Abstract
Hole injection characteristics have been investigated with various metal anodes such as Ni, Pt, Cu, and Al for the top emission polymer light emitting diodes (PLEDs). Devices were composed of metal anode, Poly(3,4-ethylenedioxythiophene) doped with polystyrene sultponated acid (PEDT:PSS), poly [2-methoxy-5-(2-ethylhexyoxy)-1,4-phenylene-vinylene] (MEH-PPV) and Al cathode. The hole injection from ITO anode has been also investigated for the comparison. The I-V characteristics of the PLEDs with different metal anodes were measured. The work function of the anode was strongly related to the hole injection of the device. The current density of the device with Ni anode with higher work function was higher than that of the device with ITO or Al anode at the same operating voltage. Also O2 plasma treatment improved electrical properties of device with Ni anode.
Original language | English |
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Pages (from-to) | 663-665 |
Number of pages | 3 |
Journal | SID Conference Record of the International Display Research Conference |
State | Published - 2002 |
Event | 22nd International Display Research Conference - Nice, France Duration: 2 Oct 2002 → 4 Oct 2002 |