Abstract
Copolyfluorenes with various concentrations (2, 4, 8, 12, 16, and 20%) of red-light emitting Ir(III)-complex Ir(thq)2(dbm) units on the main chain are synthesized and the photoluminescence is investigated at 298-12K. The intensity of the emission at about 620nm increases with increasing the Ir-complex concentration from 2% to 4% but decreases with increasing the concentration from 4% by the concentration quenching, while the blue emission from polyfluorene also decreases by energy transfer to Ircomplex. The two emission intensities increase with decreasing temperature from 298K to 12K. The red emission shows a red shift with increasing the concentration, by the solid state solvation effect.
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