| abstract |
Provided is a light emitting thin film comprising a polymer compound having a polystyrene reduced number average molecular weight of 10 3 -10 8 , and comprising a repeating unit of formula (2-1) to (2-5):n n n nwherein, X represents S or O; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 , each independently represent an alkyl group, alkoxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkenyl group, arylalknyl group, amino group, substituted amino group, silyl group, substituted silyl group, halogen atom, acyl group, acyloxy group, imino group, amide group, imide group, monovalent heterocyclic group, carboxyl group, or substituted carboxyl group; a and b each independently represent an integer of 0-3; c, d, e, and f independently represent an integer of 0-5; g, h, i, and j each independently represent an integer of 0-7; and each of a+b, c+d, e+f, g+h, and i+j is one or more. |