The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2024
Filed:
Apr. 24, 2019
Sumitomo Chemical Company, Limited, Tokyo, JP;
Toshiaki Sasada, Tsukuba, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
A light emitting device contains an anode, cathode, and two organic layers provided therebetween. One organic layer contains a phosphorescent compound, the second organic layer contains a block copolymer containing an end group, a block that binds to the end group and/or a block that does not bind to the end group, and a crosslinked product of the block copolymer. The non-terminal block contains a non-crosslinkable unit represented by the formula (X) and/or a non-crosslinkable unit represented by the formula (Z). At least one of X>X; Z>Z; X+Z>X+Zis satisfied when the total number of units having formula (X) and the total number of units having formula (Z) in the non-terminal block are Xand Z, respectively, and the total number of units having formula (X) and the total number of units having formula (Z) in the terminal block are Xand Z, respectively.