| abstract |
A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit. The light-emitting repeating unit has formula EA-ED-EA. The polymer has a band gap Eg CT of a charge-transfer state formed from the electron-donating (ED) unit and the electron-accepting (EA) unit is smaller than the bandgap of either the electron-accepting unit Eg EA or that of the electron-donating unit Eg ED. Also disclosed, is an organic light-emitting device comprising an anode, a cathode and a light-emitting layer comprising the polymer. |