Review of recent advances and sensing mechanisms in solid-state organic thin-film transistor (OTFT) sensors

Abstract

Organic thin-film transistors (OTFTs) have shown great potential as chemical and biological sensors for applications in environmental monitoring and diagnostics with high sensitivities and part-per-billion molar concentration limits of detection....

Additive engineering for high-performance polythiophene gas sensors incorporating functional amine additive with strong binding energy for NO2

“…3d). 12,38,39 With the incremental addition of DETA, the current level increased; in particular, P3HT with 10 wt% DETA exhibited the highest current level. Gas permeation was hindered in the P3HT film with a DETA concentration exceeding 20 wt%, resulting in a lower current level compared to that of the 10 wt% counterpart because of the precipitation of P3HT by the non-solvent additive, as confirmed in the optical microscope (OM) images (Fig.…”

“…4). 38 With the incremental addition of amine functional groups up to 10 wt% DETA, the drain current increased. For all the target gases, P3HT with 10 wt% DETA presented the highest drain current.…”

Organic Thin Film Transistor-Based Cannabinoid Sensors

“…OTFTs have shown promise as low-cost, disposable, and mechanically robust sensors for a variety of applications, including gas sensing, chemical sensing, biosensing, and electronic skin. 11 One of the most promising organic semiconductor families are the metal phthalocyanines (MPc, Figure 1) due to their exceptional optoelectronic properties, high thermal and photochemical stability, and ability to be easily synthesized and functionalized for specific applications. They have shown great potential in a variety of electronic devices such as photovoltaics, 12,13 OTFTs, 14,15 organic light-emitting diodes, and are also being investigated for their potential in sensing and catalytic applications.…”

“…The molecular structure, crystallinity, and film quality of the organic semiconductor layer play a significant role in determining the device’s performance, such as the field-effect mobility (μ) and threshold voltage ( V T ). OTFTs have shown promise as low-cost, disposable, and mechanically robust sensors for a variety of applications, including gas sensing, chemical sensing, biosensing, and electronic skin …”

High-performance organic thin-film transistors: principles and strategies

“…11–13 Various functional electronic devices, including integrated circuits (ICs), flash memories, neuromorphic devices, and sensors, have been developed based on OTFT technology. 14…”