Organic heterostructures for electronic and photonic devices

Abstract The successful fabrication of organic semiconductor devices for both electronic and photonic applications is discussed. Complex layer sequences of various organic semiconductor thin films, different metallizations, and indium tin oxide layers can be grown by means of the organic molecular beam deposition (OMBD) technique. Organic-on-inorganic heterostructure diodes based on crystalline thin PTCDA (3,4,9,10,-perylenetetracarboxylic dianhydride) films on III–V-semiconductors are investigated with regard to microwave applications. The optimization of the device structure for reduced forward voltages and high cutoff frequencies in the GHz regime is discussed, and a single balanced mixer with improved frequency conversion at low power levels is shown. Secondly, organic light emitting diodes (OLED) with bright emission in the blue, green, and red spectral region and with low operation voltages are presented. Embedding emissive organic thin films into planar Fabry-Perot microcavities light intensity enhancement, spectral narrowing, and spatial redistribution of the emission is achieved. Finally a 5×7 pixel organic matrix display is introduced.