Flexible Top Emission Organic Light Emitting Diodes with Ni and Au Anodes Deposited on a Cellulose Paper Substrate

Cellulose paper was prepared and utilized as a substrate for flexible top emission organic light-emitting diodes (TE-OLEDs). We successfully fabricated flexible TE-OLEDs with Ni and Au anodes on SiO2/cellulose paper substrate. The SiO2 barrier layer coated on the cellulose paper substrate enhanced the surface roughness of the cellulose paper substrate. The surfaces of 100nm thick Ni and Au films on SiO2/cellulose paper substrate become continuous on the SiO2/cellulose paper substrate, resulting in low sheet resistance of the Ni and Au films. While the maximum luminance of the flexible TE-OLED with Au anode was about 3516 cd/m(2) at a driving voltage of 12V, that of the flexible TE-OLEDs with Ni anode was 1280 cd/m(2) at a driving voltage of 10V.