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Microstructured PVDF Film with Improved Performance as Flexible Infrared Sensor.

Hongjian Guan1, Weizhi Li1, Ruilin Yang1

  • 1State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.

Sensors (Basel, Switzerland)
|April 12, 2022
PubMed
Summary

This study enhances polyvinylidene fluoride (PVDF) flexible infrared sensors by creating microgrooves. This microstructure significantly boosts pyroelectric performance, offering a novel approach for advanced sensor technology.

Keywords:
flexiblemicrostructurepolyvinylidene fluoridepyroelectric infrared detector

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Area of Science:

  • Materials Science
  • Polymer Science
  • Sensor Technology

Background:

  • Polyvinylidene fluoride (PVDF) is a promising material for flexible infrared sensors due to its ferroelectricity, flexibility, and low cost.
  • Improving the pyroelectric performance of PVDF is crucial for enhancing sensor sensitivity and functionality.

Purpose of the Study:

  • To investigate the effect of surface microstructuring on the pyroelectric performance of PVDF films.
  • To develop a method for fabricating microstructured PVDF for improved flexible infrared sensors.

Main Methods:

  • Simulations were used to predict the pyroelectric response of PVDF films with different microstructures (groove, square-pit, sinusoidal).
  • Flexible PVDF samples with optimal groove structures were fabricated using a casting method on patterned molds.
  • Pyroelectric performance was measured to validate simulation predictions.

Main Results:

  • Simulation indicated that microgrooves offer the best pyroelectric enhancement for PVDF films.
  • Fabricated microstructured PVDF films showed a significant improvement in pyroelectric performance.
  • The optimal microstructured PVDF film achieved a 146% improvement in pyroelectric performance, aligning well with simulation results.

Conclusions:

  • Surface microstructuring, particularly using microgrooves, is an effective strategy to enhance the pyroelectric performance of PVDF.
  • This work presents an innovative method for fabricating high-performance flexible infrared sensors based on PVDF.
  • The findings pave the way for advanced pyroelectric polymer-based sensor devices with superior capabilities.