Abstract
Electroluminescent (EL) properties of 6, 6 ⁗ -dimethyl-4 ′,4 ‴-diphenyl-2,2 ′:6 ′,2 ″:6 ″,2 ‴: 6 ‴,2 ⁗ -quinquepyridine (DMDPQPY) have been examined. The EL results of typical single layer devices indicate that emitting layer thickness can influence the emission wavelength. The introduction of a hole transporting layer in the double layer device enhances the luminance greatly, showing a better charge balance. It is proposed that 2,6-linked poly(oligo) pyridine derivatives are promising to form a new class of EL material both as emitter and as carrier transporter.
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