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<p>Poly(3,4-ethylenedioxythiophene) (PEDOT) is the most widely used material in electronic applications due to its high conductivity, flexibility, good transparency and environmental stability. However, the conductivity of this material is lower than copper, and issues with doping stability result in lower electrical conductivity and breakdown voltage. The present study overcomes the above issues and balances the conductivity and dielectric behaviour of PEDOT with the incorporation of 30, 40 and 50 weight percentages of barium titanate (BaTiO<sub>3</sub>) through <i>in-situ</i> polymerisation associated with the hot pressing technique. The influence of BaTiO<sub>3</sub> concentration on the dielectric behaviour, X-ray diffraction structural behaviour, conductivity and capacitance density of PEDOT film is investigated, and the outcomes are compared with those of the pristine PEDOT film. The results showed enhanced dielectric properties and capacitance performance, making it suitable for capacitor applications. PEDOT with 50 wt% BaTiO<sub>3</sub> achieved a dielectric constant of 230 at 1&#xa0;kHz and a breakdown voltage of 5.8&#xa0;kV<InlineEquation ID="IEq500"> <EquationSource Format="TEX">\(\slash\)</EquationSource> <EquationSource Format="MATHML"><math> <mo stretchy="false">/</mo> </math></EquationSource> </InlineEquation>mm. The lowest dielectric loss of 0.056 was observed with 40 wt% BaTiO<sub>3</sub>. The electrical conductivity was significantly reduced to 140 S<InlineEquation ID="IEq501"> <EquationSource Format="TEX">\(\slash\)</EquationSource> <EquationSource Format="MATHML"><math> <mo stretchy="false">/</mo> </math></EquationSource> </InlineEquation>cm with 40 wt% barium titanate (BaTiO<sub>3</sub>) while increasing the capacitance density, reaching a maximum of 1420 F<InlineEquation ID="IEq502"> <EquationSource Format="TEX">\(\slash\)</EquationSource> <EquationSource Format="MATHML"><math> <mo stretchy="false">/</mo> </math></EquationSource> </InlineEquation>cm<sup>3</sup> at 50 wt% BaTiO<sub>3</sub>. The BaTiO<sub>3</sub> incorporation enhances the crystallinity with a maximum crystalline size of 23&#xa0;nm. The results showed enhancements in dielectric property, capacitance density and crystallinity of PEDOT films.</p>

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Study of balancing dielectric and conductive performance in poly(3,4-ethylenedioxythiophene) capacitors featuring barium titanate

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Madhu Balasubramanian,
  • N Nagabhooshanam,
  • Rintu Kumar,
  • Mamata Chahar,
  • T Sudhakar,
  • N B C S N Murthy,
  • Ramya Maranan,
  • T Thirugnanasambandham,
  • S Sathiyamurthy

摘要

Poly(3,4-ethylenedioxythiophene) (PEDOT) is the most widely used material in electronic applications due to its high conductivity, flexibility, good transparency and environmental stability. However, the conductivity of this material is lower than copper, and issues with doping stability result in lower electrical conductivity and breakdown voltage. The present study overcomes the above issues and balances the conductivity and dielectric behaviour of PEDOT with the incorporation of 30, 40 and 50 weight percentages of barium titanate (BaTiO3) through in-situ polymerisation associated with the hot pressing technique. The influence of BaTiO3 concentration on the dielectric behaviour, X-ray diffraction structural behaviour, conductivity and capacitance density of PEDOT film is investigated, and the outcomes are compared with those of the pristine PEDOT film. The results showed enhanced dielectric properties and capacitance performance, making it suitable for capacitor applications. PEDOT with 50 wt% BaTiO3 achieved a dielectric constant of 230 at 1 kHz and a breakdown voltage of 5.8 kV \(\slash\) / mm. The lowest dielectric loss of 0.056 was observed with 40 wt% BaTiO3. The electrical conductivity was significantly reduced to 140 S \(\slash\) / cm with 40 wt% barium titanate (BaTiO3) while increasing the capacitance density, reaching a maximum of 1420 F \(\slash\) / cm3 at 50 wt% BaTiO3. The BaTiO3 incorporation enhances the crystallinity with a maximum crystalline size of 23 nm. The results showed enhancements in dielectric property, capacitance density and crystallinity of PEDOT films.