abstract |
A polymeric fluorescent substance exhibiting fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 1×10 3 to 1×10 8 , and comprising one or more repeating units of formula (1) and one or more repeating units of formula (8),n n—Ar 1 —(CR 1 ═CR 2 ) n — (1)n n—Ar 2 —(CR 36 ═CR 37 ) n — (8)n nwherein Ar 1 represents a specific arylene or a divalent heterocyclic compound group, and Ar 2 represent an arylene or a divalent heterocyclic compound group other than Ar 1 . By using the polymeric fluorescent substance, a high performance polymer LED can easily be obtained. |