公开(公告)号：US20210143352A1

公开(公告)日：2021-05-13

申请号：US17091206

申请日：2020-11-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Takeyoshi WATABE ,  Tomohiro KUBOTA ,  Airi UEDA ,  Satoshi SEO ,  Nobuharu OHSAWA ,  Yuko KUBOTA

IPC: H01L51/50 ,  H01L51/00

Abstract: A light-emitting apparatus with low power consumption is provided. A light-emitting apparatus including a first light-emitting device and a first color conversion layer. The first light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a layer including a material with a refractive index lower than or equal to 1.75 at 467 nm. The first color conversion layer includes a first substance capable of emission by absorbing light. Light emitted from the first light-emitting device enters the first color conversion layer.

公开(公告)号：US20170294594A1

公开(公告)日：2017-10-12

申请号：US15634114

申请日：2017-06-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko INOUE ,  Tomohiro KUBOTA ,  Satoshi SEO ,  Hayato YAMAWAKI ,  Yasushi KITANO

IPC: H01L51/00 ,  C09K11/06 ,  C07D409/10

CPC classification number: H01L51/0074 ,  C07D409/10 ,  C09K11/06 ,  C09K2211/1018 ,  H01L51/0072 ,  H01L51/5012

Abstract: A dibenzo[f,h]quinoxaline derivative in which impurities are reduced and a novel method of synthesizing the dibenzo[f,h]quinoxaline derivative in which impurities are reduced are provided. In addition, a light-emitting element, a light-emitting device, an electronic appliance, or a lighting device with high emission efficiency and high reliability in which the dibenzo[f,h]quinoxaline derivative is used as an EL material is provided. In the synthesis method, a 2-(chloroaryl)dibenzo[f,h]quinoxaline derivative is used as a synthetic intermediate in a synthetic pathway so that an impurity contained in a final product can be removed easily by purification by sublimation.