Abstract
We demonstrate a high efficiency top-emitting polymer light-emittingdiode (TPLED) with chromium (Cr) taking as the anode. The TPLEDstructure is Cr/poly-3, 4-ethylenedioxythiophene (PEDOT:PSS)/poly[2-(4-3′,7′-dimethyloctyloxy)-phenyl]-p-phenylenevinylene)(P-PPV)/Ba/Ag. The Cr (100 nm) anode is prepared by sputter-depositingin a vacuum chamber. It is found that the device emissive propertiesare affected dramatically by the thickness of both PEDOT:PSS and the Agcathode. Optimized thicknesses of PEDOT:PSS and Ag layer are 60 nm and15 nm, respectively. The diode exhibits excellent electroluminescence(EL) properties, such as a turn-on voltage of 3.32 V, luminousefficiency of 4.41 cd/A and luminance of 6989 cd/m2 at drivingvoltage of about 9 V.
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