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13 September 2012 Transparent composite electrode for high-efficiency polymer LEDs
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Abstract
Polymer composite electrodes based on silver nanowires or carbon nanotubes have been prepared with transparency and surface conductivity approaching those of ITO/glass and better than ITO/PET. The conductive surface has an average roughness less than 10 nm, better than ITO/glass. Depending on the polymer matrix selected, the composite electrodes can be made rigid, flexible like polycarbonate, or stretchable like a rubber. Various polymer light emitting diodes,light emitting electrochemical cells and polymer solar cells have been fabricated using the composite electrode as anode, exhibiting electroluminescent efficiencies generally higher than control devices fabricated on ITO/glass. These polymer light emitting devices are all highly flexible and can be bent to less than 3 mm radius without loss of performance. With further modification of the composite electrodes, we have also demonstrated stretchable OLEDs wherein the emissive area can be elongated by as much as 50%.
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Lu Li, Zhibin Yu, Jiajie Liang, Chia-Hao Chang, Weili Hu, and Qibing Pei "Transparent composite electrode for high-efficiency polymer LEDs", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84760T (13 September 2012); https://doi.org/10.1117/12.927426
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