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Amplified spontaneous emission (ASE) in optically pumped polymeric films containing the luminescent and hole-transporting organic molecule N,N′-Bis(3-methylphenyl)-N,N′diphenylbenzidine (TPD) is demonstrated. ASE is observed in polymer films of polystyrene and poly(N-vinylcarbazole) doped up to 20% with TPD. From these results, we conclude that TPD-based films are candidates for blue-emitting organic diode lasers.
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Díaz‐García et al. (2002) studied this question.
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