Abstract

The authors have observed electrophosphorescence from triplet excimer in poly-(N-vinylcarbazole) (PVK) polymer at room temperature. The triplet excimer appears to be influenced by the PVK molecular conformation. This observation is very important to the understanding of the mechanism of triplet exciton formation in PVK. It is, therefore, an important consideration in selecting materials for phosphor-doped organic light-emitting diode applications.

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