| abstract |
Provide is a polymeric fluorescent substance or polymeric fluorescent substance solution which can attain higher luminous efficiency as a polymer LED, with using a polymeric fluorescent substance having a specific content of water or poor solvent, or a polymeric fluorescent substance solution containing a specific content of water or poor solvent. n Also provided is an organic electroluminescence device comprising at least one light-emitting layer containing substantially no particle-like foreign materials having a diameter of more than 1 μm and having few dark spots. |