| 摘要 |
An electroluminescent element comprising a pair of electrodes, i.e., a positive electrode and a negative electrode, at least one of which is transparent or translucent and an organic layer interposed between the electrodes, wherein the organic layer comprises a copolymer represented by the following formula (1) and having 9-oxo-9-phosphafluorene-2,7-diyl skeletons and arylene skeletons in the main chain and has a thickness of 1 nm to 10 žm: (1) wherein R represents hydrogen, alkyl, cycloalkyl, aralkyl, aryl, alkyloxy, cycloalkyloxy, aralkyloxy, or aryloxy; Ar represents arylene; and n is an integer of 3 to 30,000. |
