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1. (WO2018122677) LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE

Pub. No.:    WO/2018/122677    International Application No.:    PCT/IB2017/058090
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 20 00:59:59 CET 2017
IPC: H01L 51/50
C09K 11/06
Applicants: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventors: WATABE, Takeyoshi
SEO, Satoshi
KOMATSU, Nozomi
YAMAOKA, Ryohei
OSAKA, Harue
SUZUKI, Kunihiko
HOSOUMI, Shunsuke
Title: LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE
Abstract:
A highly reliable light-emitting element having high emission efficiency is provided. The light-emitting element includes a light-emitting layer including a first organic compound and a guest material. The first organic compound has a substituted or unsubstituted carbazole skeleton. In the light-emitting layer, the weight ratio of a hydrocarbon group substitution product in which at least one of hydrogen atoms in the first organic compound is substituted by a hydrocarbon group having 1 to 6 carbon atoms to the first organic compound is greater than 0 and less than or equal to 0.1.