Amorphous-nanocrystalline lead titanate thin films for dielectric energy storage

Elizabeth K. Michael, Susan E. Trolier-McKinstry

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Many high permittivity crystalline dielectric thin films have a low breakdown strength, which is unfavorable for dielectric energy storage devices. In contrast, many amorphous linear dielectrics have much lower permittivities but larger breakdown strengths. Here, composite thin films with nanocrystalline particles in an amorphous matrix were explored to increase the stored energy density of dielectrics. For this purpose, thin films of lead-rich lead titanate, Pb1.1TiO3.1, were fabricated via chemical solution deposition and heat-treated at temperatures ≤400°C. Transmission electron microscopy indicated the presence of dense lead oxide nanocrystals in an amorphous lead titanate network. The films exhibit a relative permittivity of 32.6 and a low dielectric loss of 0.0008. The leakage current is approximately 10-8A/cm2, with a DC breakdown strength between 2 and 3MV/cm. The 1 kHz breakdown strength exceeds 5MV/cm. At an electric field of 5MV/cm and a measurement frequency of 1 kHz, the maximum in energy storage density was ~28 J/cm3. These properties suggest that nanocomposite Pb1.1TiO3.1 films may be a suitable candidate for integration into energy storage devices.

Original languageEnglish (US)
Pages (from-to)250-255
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume122
Issue number1424
DOIs
StatePublished - Jan 1 2014

Fingerprint

energy storage
Energy storage
Permittivity
Lead
breakdown
Thin films
permittivity
thin films
Lead oxide
Nanocomposite films
Dielectric films
Composite films
Dielectric losses
lead oxides
Leakage currents
Nanocrystals
frequency measurement
Electric fields
dielectric loss
Crystalline materials

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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abstract = "Many high permittivity crystalline dielectric thin films have a low breakdown strength, which is unfavorable for dielectric energy storage devices. In contrast, many amorphous linear dielectrics have much lower permittivities but larger breakdown strengths. Here, composite thin films with nanocrystalline particles in an amorphous matrix were explored to increase the stored energy density of dielectrics. For this purpose, thin films of lead-rich lead titanate, Pb1.1TiO3.1, were fabricated via chemical solution deposition and heat-treated at temperatures ≤400°C. Transmission electron microscopy indicated the presence of dense lead oxide nanocrystals in an amorphous lead titanate network. The films exhibit a relative permittivity of 32.6 and a low dielectric loss of 0.0008. The leakage current is approximately 10-8A/cm2, with a DC breakdown strength between 2 and 3MV/cm. The 1 kHz breakdown strength exceeds 5MV/cm. At an electric field of 5MV/cm and a measurement frequency of 1 kHz, the maximum in energy storage density was ~28 J/cm3. These properties suggest that nanocomposite Pb1.1TiO3.1 films may be a suitable candidate for integration into energy storage devices.",
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Amorphous-nanocrystalline lead titanate thin films for dielectric energy storage. / Michael, Elizabeth K.; Trolier-McKinstry, Susan E.

In: Journal of the Ceramic Society of Japan, Vol. 122, No. 1424, 01.01.2014, p. 250-255.

Research output: Contribution to journalArticle

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