Study of lead free ferroelectric films for new solar cells

D. Fasquelle, M. Mascof, J. C. Carru, M. Hikam, Y. Iriani, Bambang Soegijono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We report on the deposition by a sol-gel process of Ba0.8Sr 0.2TiO3 and Ba0.9Sr0.1TiO 3 fikns on platinum coated silicon substrates. X-Ray diffraction patterns show that the films are (111) preferentially oriented. The surface morphology is smooth, without cracks and the grain size is about 50 nm as determined by AFM and SEM. The dielectric constant measured from 102 to 106 Hz decreases slightly and is around 400 at l04 Hz. The losses are constant in a first approximation for a 1.5μm thick BST(80/20) fikn with a value of 0.03 at 10 kHz. The existence of an hysteresis cycle attests that the films, whatever their thickness, are in a ferroelectric state. Pyroelectric coefficients have been determined and the best figure of merit obtained on BST(90/10) at 293K and 10 kHz is of 149 μC/m3/K. The best dielectric and pyroelectric properties (tgδ = 0.006 at IMHz, tunability = 30%, γ = 340 μC/m2/K) were obtained on the 400 nm BST(90/10) fikn. Work is in progress to characterize the piezoelectric and photovoltaic properties of our BST films.

Original languageEnglish
Title of host publicationPipelines 2009
Subtitle of host publicationInfrastructure's Hidden Assets - Proceedings of the Pipelines 2009 Conference
Pages55-62
Number of pages8
DOIs
Publication statusPublished - 20 Nov 2009
EventPipelines 2009 Conference, Pipelines 2009: Infrastructure's Hidden Assets - San Diego, CA, United States
Duration: 15 Aug 200919 Aug 2009

Publication series

NamePipelines 2009: Infrastructure's Hidden Assets - Proceedings of the Pipelines 2009 Conference
Volume360

Conference

ConferencePipelines 2009 Conference, Pipelines 2009: Infrastructure's Hidden Assets
Country/TerritoryUnited States
CitySan Diego, CA
Period15/08/0919/08/09

Keywords

  • BST
  • Dielectric constant
  • Ferroelectric state
  • Losses
  • Pyroelectric coefficient
  • Silicon substrate
  • Sol-gel
  • Solar cell
  • Thin film

Fingerprint

Dive into the research topics of 'Study of lead free ferroelectric films for new solar cells'. Together they form a unique fingerprint.

Cite this