Flexible Field-Effect Transistor-Type Sensors Based on Conjugated Molecules

Lee, Yoon Ho; Jang, Moonjeong; Lee, Moo Yeol; Kweon, O. Young; Oh, Joon Hak

doi:10.1016/j.chempr.2017.10.005

Cited by 171 publications

(128 citation statements)

References 117 publications

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“…Herein, we report on a highly selective OFET gas sensor based on high mobility donor–acceptor copolymer (CDT‐BTZ) that can discriminate between multiple isomers (derivatives of xylenes, ketones, and aldehydes) over a wide range of concentrations using only one sensing parameter. OFETs based on conjugated polymers or small molecules are promising sensor platforms because they have various advantages, including high sensitivity, mechanical flexibility, and low‐cost fabrication processes . CDT‐BTZ was used as a semiconductor and an active sensing component in a typical OFET structure of bottom gate/bottom contact.…”

Section: Resultsmentioning

confidence: 99%

Organic Transistor Based on Cyclopentadithiophene‐Benzothiadiazole Donor–Acceptor Copolymer for the Detection and Discrimination between Multiple Structural Isomers

Khatib

Huynh

Sun

et al. 2019

Adv Funct Materials

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Distinguishing structural isomers is a critical and challenging task for biotechnology, chemical industry, and environmental monitoring. Approaches currently available are limited in terms of selectivity and simplicity. In this paper, a highly sensitive organic field-effect transistor (OFET) using the cyclopentadithiophene-benzothiadiazole (CDT-BTZ) copolymers as a semiconductor is presented for easy and selective detection of different families of structural isomers, as well as between different isomers within each family. High accuracy discrimination is achieved over a range of concentrations using only a single sensing parameter derived from the OFET characteristic transfer curve. As a reference, other homopolymer-and donor-acceptor copolymer-based OFET sensors are examined but do not have an equivalent sensing performance to that of the CDT-BTZ-based OFETs. Investigating the link between isomer absorption and swelling, supramolecular order and energy levels of the active layer reveals a unique effect of each isomer on the energy bands of the semiconducting polymer.

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Section: Resultsmentioning

confidence: 99%

Organic Transistor Based on Cyclopentadithiophene‐Benzothiadiazole Donor–Acceptor Copolymer for the Detection and Discrimination between Multiple Structural Isomers

Khatib

Huynh

Sun

et al. 2019

Adv Funct Materials

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“…As an important part of organic electronics, OFETs show great potential applications in organic light-emitting field-effect transistors (LFETs), attachable sensors for health care, logic circuits for radiofrequency identification devices (RFIDs), and so forth. [22][23][24][25] Therefore, OFET has gained much attention and strong support. A series of research projects have been launched, reaching billions of dollars.…”

Section: The Bigger Picturementioning

confidence: 99%

Insight into High-Performance Conjugated Polymers for Organic Field-Effect Transistors

Yang

Zhao

Wang

et al. 2018

Chem

365

320

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Compared with traditional silicon electronics, electronic devices based on organic field-effect transistors (OFETs) offer unique advantages, including mechanical flexibility, solution processability, and tunable optoelectronic properties. During the past several years, impressive advances have been made in OFETs, particularly in conjugated polymer-based FETs. Numerous FETs based on high-performance polymers have been developed thanks to the efforts of material design and device optimization. A remarkable mobility of more than 10 cm 2 V À1 s À1 has been achieved in OFETs, which provides a promising opportunity for applications in flexible displays and wearable devices. This review describes the recent progress of this field from four aspects: basic knowledge, material design strategies, solution-processable techniques, and functional applications of OFETs. In addition, the current challenges and future outlook of this field are briefly discussed.

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“…Very recently, they have been proven capable of detecting biomarkers at the physical limit reaching LODs of 10 −21 m (zeptomolar) with a technology called “Single Molecule with a large Transistor” (SiMoT) . Relevant is also the approach of the organic electrochemical transistors (OECTs) and the OFET‐based biosensors …”

Section: Introductionmentioning

confidence: 99%

Ultimately Sensitive Organic Bioelectronic Transistor Sensors by Materials and Device Structure Design

Picca

Manoli

Macchia

et al. 2019

Adv Funct Materials

117

140

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Organic bioelectronic sensors are gaining momentum as they can combine high-performance sensing level with flexible large-area processable materials. This opens to potentially highly powerful sensing systems for point-of-care health monitoring and diagnostics at low cost. Prominent to detect biochemical recognition events, are electrolyte-gated organic field-effect transistors (EGOFETs) and organic electrochemical transistors (OECTs) as they are easily fabricated and operated. EGOFETs are recently shown to be capable of labelfree single-molecule detections, even in serum. This progress report aims to provide a critical perspective through a selected overview of the literature on both EGOFET and OECT biosensors. Attention is paid to correctly attribute them to the potentiometric and amperometric biosensor categories, which is important to set the right conditions for quantification purposes. Moreover, to deepen the understanding of the sensing mechanisms, with the support of unpublished data, focus is put on two among the most critical aspects, namely, the capacitance interplay and the role of Faradaic currents. The final aim is to provide a rationale of the functional mechanisms encompassing both EGOFET and OECT sensors, to improve materials and devices' designs taking advantage of the processes that enhance the sensing response enabling the extremely highperformance level resulting in ultimate sensitivity, selectivity, and fast response.

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Flexible Field-Effect Transistor-Type Sensors Based on Conjugated Molecules

Cited by 171 publications

References 117 publications

Organic Transistor Based on Cyclopentadithiophene‐Benzothiadiazole Donor–Acceptor Copolymer for the Detection and Discrimination between Multiple Structural Isomers

Organic Transistor Based on Cyclopentadithiophene‐Benzothiadiazole Donor–Acceptor Copolymer for the Detection and Discrimination between Multiple Structural Isomers

Insight into High-Performance Conjugated Polymers for Organic Field-Effect Transistors

Ultimately Sensitive Organic Bioelectronic Transistor Sensors by Materials and Device Structure Design

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