High-Performance Organic Electrochemical Transistor Based on Photo-annealed Plasmonic Gold Nanoparticle-Doped PEDOT:PSS

Abstract

Organic electrochemical transistors (OECTs), particularly the ones based on PEDOT:PSS, are excellent candidates for chemical and biological sensing because of their unique advantages. Improving the sensitivity and stability of OECTs is crucially important for practical applications. Herein, the transconductance of OECT is improved by 8-fold to 14.9 mS by doping the PEDOT:PSS channel with plasmonic gold nanoparticles (AuNPs) using a solution-based process followed by photo annealing. In addition, the OECT also possesses high flexibility and cyclic stability. It is revealed that the doping of AuNPs increases the conductivity of PEDOT:PSS and the photo annealing improves the crystallinity of the PEDOT:PSS channel and the interaction between AuNPs and PEDOT:PSS. These changes lead to the increase in transconductance and cyclic stability. The prepared OECTs are also demonstrated to be effective in sensitive detection of glucose within a wide concentration range of 10 nM−1 mM. Our OECTs based on photo-annealed plasmonic AuNP-doped PEDOT:PSS may find great applications in chemical and biological sensing, and this strategy may be extended to prepare many other high-performance OECT-based devices.

A laser-induced graphene-based flexible and all-carbon organic electrochemical transistor

“…4 Importantly, OECTs are compatible with solutions, making them particularly advantageous in chemical and biological sensing. [5][6][7] In addition, OECTs can operate stably at a low voltage (e.g. o1 V).…”

Assessment of the Testing Methods for Evaluating the Performance of Organic Electrochemical Transistors

“…Organic electrochemical transistors (OECTs) have attracted great attention in the fields of biosensing and bioelectronics because of their simple structure, low working voltage (<1 V), and high biocompatibility. − OECTs have been used not only for the detection of biomarkers, such as glucose, − dopamine, , and DNA, but also for pressure sensing − and artificial synapses. − Many measurements have been used to evaluate the performance of OECTs. , The output curve measures the output current from source to drain electrodes at a fixed gate voltage while varying the source-drain voltage. The transfer curve measures the current from the source to drain electrodes at a fixed source-drain voltage while varying the gate voltage.…”

A high-performance organic electrochemical transistor based on foam-structured channels prepared using a template washing-off method

“…Because of its high sensitivity and low working voltage, organic electrochemical transistors (OECTs) are becoming promising devices for sensitive detection of chemical and biological analytes. [1][2][3] A typical OECT consists of source, drain, and gate electrodes, among which the source and drain electrodes are connected by organic semiconductor channels. 1 During operation, the ions in the electrolyte can effectively dope the semiconductor channel under a suitable bias applied on the gate electrode, resulting in doping or de-doping of the channel.…”