Very low turn-on voltage and high brightness tris-(8-hydroxyquinoline) aluminum-based organic light-emitting diodes with a $MoOx$ $p$-doping layer Available to Purchase

We have demonstrated an organic light-emitting diode based on molybdenum oxide $(MoOx)$ doped $4,4′,4″$-tris(3-methylphenylphenylamino)triphenylamine $(m-MTDATA)$ as a $p$-type doping hole injection layer. The tris-(8-hydroxyquinoline) aluminum $(Alq3)$-based organic light-emitting diodes show high brightness at very low operating voltage, $100cd∕m2$ at $3.2V$ and $1000cd∕m2$ at $4.4V$⁠, corresponding to a low turn-on voltage of $2.4V$⁠. Such improved properties are attributed to the formation of the charge transfer complex produced by doping $MoOx$ into $m-MTDATA$⁠, which provides much more free hole carriers, and the introduction of an efficient electron-injecting layer to improve the performance.