Fabrication of OLEDs without photolithography patterning
Organic Electronics(2011)
摘要
We report on a new cost-cutting fabrication process for organic light-emitting diodes (OLEDs), requiring no photolithography patterning for indium-tin-oxide (ITO). We formed the patterned ITO electrodes using a sputtering deposition system. However, sputter-patterned ITO-based OLEDs caused leakage current on the slope of the ITO edges due to spike-like surface. To suppress it, an organic molecule was thermally evaporated as an insulating layer that covers the sputter-patterned ITO edges. Such an insulating organic molecule demands low carrier mobility. We found that the reverse current density of OLEDs based on this scheme was comparable to that of photolithography-patterned ITO-based OLEDs.
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关键词
Organic light-emitting diodes (OLEDs),Photolithography,Leakage current,Sputter
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