US 11,985,892 B2
Light-emitting device, light-emitting apparatus, electronic device, and lighting device
Takeyoshi Watabe, Kanagawa (JP); Ryohei Yamaoka, Kanagawa (JP); Satoshi Seo, Kanagawa (JP); and Nobuharu Ohsawa, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., (JP)
Appl. No. 16/645,104
Filed by Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
PCT Filed Sep. 5, 2018, PCT No. PCT/IB2018/056757
§ 371(c)(1), (2) Date Mar. 6, 2020,
PCT Pub. No. WO2019/053559, PCT Pub. Date Mar. 21, 2019.
Claims priority of application No. 2017-174456 (JP), filed on Sep. 12, 2017; application No. 2017-231719 (JP), filed on Dec. 1, 2017; application No. 2018-037254 (JP), filed on Mar. 2, 2018; and application No. 2018-096997 (JP), filed on May 21, 2018.
Prior Publication US 2021/0384442 A1, Dec. 9, 2021
Int. Cl. H01L 29/08 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); B82Y 20/00 (2011.01); H10K 50/11 (2023.01); H10K 50/115 (2023.01); H10K 50/16 (2023.01); H10K 50/858 (2023.01); H10K 101/10 (2023.01); H10K 101/40 (2023.01)
CPC H10K 85/6572 (2023.02) [H10K 85/342 (2023.02); H10K 85/631 (2023.02); H10K 85/654 (2023.02); H10K 85/6576 (2023.02); B82Y 20/00 (2013.01); H10K 50/11 (2023.02); H10K 50/115 (2023.02); H10K 50/16 (2023.02); H10K 50/858 (2023.02); H10K 2101/10 (2023.02); H10K 2101/40 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a first electrode;
a second electrode over the first electrode;
a first layer over and in contact with the second electrode;
a light-emitting layer over the first layer;
a third electrode over the light-emitting layer; and
an organic layer over and in contact with the third electrode,
wherein the first electrode is capable of reflecting light,
wherein the third electrode is capable of reflecting and transmitting light,
wherein the second electrode is capable of transmitting light,
wherein the second electrode has a higher refractive index than the first layer,
wherein the first layer comprises an organic compound and an acceptor material,
wherein the second electrode is a layer of an inorganic material,
wherein an emission spectrum of the light-emitting device has a peak wavelength λ,
wherein each of the first layer and the light-emitting layer has a first interface on a side of the first electrode and a second interface on a side of the third electrode,
wherein one of an optical path length from the first interface of the light-emitting layer to the first interface of the first layer and an optical path length from the second interface of the light-emitting layer to the first interface of the first layer is less than or equal to λ/2, and
wherein a refractive index of the first layer is less than or equal to 1.80.