Improving the flexibility of large-area transparent conductive oxide electrodes on polymer substrates for flexible organic light emitting diodes by introducing surface roughness.

Highlights: [•] We formed groove patterns on the surface of a polymer substrate by hot-pressing Teflon. [•] The patterned substrate surface was reflected on the ITO film surface. [•] ITO bending reliability was significantly improved due to the increased surface area. [•] Flexible OLED on the ITO with surface grooves was successfully fabricated. [Copyright &y& Elsevier]