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:
Dec. 18, 2018
Filed:
Dec. 20, 2012
Cambridge Display Technology Limited, Cambridgeshire, GB;
Sumitomo Chemical Company Limited, Tokyo, JP;
CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, Cambridgeshire, GB;
SUMITOMO CHEMICAL COMPANY LIMITED, Tokyo, JP;
Abstract
A light-emitting composition comprises a polymer and a phosphorescent light-emitting material. The polymer comprises conjugating repeat units of formula (I) and up to 20 mol % of conjugation-blocking repeat units of repeat units of formula (II): Arrepresents an aryl or heteroaryl group; R, which may be the same or different in each occurrence, is a substituent; p is 0 or an integer; Arin each occurrence independently represents a substituted or unsubstituted aryl or heteroaryl group; and Sprepresents an acyclic spacer group that does not provide any conjugation path between the two groups Ar. Optionally, p is 0, 1, 2, 3 or 4 and each Ris a non-polar substituent. Each Ris advantageously selected from Chydrocarbyl substituents. A light-emitting device comprises an anode, a cathode and a light-emitting layer between the anode and the cathode, the light-emitting layer comprising a light-emitting composition as described.