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High-quality CVD graphene is used instead of ITO as a transparent electrode in OLEDs. Apart from the limitations on performance due to transmittance and conductivity several device fabrication steps were modified, removed or added. The differences in the procedures to remove defects and impurities, encapsulation and the structuring of the active area of the OLED device is described.

The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP (www.fep.fraunhofer.de) is located in Dresden/Germany and focuses on developing innovative solutions, technologies and processes for surface modification and organic electronics. Along with strong experience in electron beam and plasma technology Fraunhofer FEP is the leading independent applied R&D service provider which combines organic electronics technology with silicon CMOS integrated circuitry (IC) design and process integration. Its aim is to transfer the results of R&D in the field of combined silicon-organic micro-electronic devices towards production by focusing on specific process development, components, system integration and applications based on OLED-on-Silicon technology. Therefore we are continuously seeking partners to further develop and commercialize recent achievements and topics, such as unique OLED microdisplay architectures, large-area OLED microdisplays for VR, ultra-low power/low-latency and 'bi-directional' micro-displays combining image display with embedded image sensing for AR, or micro-patterning for improved power efficiency and color of RGB OLED displays. Beyond that the technology and design expertise also becomes applied to opto-electronic sensor solutions making use of silicon-CMOS-based and/or organic photodetectors (OPD) and embedded illumination for interactive optical fingerprint or surface topology imaging sensors, single-chip reflection light barriers, optical sensors requiring embedded illumination (such as slope, stray light, wave front sensors), lab-on-chip modules with embedded microfluidics, or bio- and environmental monitoring.