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Electroluminescence of blends of hole-transporting polymer and hole-blocking polymer

Electroluminescence of blends of hole-transporting polymer and hole-blocking polymer,10.1016/j.physb.2005.11.160,Physica B-condensed Matter,Shengyi Ya

Electroluminescence of blends of hole-transporting polymer and hole-blocking polymer   (Citations: 1)
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In this paper, the electroluminescence (EL) of the blends of a hole-transporting polymer and a hole-blocking polymer, i.e. poly (N-vinyl-carbazole) (PVK) and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), in different weight ratios (k=MPVK:MBCP) is reported. Being different from the photoluminescence (PL) of PVK film and BCP film, the EL spectrum of device ITO/Blend/Alq3(15nm)/Al (peaks at around 520nm) where blend in weight ratios of k=1:1, k=2:1 and k=3:1, respectively, is different from that of blends in weight ratios of k=1:2 and k=1:3. By sandwiching another hole-blocking (BCP) layer, it peaks at around 500nm for ITO/Blend/BCP(20nm)/Alq3(12nm)/Al under high electric field for blends in all the above weight ratios and it is suggested that this emission peaking at around 500nm is from BCP in the blends layer.
Journal: Physica B-condensed Matter - PHYSICA B , vol. 373, no. 2, pp. 229-232, 2006
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