Development of High-Performance N-type OECTs with Small Molecule OMIECs

Organic electrochemical transistors (OECTs) are promising candidates for biosensing applications due to their efficient ion-electron coupling, high transconductance, and operational stability in aqueous environments. Yet conventional polymer-based conductors (OMIECs) are limited by batch-to-batch variations and restricted design flexibility. To address these challenges, we propose organic small molecules as a highly tunable alternative. Free from the synthetic constraints of polymerization, small molecules offer well-defined
structures that permit precise, atomistic engineering. This versatility enables the fine-tuning of orbital energy levels and the facile integration of functional moieties to maximize ion-electron coupling. In this study, we investigate these molecular advantages and demonstrate that rationally designed n-type small molecule
OMIECs deliver robust and highly efficient device performance.