abstract |
Disclosed is a hole injection layer and a charge generation layer containing a trimerindene-based compound. The voltage, efficiency and lifetime of the OLED can be improved by using a tri-indene-based compound in the hole injection layer. In addition, the voltage, efficiency and lifetime of the OLED can be further improved by using a tri-indene-based compound in the P-type charge generation layer in the tandem OLED structure. |