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<p>Ferroelectric materials are highly promising for dielectric properties in the field of flexible printed electronics as varactors due to their non-linear behavior. For the utilization in flexible films, composite inks consisting of ceramics and polymers are of great interest with BST/P(VDF-TrFE) being one of the promising choices. Herein, we are developing printable inks and studying the influence of ferroelectric ceramics (BST) and ferroelectric polymers (P(VDF-TrFE)) as well as non-ferroelectric ceramics (Al<sub>2</sub>O<sub>3</sub>) and non-ferroelectric polymers (PMMA). We were able to fabricate fully inkjet-printed BST/P(VDF-TrFE), BST/PMMA and Al<sub>2</sub>O<sub>3</sub>/P(VDF-TrFE) varactors with dielectric layer thicknesses between 1.24 and 1.70&#xa0;μm. Dielectric investigations show that BST/P(VDF-TrFE) greatly outperforms the other systems and reaches a maximum tunability of 12.80% @40 V with a high Q factor of 27.7.</p>

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Inkjet printed tunable BST/P(VDF-TrFE) dielectrics on polymeric substrates for varactor applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月23日

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  • T. P. Mach,
  • L. Huang,
  • N. R. MD Ashif,
  • U. Gengenbach,
  • J. R. Binder

摘要

Ferroelectric materials are highly promising for dielectric properties in the field of flexible printed electronics as varactors due to their non-linear behavior. For the utilization in flexible films, composite inks consisting of ceramics and polymers are of great interest with BST/P(VDF-TrFE) being one of the promising choices. Herein, we are developing printable inks and studying the influence of ferroelectric ceramics (BST) and ferroelectric polymers (P(VDF-TrFE)) as well as non-ferroelectric ceramics (Al2O3) and non-ferroelectric polymers (PMMA). We were able to fabricate fully inkjet-printed BST/P(VDF-TrFE), BST/PMMA and Al2O3/P(VDF-TrFE) varactors with dielectric layer thicknesses between 1.24 and 1.70 μm. Dielectric investigations show that BST/P(VDF-TrFE) greatly outperforms the other systems and reaches a maximum tunability of 12.80% @40 V with a high Q factor of 27.7.