuoka (JP); Takahiko Yamanaka, Hamamatsu (JP); Shigeo Hara, Hamamatsu (JP); and Toru Hirohata, Hamamatsu (JP)
Assigned to KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Fukuoka (JP); and HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed by KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Fukuoka (JP); and HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed on Jul. 29, 2020, as Appl. No. 16/942,283.
Claims priority of application No. 2019-142844 (JP), filed on Aug. 2, 2019; and application No. 2020-097798 (JP), filed on Jun. 4, 2020.
Prior Publication US 2021/0036256 A1, Feb. 4, 2021
Int. Cl. H10K 50/18 (2023.01); H10K 50/11 (2023.01); H10K 71/00 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/18 (2023.02) [H10K 50/11 (2023.02); H10K 71/00 (2023.02); H10K 2101/40 (2023.02)] 7 Claims
OG exemplary drawing
 
1. An organic light-emitting element comprising:
a first electrode that functions as a positive electrode;
a second electrode that functions as a negative electrode;
an organic light-emitting layer which is disposed between the first electrode and the second electrode and which is configured so that separation of charges occurs due to incidence of excited light therein; and
at least one of a charge inflow blocking layer that is disposed between the first electrode and the organic light-emitting layer and blocks inflow of holes from the first electrode to the organic light-emitting layer, and a charge inflow blocking layer that is disposed between the second electrode and the organic light-emitting layer and blocks inflow of electrons from the second electrode to the organic light-emitting layer, wherein
the charge inflow blocking layer disposed between the first electrode and the organic light-emitting layer has a HOMO level deeper than a HOMO level of organic light emitters included in the organic light-emitting layer,
the charge inflow blocking layer disposed between the second electrode and the organic light-emitting layer has a LUMO level shallower than a LUMO level of the organic light emitters, and
a dipole moment of the organic light emitters is 3 D or greater.