Pyroelectric properties of sol-gel derived lanthanum modified lead titanate thin films

Kwangsoo No, Chaun Gi Choi, Dae Sung Yoon, Tae Hyun Sung, Yong Chun Kim, In Seop Jeong, Won Jong Lee

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Lanthanum-modified lead titanate (PLT) thin films were fabricated on Pt/Ti/SiO2/Si substrate using the sol-gel method and rapid thermal annealing technique. The pyroelectric coefficient, and the infrared responsivity and the detectivity of the films were measured using static and dynamic methods, respectively. The ferroelectric properties were also measured. The pyroelectric coefficient increased from 1.3 to 2.5 nC/cm2·K with increasing La content. However, these low coefficients of PLT films are due to their crystal quality and orientations. The infrared response properties of PLT films depended on their thermal time constants. τt (thermal time constant) for the PLT films decreased with the La contents increasing. The effects of back surface etching on the responsivity and the detectivity were also discussed.

Original languageEnglish
Pages (from-to)2731-2733
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume35
Issue number5 SUPPL. A
DOIs
Publication statusPublished - 1996 May

Keywords

  • Back surface etching
  • Detectivity
  • PLT thin film
  • Pyroelectric coefficient
  • Sol-gel process

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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