| abstract |
The present invention provides a copolymer that is useful as a light emitting material or a charge transporting material and has excellent device characteristics such as a low light emission starting voltage. A copolymer comprising a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2). (1) [In formula, A ring and B ring represent the aromatic ring which may have a substituent each independently. X is -O-, -S- or the like. ] (2) [wherein Y is —O—, —S— or the like. ] [Selection figure] None |