Thiophene-phenylene oligomer semiconductors (structures below) have many favorable attributes for electronics on flexible and rounded substrates. They are synthesized in 2–3 steps from readily available starting materials and are chemically stable. Their mobilities are typically above 0.01 cm2/Vs and their threshold voltages can be tuned by altering the thiophene-phenylene ratio. Deposition from solution is facile, and cast films with usable mobilities are repeatedly obtained on a variety of surfaces. Higher-order function such as nonvolatile memory and chemical sensitivity have been demonstrated.
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Katz, H.E., Someya, T., Gelperin, A. et al. Organic Transistor Sensors and Memory Elements Fabricated VIA Solution Deposition. MRS Online Proceedings Library 761, 47 (2002). https://doi.org/10.1557/PROC-761-D4.7