| abstract |
A light-emitting composition comprising a mixture of a fluorescent light-emitting material a triplet-accepting copolymer comprising a triplet-accepting repeat unit and a repeat unit of formula (I): n nwherein A is a divalent group; R 1 independently in each occurrence is a substituent; R 2 in each occurrence is H or a substituent; and x independently in each occurrence is 0, 1, 2 or 3. |