Performance Investigation of Organic Thin Film Transistor on Varying Thickness of Semiconductor Material: An Experimentally Verified Simulation Study

Jain, Shalini; Joshi, Amit M.; Bharti, Deepak

doi:10.1134/s106378262011010x

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…2 shows the process of fabrication of the proposed biosensor. The steps involved in making an OTFT have been described in detail by several researchers [27], [31], [32]. The DMBETC-OTFT-based biosensor can be fabricated using the same methods as traditional nanogap OTFT biosensors.…”

Section: Fabrication Process Flowmentioning

confidence: 99%

Dielectric Modulated Bilayer Electrode Top Contact OTFT for Label Free Biosensing

2023

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In this paper, dielectric modulated bilayer electrodes top contact organic field effect transistor (DMBETC-OTFT) is investigated as a biosensing device for label-free detection of biomolecules. The nanocavity used for biomolecule detection is created by etching the oxide in a conventional OTFT device. Neutral and charged biomolecules can be detected by the proposed device using their respective dielectric constants and charge densities. Subthreshold swing (SS), on-current (I ON ), and on-off current ratio (I ON /I OF F ) are the main biosensing performance characteristics computed and compared for different gate work function (φ m ) and cavity thickness (T gap ) for the proposed biosensor device. The change in drain current (I D ), as well as the I ON /I OF F ratio, have both been calculated to investigate the sensitivity of the proposed biosensor. The influence of the gate work function is also investigated to improve the sensitivity of the proposed device. According to the finding of this study, using a gate work function with a lower value results in a significant increase in sensitivity. For charged biomolecules (Q f = +1 × 10 12 cm −2 ) with dielectric constant of biomoecules (K = 12), the highest drain current sensitivity is 4.5 × 10 3 . The drain current sensitivity achieved is four times greater, when comparing the proposed device to the latest published work of metal controlled dielectric modulated OTFT-based sensor. The proposed device also has a high I ON /I OF F sensitivity of 4.60 × 10 2 when V GS = -3.0 V and V DS = -1.5 V. In light of its high sensitivity, low cost, and bio-compatibility, the DMBETC-OTFT biosensor holds great promise for the advancement of new demanding flexible biosensing applications.

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Section: Fabrication Process Flowmentioning

confidence: 99%

Dielectric Modulated Bilayer Electrode Top Contact OTFT for Label Free Biosensing

2023

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“…3 depicts the fabrication process flow of proposed biosensor. Several researchers have described the flow of the OTFT fabrication process [43], [46], [47]. The fabrication of DMTCBE-OTFT biosensor can be done with same techniques as nanogap conventional OTFT biosensors.…”

Section: Device Structurementioning

confidence: 99%

Label-Free Detection of Biomolecules Using Dielectric-Modulated Top Contact Bi-layer Electrodes Organic Thin Film Transistor

Joshi¹

2022

Preprint

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<p>The dielectric-modulated top contact bi-layer electrodes organic thin-film transistor (DMTCBE-OTFT) based sensor is proposed to reduce the cost and complexity of nanoscale device fabrication for label-free biomolecule detection. In the proposed structure, a cavity is carved in gate dielectric and filled with biomolecules to realise the function of the sensor. The immobilisation of biomolecules in the cavity region alters the performance parameters like on-current (ION), on-off current ratio (ION/IOFF ), and subthreshold swing (SS) of the proposed device. We have also investigated the effects of gate work-function and cavity thickness on the sensitivity of a DMTCBE-OTFT based biosensor. A bi-layer electrodes is also used for a significant reduction in barrier height to enhance the performance of the proposed device. The change in the on-current (ION) and on-off current ratio (ION/IOFF ) has been utilised to evaluate the sensitivity of the DMTCBE-OTFT for biomolecule recognition. It has different dielectric constants and corresponding charge densities using 2-D simulation when biomolecules are immobilised in the cavity area. The ATLAS TCAD tool is used to investigate the sensitivity performance of the DMTCBE-OTFT. The proposed DMTCBEOTFT has almost four times higher drain current sensitivity in comparison to the recently reported OTFT-based biosensors for label-free detection of biomolecules. The DMTCBE-OTFT biosensor has enormous potential for future flexible biosensing applications due to its good sensitivity, flexibility, low cost, and biocompatibility.</p>

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“…Over the last couple of decades, OTFTs have been used for a broad variety of purposes, including inexpensive displays, organic memory, important radio frequency tags, polymer circuits, and sensors [1][2][3][4]. For practical, commercial uses, threshold voltage, mobility, transconductance, and current in the device provide the biggest challenge for organic devices [5].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of OTFT with varying semiconductor film thickness for future flexible electronics

Jain,

Joshi,

Kirpalani

2024

JOBM

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The goal of this study was to get a deeper understanding of the intricate impact of organic semiconductor thickness on the performance of devices, using a thorough and meticulous investigation at the microscopic level incorporating the density of defect model using using Silvaco ATLAS TCAD Simulator. The present work thoroughly investigates the relationship between the thickness of semiconductors and important performance parameters, such as hole concentration, electric potential, electric field, and Hole QFL. The comprehensive insights derived from this research not only enhance the comprehension of device physics but also provide a framework for the systematic enhancement of electronic devices. The widespread use of organic thin film transistors (OTFT) in future Flexible electronics, particularly in display and memory circuits, necessitates the incorporation of low voltage, high speed, and low cost characteristics.

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Performance Investigation of Organic Thin Film Transistor on Varying Thickness of Semiconductor Material: An Experimentally Verified Simulation Study

Cited by 10 publications

References 21 publications

Dielectric Modulated Bilayer Electrode Top Contact OTFT for Label Free Biosensing

Dielectric Modulated Bilayer Electrode Top Contact OTFT for Label Free Biosensing

Label-Free Detection of Biomolecules Using Dielectric-Modulated Top Contact Bi-layer Electrodes Organic Thin Film Transistor

Performance analysis of OTFT with varying semiconductor film thickness for future flexible electronics

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