Highly Sensitive Chemical‐Vapor Sensor Based on Thin‐Film Organic Field‐Effect Transistors with Benzothiadiazole‐Fused‐Tetrathiafulvalene

Yang, Ge; Di, Chong‐an; Zhang, Guanxin; Zhang, Jing; Xiang, Junfeng; Zhang, Deqing; Zhu, Daoben

doi:10.1002/adfm.201202473

Cited by 53 publications

(31 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(1) and (2). Experimental data (points) and theoretical simulations (solid lines) of capacitance and loss exhibit good agreement, as shown in Fig.…”

supporting

confidence: 61%

“…Organic thin film transistors (OTFTs) promise well for the active matrix flat panel display application, logic circuits and sensors. 1,2 The performances of OTFTs are mainly influenced by the properties of semiconductor, 3 insulator, 4 and the interface between semiconductor and insulator. 5 The silicon nitride (SiN x ), which is extensively used as the gate insulator layer in the commercial hydrogenated amorphous silicon TFTs, can be deposited at low temperature.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Improved interfacial and electrical properties of vanadyl-phthalocyanine metal-insulator-semiconductor devices with silicon nitride as gate insulator

Wang

Song

et al. 2013

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…(1) and (2). Experimental data (points) and theoretical simulations (solid lines) of capacitance and loss exhibit good agreement, as shown in Fig.…”

supporting

confidence: 61%

mentioning

confidence: 99%

Improved interfacial and electrical properties of vanadyl-phthalocyanine metal-insulator-semiconductor devices with silicon nitride as gate insulator

Wang

Song

et al. 2013

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…[9][10][11][12][13][14][15][16] The organic semiconductor (OSC) layer is a key factor in achieving high-performance OFET-based chemical sensors. [19][20][21][22][23] In the pre- [19][20][21][22][23] In the pre-…”

Section: Introductionmentioning

confidence: 99%

Porous Organic Field‐Effect Transistors for Enhanced Chemical Sensing Performances

Lü

Liu

Zhou

et al. 2017

Adv Funct Materials

135

143

View full text Add to dashboard Cite

1 of 7) 1700018 vious studies, these optimizations were usually achieved based on continuous and compact OSC thin-films, which actually limited the sensor sensitivity. The sensing response of an OFET-based sensor is usually due to the interactions of analytes with the charge carriers in OSCs conduction channel and the electrodes, such as doping or quenching induced charge carrier density variation, dipole-induced trapping and retarding of charges, and change in charge injection energy barriers. [24][25][26][27][28] These interactions lead to changes in the threshold voltage, charge mobility and output source-drain current. However, the conduction channel of an OFET is usually concentrated within a few molecular layers at the bottom of the semiconductor film, close to the dielectric/semiconductor interface, [29][30][31][32] so that the device structure of conventional OFET-based sensors with continuous and compact OSC thin-films often restricts their sensing performance. Analyte molecules have to diffuse through the organic semiconductor films before they can interact with charge carriers in the conduction channel, [33][34][35] which limits the sensor sensitivity and response speed. Although OFETs based on organic semiconductor nanowire structures have been developed, [36][37][38] the fabrication of those devices requires rather complicated techniques, and the device performances of nanowire OFETs can be quite different from batches to batches, which is not desirable for sensing applications.In this work, we have developed a general strategy with a simple and effective method to overcome this limitation. Our strategy involves incorporating ultrathin porous OSC films into OFET chemical sensors. The ultrathin micro-porous OSC films were fabricated by a versatile template method. The porous OSC structure provides additional and direct pathways for analytes to interact with charge carriers in conduction channel. As a demonstration of this strategy, OFET chemical sensors with ultrathin porous OSC films were tested upon exposure to diluted NH 3 vapors, and showed much higher sensitivity than the pristine OFET with the same OSC thickness. The porous OFET also exhibited higher sensitivity to NH 3 than any previously reported OFET sensors, [39][40][41][42][43][44][45] to the best of our knowledge, along with decent selectivity and stability. This strategy is general and simple, which can be applied to nearly all OFET chemical sensors.The thin-film structures of chemical sensors based on conventional organic field-effect transistors (OFETs) can limit the sensitivity of the devices toward chemical vapors, because charge carriers in OFETs are usually concentrated within a few molecular layers at the bottom of the organic semiconductor (OSC) film near the dielectric/semiconductor interface. Chemical vapor molecules have to diffuse through the OSC films before they can interact with charge carriers in the OFET conduction channel. It has been demonstrated that OFET ammonia sensors with porous OSC films can be fabricated by a si...

show abstract

“…Past decades have witnessed an increasing demand for highly sensitive chemical sensors, as one of the key parts in advanced organic electronics, in environmental monitoring, healthcare, national security, and industrial applications . Therefore, great attention has been paid in improving the output performance of chemical sensors by designing novel structures or selecting highly active materials for trace sensing . Organic semiconductors (OSCs), as a kind of active semiconducting material, have a great potential in detecting a wide range of poisonous and flammable analytes, such as ammonia (NH 3 ), nitrogen dioxide (NO 2 ), and dimethyl methylphosphonate (DMMP), due to the intrinsic environmental sensitivity of the OSCs .…”

Section: Introductionmentioning

confidence: 99%

Self‐assembled core‐shell structured organic nanofibers fabricated by single‐nozzle electrospinning for highly sensitive ammonia sensors

Liu

Shi

Jin

et al. 2019

InfoMat

View full text Add to dashboard Cite

Electrospinning is a unique method to prepare 1‐dimentional nanofiber for large‐scale manufacturing. Here in, we demonstrated chemical sensors based on the semiconducting nanofibers with core‐shell structure by simple single‐nozzle electrospinning with the spontaneous phase separation. The core‐shell structure nanofiber has large active sites which make it highly sensitive to chemical analytes. The thickness of the sensing shell can be tuned by controlling the mass ratio of core and shell components. As a demonstration, the nanofiber‐based sensor exhibits high sensitivity to low‐concentration ammonia (ppb level), as well as stability and reversibility. This unique fast single‐nozzle electrospinning technique used to fabricate semiconducting nanofibers with core‐shell structure provides a facile and designable process for the integration of multifunctional organic semiconducting layer into the organic electronic system.

show abstract

Highly Sensitive Chemical‐Vapor Sensor Based on Thin‐Film Organic Field‐Effect Transistors with Benzothiadiazole‐Fused‐Tetrathiafulvalene

Cited by 53 publications

References 70 publications

Improved interfacial and electrical properties of vanadyl-phthalocyanine metal-insulator-semiconductor devices with silicon nitride as gate insulator

Improved interfacial and electrical properties of vanadyl-phthalocyanine metal-insulator-semiconductor devices with silicon nitride as gate insulator

Porous Organic Field‐Effect Transistors for Enhanced Chemical Sensing Performances

Self‐assembled core‐shell structured organic nanofibers fabricated by single‐nozzle electrospinning for highly sensitive ammonia sensors

Contact Info

Product

Resources

About