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:
Apr. 19, 2016
Filed:
Sep. 14, 2006
Nobuhiko Akino, Koshigaya, JP;
Chizu Sekine, Tsukuba, JP;
Satoshi Mikami, Tsukuba, JP;
Tomoya Nakatani, Tsukuba, JP;
Nobuhiko Akino, Koshigaya, JP;
Chizu Sekine, Tsukuba, JP;
Satoshi Mikami, Tsukuba, JP;
Tomoya Nakatani, Tsukuba, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Zof the main repeating minimum unit of the polymer falls within the following range: 0<Z≦2.00 (1) wherein the electronic conjunction chain coefficient Zis defined as a slope obtained by linear approximation of function T=T(1/n) by the least square method wherein nrepresents the number of conjugated electrons contained in repeating minimum units; and Trepresents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Zis used.