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A study of metal (Li, Ag) diffusion has been carried out in an archetypal OLED device based on N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine|tris(8-hydroxyquinolinato) aluminum|4,7-diphenyl-1,10-phenanthroline (NPB|Alq3|Bphen). Using single-stack and two-stack tandem OLED structures with variations of layer thicknesses and metal layer placements, we have found that Ag vapor-deposited...
Instead of physical mixtures as bipolar charge transport media for organic electronics, chemical hybrids comprising non-conjugated spacers are explored to strive for miscibility and morphological stability. Bipolar TRZ-3Cz(MP)2 and TRZ-1Cz(MP)2 as well as unipolar C3-2TRZ(2tBu), C2-2TRZ(2tBu) and C3-2Cz(MP)2 were synthesized with propylene or ethylene spacers serving to decouple the Cz(MP)2 and TRZ...
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