Answers are grounded in this paper and cite their sources.
The performance of organic light-emitting diodes (OLEDs) with thick film is optimized. The alternative vanadium oxide (V 2 O 5 ) and N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB) layers are used to enhance holes in the emissive region, and 4,7-dipheny-1,10-phenanthroline (Bphen) doped 8-tris-hydroxyquinoline aluminium (Alq 3 ) is used to enhance electrons in the emissive region, thus ITO/V 2 O 5 (8nm)/NPB (52nm)/V 2 O 5 (8nm)/NPB (52nm)/Alq 3 (30 and 45 nm)/Alq 3 :Bphen (30wt%, 30 and 45nm)/LiF (1 nm)/Al (120 nm) devices are fabricated. The thick-film devices show the turn-on voltage of about 3 V and the maximal power efficiency of 4.5 lm/W, which is 1.46 times higher than the conventional thin-film OLEDs.
No takes yet. Share an insight, caveat, or question.
Zhang et al. (2008) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: