Light-Emitting Element, Light-Emitting Device and Electronic Device
申请人:OHSAWA Nobuharu
公开号:US20090236980A1
公开(公告)日:2009-09-24
A light-emitting element with improved emission efficiency is provided. The light-emitting element includes a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked in contact with each other over an anode, and a first substance serving as an emission center substance in the second light-emitting layer is the same as a main substance in the first light-emitting layer. Note that a second substance is added to the first light-emitting layer for stabilization of film quality, and a third substance serving as a host material to disperse the first substance serving as an emission center substance is included in the second light-emitting layer. In the light-emitting element, the second substance and the third substance are substances having energy gaps (or triplet energy) larger than the first substance.
ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE IN WHICH THE ANTHRACENE DERIVATIVE IS USED
申请人:KAWAKAMI Sachiko
公开号:US20080268284A1
公开(公告)日:2008-10-30
An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (8) are provided. Further, by use of the anthracene derivative represented by the general formula (1), a light-emitting element with high emission efficiency can be obtained. Furthermore, by use of the anthracene derivative represented by the general formula (1), a light-emitting element that emits blue light with high color purity can be obtained.
Light-emitting element, light-emitting device and electronic device
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US08278649B2
公开(公告)日:2012-10-02
A light-emitting element with improved emission efficiency is provided. The light-emitting element includes a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked in contact with each other over an anode, and a first substance serving as an emission center substance in the second light-emitting layer constitutes the first light-emitting layer. A second substance serving as a host material to disperse the first substance serving as an emission center substance is included in the second light-emitting layer. In the light-emitting element, the second substance is a substance having an energy gap (or triplet energy) larger than the first substance.
Anthracene derivative, material for light-emitting element, light-emitting element, light-emitting device, and electronic appliance
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US08110122B2
公开(公告)日:2012-02-07
An anthracene derivative represented by general formula (1) is provided. In the formula, Ar1, Ar3, Ar5, and Ar6 independently represent an aryl group having 6 to 13 carbon atoms, Ar2 and Ar4 independently represent an arylene group having 6 to 13 carbon atoms, and R1 to R8 independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms. Ar1 to Ar6 may independently have a substituent. When Ar1 to Ar6 independently have two or more substituents, the substituents may be bonded to each other to form a ring. When a carbon atom of Ar1 to Ar6 has two substituents, the substituents may be bonded to each other to form a spiro ring.
Light-Emitting Element, Light-Emitting Device, and Electronic Device
申请人:Ohsawa Nobuharu
公开号:US20130009141A1
公开(公告)日:2013-01-10
A light-emitting element with improved emission efficiency is provided. The light-emitting element includes a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked in contact with each other over an anode, and a first substance serving as an emission center substance in the second light-emitting layer constitutes the first light-emitting layer. A second substance serving as a host material to disperse the first substance serving as an emission center substance is included in the second light-emitting layer. In the light-emitting element, the second substance is a substance having an energy gap (or triplet energy) larger than the first substance.