Abstract
Three ladder linear 5,7,12,14-tetraazapentacenes (1–3) have been synthesized by an improved condensation reaction with high yields. These tetraazapentacenes show higher thermal and optical stability in solution and solid films compared to pentacene. Organic thin film transistors (OTFTs) based on amorphous films of 5,7,12,14-tetraazapentacene are investigated in this contribution. A field-effect mobility of a stable amorphous OTFT in air up to 2 × 10−2 cm2 V−1 s−1 has been achieved. The high stability and high mobility in the amorphous state of ladder compounds 1–3 combined with the easy synthesis make them a new family of promising candidate for organic electronic devices.
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