The β-Phase of Poly(9,9-dioctylfluorene) as a Potential System for Electrically Pumped Organic Lasing



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The β-phase of poly(9,9-dioctylfluorene) (PFO) shows a very low amplified spontaneous emission threshold because of its well-resolved emission spectrum. Within the amorphous PFO, the β-phase sites act similar to a dopant as they trap excitons and charges. The figure shows the blue-light-emitting β-phase in a PFO solution.