Title:
発光素子、発光装置及び電子機器
Document Type and Number:
Japanese Patent JP5395476
Kind Code:
B2
Abstract:
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.
Inventors:
Nobuharu Osawa
Application Number:
JP2009065377A
Publication Date:
January 22, 2014
Filing Date:
March 18, 2009
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01L51/50; H05B33/12
Domestic Patent References:
| JP2006060198A | ||||
| JP2007091721A | ||||
| JP2009016478A | ||||
| JP2009048893A |