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:
May. 26, 2015
Filed:
Nov. 30, 2012
Feng-wen Yen, Hsinchu, TW;
Cheng-hao Chang, Hsinchu, TW;
Hsu-kai Chang, Hsinchu, TW;
Feng-ying Wang, Hsinchu, TW;
Feng-Wen Yen, Hsinchu, TW;
Cheng-Hao Chang, Hsinchu, TW;
Hsu-Kai Chang, Hsinchu, TW;
Feng-Ying Wang, Hsinchu, TW;
Other;
Abstract
The present invention discloses a new fluorene compound and organic EL device using the compound. The organic EL device employing the new fluorene compound as host material can lower driving voltage, prolong half-lifetime. The fluorene compound can functions as blue emitting host material of a light emitting layer and improve CIE color purity in blue emitting device. The fluorene compound are represented by the following formula(A): Wherein Rto Rare identical or different. Rto Rare independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms. R˜Rare identical or different Rto Rare independently selected from the group consisting of hydrogen atom, halide, alkyl group, aryl group, heteroaryl group. m and n are independently an integer of 0 to 3, X is selected from carbon or nitrogen.