Investigation of the Dielectric and Electrical Properties of Poly(chloro‐p‐xylylene) (Parylene‐C) Layers for Controlling Charge Transport in Organic Field‐Effect Transistors

Polymer dielectric‐based organic field‐effect transistors (OFETs) have attracted significant attention due to their potential applications in transparent and flexible electronics, intelligent labels for smart packaging, and chemical and biosensors. Herein, we demonstrate OFETs incorporating poly(chloro‐p‐xylylene) (parylene‐C) as the gate dielectric with variable thickness in the range of 250–450 nm in 50 nm increments, with careful investigation of their electrical characteristics. The results showed that an optimal dielectric thickness of parylene‐C (350 nm) significantly enhanced device performance compared to a standard SiO 2 dielectric, achieving a low threshold voltage (V Th ) (0.23 V), a higher on/off ratio (I on/off ) (7.27 × 10 3 ), and increased hole mobility (µ h ) (1.29 × 10 −2 cm 2 V −1 s −1 ). To understand how the thickness of the parylene‐C dielectric layer influences the performance of OFETs, a variety of analyses were conducted, including capacitance‐voltage and water contact angle measurements, atomic force microscopy, and grazing incidence wide‐angle X‐ray scattering. Furthermore, X‐ray absorption spectroscopy was employed to analyze the electronic structure and molecular orientation of parylene‐C and the PBTTT‐C14 layer deposited on it. This study offers valuable insights for optimizing OFETs with parylene‐C dielectric layers, paving the way for the development of next‐generation flexible and low‐power electronic devices.

• Publication year

  2025

• Venue

  Macromolecular materials and engineering (Print)

• Publication date

  2025-12-03

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1002/mame.202500394
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Reviewing the Correlation of Fish Quality Alteration and In‐Package Headspace Composition: Evidence From a pH Freshness Indicator Case Study

  2025cited by this paper
• Parylene-C-based flexible organic thin-film transistors and their reliability improvement using SU-8 passivation

  2024cited by this paper
• Highly Stable Ladder‐Type Conjugated Polymer Based Organic Electrochemical Transistors for Low Power and Signal Processing‐Free Surface Electromyogram Triggered Robotic Hand Control

  2023cited by this paper
• Disorder‐Controlled Efficient Doping of Conjugated Polymers for High‐Performance Organic Thermoelectrics

  2023cited by this paper
• Flexible Organic Polymer Gas Sensor and System Integration for Smart Packaging

  2023cited by this paper
• Parylene C as a Multipurpose Material for Electronics and Microfluidics

  2023cited by this paper
• Low‐voltage polymer‐dielectric‐based organic field‐effect transistors and applications

  2021cited by this paper
• Highly stable flexible organic field-effect transistors with Parylene-C gate dielectrics on a flexible substrate

  2019cited by this paper
• Recent Progress on High‐Capacitance Polymer Gate Dielectrics for Flexible Low‐Voltage Transistors

  2018cited by this paper
• Organic Transistor-Based Chemical Sensors for Wearable Bioelectronics.

  2018cited by this paper
• Micromachining of Parylene C for bioMEMS

  2016cited by this paper
• Microfiber inclination, crystallinity, and water wettability of microfibrous thin-film substrates of Parylene C in relation to the direction of the monomer vapor during fabrication

  2015cited by this paper
• Backbone orientation in semiconducting polymers

  2015cited by this paper
• Study on the surface energy of graphene by contact angle measurements.

  2014cited by this paper
• Printed Transistors on Paper: Towards Smart Consumer Product Packaging

  2014cited by this paper
• PDT‐S‐T: A New Polymer with Optimized Molecular Conformation for Controlled Aggregation and π–π Stacking and Its Application in Efficient Photovoltaic Devices

  2013cited by this paper
• Microstructure of polycrystalline PBTTT films: domain mapping and structure formation.

  2012cited by this paper
• Effect of film thickness on structural, morphology, dielectric and electrical properties of parylene C films

  2012cited by this paper
• Organic Thin‐Film Transistors for Chemical and Biological Sensing

  2012cited by this paper
• Experimental and theoretical study of AC electrical conduction mechanisms of semicrystalline parylene C thin films.

  2012cited by this paper
• Molecular Characterization of Organic Electronic Films

  2011cited by this paper
• Organic Transistors in Optical Displays and Microelectronic Applications

  2010cited by this paper
• Materials and applications for large area electronics: solution-based approaches.

  2010cited by this paper
• Ultra-thin polymer gate dielectrics for top-gate polymer field-effect transistors

  2009cited by this paper
• Structural and dielectric study of parylene C thin films

  2009cited by this paper
• The Impact of the Dielectric/Semiconductor Interface on Microstructure and Charge Carrier Transport in High-Performance Polythiophene Transistors

  2008cited by this paper
• High Carrier Mobility Polythiophene Thin Films: Structure Determination by Experiment and Theory†

  2007cited by this paper
• Solvent Effects on Chain Orientation and Interchain π‐Interaction in Conjugated Polymer Thin Films: Direct Measurements of the Air and Substrate Interfaces by Near‐Edge X‐ray Absorption Spectroscopy

  2007cited by this paper
• General observation of n-type field-effect behaviour in organic semiconductors

  2005cited by this paper
• Gate Dielectrics for Organic Field‐Effect Transistors: New Opportunities for Organic Electronics

  2005cited by this paper
• Low‐k Insulators as the Choice of Dielectrics in Organic Field‐Effect Transistors

  2003cited by this paper
• Characterization of parylene‐N and parylene‐C photooxidation

  2003cited by this paper
• Two-dimensional charge transport in self-organized, high-mobility conjugated polymers

  1999cited by this paper

• No citing papers are available for this paper.