Organic light emitting diodes (OLEDs) based on tris-(8-idroxyquinoline)aluminum (Alq3) with enhanced efficiency are reported here. This is obtained by improving the charge carrier balance, through a preliminary NaOH surface treatment of the indium tin oxide (ITO) anode, in order to decrease its work function and, consequently, reduce the hole injection. The obtained devices exhibit a 1.36% external quantum efficiency and a 1.2 lm/W power efficiency at a current density of 60 mA/cm2. These values are more than double as compared with those of identical reference devices fabricated without the preliminary NaOH surface treatment.
Cusumano, P. (2009). Efficiency enhancement of organic light emitting diodes by NaOH surface treatment of the ITO anode. SOLID-STATE ELECTRONICS, 53(9), 1056-1058 [10.1016/j.sse.2009.05.005].
Efficiency enhancement of organic light emitting diodes by NaOH surface treatment of the ITO anode
CUSUMANO, Pasquale
2009-01-01
Abstract
Organic light emitting diodes (OLEDs) based on tris-(8-idroxyquinoline)aluminum (Alq3) with enhanced efficiency are reported here. This is obtained by improving the charge carrier balance, through a preliminary NaOH surface treatment of the indium tin oxide (ITO) anode, in order to decrease its work function and, consequently, reduce the hole injection. The obtained devices exhibit a 1.36% external quantum efficiency and a 1.2 lm/W power efficiency at a current density of 60 mA/cm2. These values are more than double as compared with those of identical reference devices fabricated without the preliminary NaOH surface treatment.
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