Pyroelectric Properties of PZT(30/70) Thick film Prepared by Sol-Gel Method

Sol-Gel 법으로 제작된 PZT(30/70) 후막의 초전특성

  • 송금석 (인하대학교 전자전기공학부) ;
  • 장동훈 (인하대학교 전자전기공학부) ;
  • 강성준 (여수대학교 반도체·응용물리학과) ;
  • 윤영섭 (인하대학교 전자전기공학부)
  • Published : 2003.07.01

Abstract

PZT(30/70) thick film was fabricated by using 1,3 propanediol-based sol-gel method. Prepared film of pyroelectric property was investigated by Dynamic method of modulation frequency dependence. Pyroelectric coefficient was obtained about 5.0$\times$10$^{-8}$ C/$\textrm{cm}^2$.K. The figure of merits for voltage responsivity and specific detectivity were 3.4$\times$10$^{-11}$ C.cm/J and 5.9$\times$10$^{-9}$ C.cm/J, respectively, because of relative high-dielectric constant and high-pyroelectric coefficient. Voltage responsivity was increased at low modulation frequency and it was decreased at high modulation frequency. Voltage responsivity was maximum 1.84 V/W at 10 Hz. As Johnson noise is dominant, Noise voltage was increased nearly proportional to f$^{-1}$ 2/. Noise equivalent power and specific detectivity were 2.83$\times$10$^{-7}$ W/Hz$^{1}$2/ and 3.13$\times$10$^{5}$ cm.Hz$^{1}$2//W the same frequency at 80 Hz, respectively.

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