Abstract
We studied the new transparent anode to replace indium tin oxide (ITO). We used a semi-transparent metal film for an anode of organic light-emitting diodes (OLEDs). The transparent anode is composed of a low-resistivity metal and an oxide semiconductor with a high refractive index. The OLED using the metal anode has almost identical performance to the OLED using ITO. Luminance of the OLED using the metal anode was 10 000 cd/m 2, luminance per current density was 2.5 cd/A at 11 V. Moreover, the OLED using the metal anode showed a lager current density than OLEDs using ITO. It is inferred that a metal anode has superior hole injection into the hole transport layer in comparison with ITO.
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