公开(公告)号：US20160226004A1

公开(公告)日：2016-08-04

申请号：US15094317

申请日：2016-04-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Kaori OGITA ,  Satoko SHITAGAKI ,  Nobuharu OHSAWA ,  Satoshi SEO

IPC: H01L51/00 ,  C07D409/10 ,  C09K11/02

CPC classification number: H01L51/0072 ,  C07D401/10 ,  C07D405/10 ,  C07D409/10 ,  C09K11/025 ,  C09K11/06 ,  C09K2211/1029 ,  C09K2211/1088 ,  C09K2211/1092 ,  H01L51/0074 ,  H01L51/5012 ,  H01L51/5016 ,  H05B33/20

Abstract: Provided is a novel heterocyclic compound which can be used as a host material for dispersing a light-emitting material in a light-emitting layer of a light-emitting element. Further provided is a light-emitting element which is driven at a low voltage and has high current efficiency. By including the light-emitting element, a light-emitting device, an electronic device, and a lighting device each with reduced power consumption are provided. The light-emitting element contains a compound in which a dibenzo[f,h]quinoline ring and a hole-transport skeleton are bonded through an arylene group. The light-emitting device, the electronic device, and the lighting device each including the light-emitting element are provided. The light-emitting element contains a heterocyclic compound having a structure represented by the following general formula (G1).

公开(公告)号：US20160126463A1

公开(公告)日：2016-05-05

申请号：US14926861

申请日：2015-10-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Kaori OGITA ,  Tsunenori SUZUKI ,  Satoshi SEO

IPC: H01L51/00 ,  C09K11/06 ,  C07D209/86

CPC classification number: H01L51/0054 ,  C07D209/86 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1014 ,  C09K2211/1029 ,  H01L27/3209 ,  H01L51/0058 ,  H01L51/006 ,  H01L51/0072 ,  H01L51/5012 ,  H01L51/5016 ,  H01L51/5028 ,  H01L51/504 ,  H01L2251/5376

Abstract: Provided is a light-emitting element with high emission efficiency including a fluorescent material as a light-emitting substance. In a light-emitting element including a pair of electrodes and an EL layer between the pair of electrodes, a delayed fluorescence component due to triplet-triplet annihilation accounts for 20% or more of light emitted from the EL layer, and the light has at least one emission spectrum peak in the blue wavelength range. The EL layer includes an organic compound in which an energy difference between the lowest singlet excited energy level and the lowest triplet excited energy level is 0.5 eV or more. The EL layer includes a benzo[a]anthracene compound.

Abstract translation: 提供具有发光效率高的发光元件，其包括作为发光物质的荧光材料。 在一对电极之间包括一对电极和EL层的发光元件中，由于三重态三重态湮灭引起的延迟荧光成分占从EL层发出的光的20％以上， 蓝色波长范围内的最少一个发射光谱峰。 EL层包括其中最低单重激发能级和最低三重激发能级之间的能量差为0.5eV以上的有机化合物。 EL层包括苯并[a]蒽化合物。