Effects of optical illumination on fatigued lead zirconate titanate capacitors

C. R. Peterson; S. A. Mansour; A. Bement

doi:10.1080/10584589508220227

Effects of optical illumination on fatigued lead zirconate titanate capacitors

C. R. Peterson, S. A. Mansour, A. Bement

Purdue University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

PZT thin films with the composition PbZr0.53Ti0.47O3 were deposited via metallo-organic decomposition (MOD) and rapid thermally processed (RTP) at 725°C and 875°C. A technique using “white” light to photostimulate electrons into unassociated oxygen vacancies was employed to study fatigue mechanisms. We propose that free electrons stimulated by light illumination fill doubly charged oxygen vacancies and restore local charge equilibrium within the material near the PZT/Pt interfaces. The restoration of charge was explained based on changes in the energy band diagram of the PZT/Pt interface due to oxygen vacancy build up. It was found that this restoration of charge resulted in nearly a 50% recovery of lost polarization. Therefore, we conclude that oxygen vacancy migration and subsequent build up at the PZT/Pt interfaces is a likely source of fatigue.

Original language	English
Pages (from-to)	139-147
Number of pages	9
Journal	Integrated Ferroelectrics
Volume	7
Issue number	1-4
DOIs	https://doi.org/10.1080/10584589508220227
Publication status	Published - Feb 1995
Externally published	Yes

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title = "Effects of optical illumination on fatigued lead zirconate titanate capacitors",

abstract = "PZT thin films with the composition PbZr0.53Ti0.47O3 were deposited via metallo-organic decomposition (MOD) and rapid thermally processed (RTP) at 725°C and 875°C. A technique using “white” light to photostimulate electrons into unassociated oxygen vacancies was employed to study fatigue mechanisms. We propose that free electrons stimulated by light illumination fill doubly charged oxygen vacancies and restore local charge equilibrium within the material near the PZT/Pt interfaces. The restoration of charge was explained based on changes in the energy band diagram of the PZT/Pt interface due to oxygen vacancy build up. It was found that this restoration of charge resulted in nearly a 50% recovery of lost polarization. Therefore, we conclude that oxygen vacancy migration and subsequent build up at the PZT/Pt interfaces is a likely source of fatigue.",

author = "Peterson, {C. R.} and Mansour, {S. A.} and A. Bement",

year = "1995",

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AU - Peterson, C. R.

AU - Mansour, S. A.

AU - Bement, A.

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N2 - PZT thin films with the composition PbZr0.53Ti0.47O3 were deposited via metallo-organic decomposition (MOD) and rapid thermally processed (RTP) at 725°C and 875°C. A technique using “white” light to photostimulate electrons into unassociated oxygen vacancies was employed to study fatigue mechanisms. We propose that free electrons stimulated by light illumination fill doubly charged oxygen vacancies and restore local charge equilibrium within the material near the PZT/Pt interfaces. The restoration of charge was explained based on changes in the energy band diagram of the PZT/Pt interface due to oxygen vacancy build up. It was found that this restoration of charge resulted in nearly a 50% recovery of lost polarization. Therefore, we conclude that oxygen vacancy migration and subsequent build up at the PZT/Pt interfaces is a likely source of fatigue.

AB - PZT thin films with the composition PbZr0.53Ti0.47O3 were deposited via metallo-organic decomposition (MOD) and rapid thermally processed (RTP) at 725°C and 875°C. A technique using “white” light to photostimulate electrons into unassociated oxygen vacancies was employed to study fatigue mechanisms. We propose that free electrons stimulated by light illumination fill doubly charged oxygen vacancies and restore local charge equilibrium within the material near the PZT/Pt interfaces. The restoration of charge was explained based on changes in the energy band diagram of the PZT/Pt interface due to oxygen vacancy build up. It was found that this restoration of charge resulted in nearly a 50% recovery of lost polarization. Therefore, we conclude that oxygen vacancy migration and subsequent build up at the PZT/Pt interfaces is a likely source of fatigue.

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Effects of optical illumination on fatigued lead zirconate titanate capacitors

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