Multilayer structures as stable hole-injecting electrodes for use in high efficiency organic electronic devices
First Claim
1. An array of polymer emissive diodes comprising an active emissive polymer layer having a first side in contact with a patterned cathode and a second side in contact with a patterned transparent anode, the patterning of said anode and cathode defining an array of emissive diodes, wherein a multilayer anode including a first layer comprising a patterned high conductivity inorganic contact layer, a nonpatterned second layer in physical contact with said first layer, said second layer comprising conjugated conductive organic polymer and having a high resistance and a nonpatterned transparent third layer in physical contact with said second layer and with said active emissive polymer layer, said third layer comprising a conductive organic polymer and having a lower resistance than said second layer.
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Abstract
Multilayer anode structures (104) for electronic devices (100) such as polymer light-emitting diodes are described. The multilayer anodes include a high conductivity organic layer (114) adjacent to the photoactive layer (102) and a low conductivity organic layer (112) between the high conductivity organic layer and the anode'"'"'s electrical connection layer (110). This anode structure provides polymer light emitting diodes which exhibit high brightness, high efficiency and long operating lifetime. The multilayer anode structure of this invention provides sufficiently high resistivity to avoid cross-talk in passively addressed pixellated polymer emissive displays; the multilayer anode structure of this invention simultaneously provides long lifetime for pixellated polymer emissive displays.
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Citations
10 Claims
- 1. An array of polymer emissive diodes comprising an active emissive polymer layer having a first side in contact with a patterned cathode and a second side in contact with a patterned transparent anode, the patterning of said anode and cathode defining an array of emissive diodes, wherein a multilayer anode including a first layer comprising a patterned high conductivity inorganic contact layer, a nonpatterned second layer in physical contact with said first layer, said second layer comprising conjugated conductive organic polymer and having a high resistance and a nonpatterned transparent third layer in physical contact with said second layer and with said active emissive polymer layer, said third layer comprising a conductive organic polymer and having a lower resistance than said second layer.
Specification