ELECTROLUMINESCENCE FROM A SINGLE LAYER OF POLY(N-VINYLCARBAZOLE) DOPED WITH A NEW 1,2,4-TRIAZOLE DERIVATIVE

T. M. El-Agez, A. A. El Tayyan, M. S. Abdel-Latif

Abstract


We report light emission from a single layer thin film device. This
device is comprised of a hole transporting polymer, poly(N-vinylcarbazole)
(PVK) doped with a new luminescent 1,2,4-triazole derivative sandwiched
between an indium tin oxide electrode (ITO) and an aluminum electrode. We
have studied the current versus voltage (I-V) characteristics, the
electroluminescence versus voltage (EL-V) characteristics, and the lifetime of
the device. Thinner samples revealed a lower EL threshold voltage VT
compared with the conventional organic light emitting diodes (OLEDs)
reported in the literature. This VT increased with increasing the sample
thickness.

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