Patent ID: 7968215
Filing Date: 2011-06-28
Classification: C07D,C09K,H01L,H05B,Y10S

Abstract:
1. An OLED device comprising a cathode, an anode, and having therebetween a light-emitting layer and further comprising a first layer between the light-emitting layer and the cathode containing a cyclobutene compound comprising a cyclobutene nucleus substituted in the 1-position with a five- or six-membered heteroaromatic ring group containing at least one trivalent nitrogen atom; substituted in the 2-position with an aromatic ring group; and substituted with a first methylene group in the 3-position and a second methylene group in the 4-position, provided said first and second methylene groups are further disubstituted in the 1′,1′-positions and the 1″,1″-positions with independently selected aromatic groups.