| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fluorene-triphenylamine copolymer having high hole mobility and high triplet energy level as well as excellent electrical stability, and suitable for film formation by wet film formation method, and provide a composition, a liquid composition, a thin film, an element, a planar light source and a display device comprising the copolymer.SOLUTION: A fluorene-triphenylamine copolymer comprises a repeating unit that is represented by formula (1), has substituents at positions represented by R-R, and has a crosslinkable group at any position of Ar, Ar, Ar, Ar, and Aras a substituent.</p> |
