Synthesis and application of thienylene-vinylene-thienylene derivatives for organic field effect transistors and ammonia sensors

Abstract

To explore the influence of intermolecular interaction force on the performance of the sensor, a serial of organic semiconductor materials based on thienylene-vinylene-thienylene (TVT) derivatives were synthesized and characterized. X-Ray diffraction measurement of the single crystals of these TVT derivatives show relatively loose herringbone packing structure. Thin film transistors (TFT) based on the TVT derivatives were constructed and showed highest mobility up to 0.69 cm2V−1s−1 for TVT-NA. These OFET decives were further used as gas sensor and the TVT-BF demonstrates good sensitivity and selectivity for detection of ammonia (NH3) gas. The differences in sensing performance is consistent with the simulation calculation results of interactions force between the TVT derivatives and NH3. These general approach demonstrates that noncovalent interaction could greatly affect its sensor capability and offer a new thought for design of high perofrmance gas sensing materials.