Pyroelectricity induced by Schottky interface above the Curie temperature of bulk materials

Hongyu Li; Chris R. Bowen; Huiyu Dan; Ya Yang

doi:10.1016/j.joule.2023.12.006

Pyroelectricity induced by Schottky interface above the Curie temperature of bulk materials

Hongyu Li, Chris R. Bowen, Huiyu Dan, Ya Yang

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

6 Citations (SciVal)

Abstract

Pyroelectricity is a characteristic property of materials that converts temperature fluctuations into electric signals. Ferroelectric materials, such as BaTiO₃, are frequently applied in pyroelectric devices. However, the depolarization of the material above the Curie temperature (T_c) restricts the pyroelectric response of existing ferroelectric-based devices. Here, we propose an alternative approach where the pyroelectric response relates to the built-in electric field generated at a Schottky interface. The indium tin oxide/BaTiO₃/LaNiO₃ film with a Schottky interface exhibits good pyroelectric performance when the operating temperature is ∼20°C higher than the T_c (125°C) of bulk BaTiO₃. The film exhibits a pyroelectric current density of 0.537 μA/cm² and a high cyclic stability at 150°C. The pyroelectric film can operate as a self-powered temperature sensor above the T_c of bulk BaTiO₃, with a response time of 30 ms. This study provides a new strategy to enhance the pyroelectric properties and reliability of ferroelectric-based devices.

Original language	English
Pages (from-to)	401-415
Number of pages	15
Journal	Joule
Volume	8
Issue number	2
Early online date	8 Jan 2024
DOIs	https://doi.org/10.1016/j.joule.2023.12.006
Publication status	Published - 21 Feb 2024

Data Availability Statement

The data supporting the conclusions and findings are provided in the article and supplemental information. Additional data are available from the lead contact, Ya Yang ([email protected]), upon request.

Funding

This work was supported by the National Natural Science Foundation of China (grant no. 52072041 ), the Beijing Natural Science Foundation (grant no. JQ21007 ), and the University of Chinese Academy of Sciences (grant no. Y8540XX2D2 ).

Funders	Funder number
National Natural Science Foundation of China	52072041
Natural Science Foundation of Beijing Municipality	JQ21007
University of the Chinese Academy of Sciences	Y8540XX2D2

Keywords

Curie temperature
ferroelectric depolarization
pyroelectric
Schottky junction

ASJC Scopus subject areas

General Energy

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10.1016/j.joule.2023.12.006

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title = "Pyroelectricity induced by Schottky interface above the Curie temperature of bulk materials",

abstract = "Pyroelectricity is a characteristic property of materials that converts temperature fluctuations into electric signals. Ferroelectric materials, such as BaTiO3, are frequently applied in pyroelectric devices. However, the depolarization of the material above the Curie temperature (Tc) restricts the pyroelectric response of existing ferroelectric-based devices. Here, we propose an alternative approach where the pyroelectric response relates to the built-in electric field generated at a Schottky interface. The indium tin oxide/BaTiO3/LaNiO3 film with a Schottky interface exhibits good pyroelectric performance when the operating temperature is ∼20°C higher than the Tc (125°C) of bulk BaTiO3. The film exhibits a pyroelectric current density of 0.537 μA/cm2 and a high cyclic stability at 150°C. The pyroelectric film can operate as a self-powered temperature sensor above the Tc of bulk BaTiO3, with a response time of 30 ms. This study provides a new strategy to enhance the pyroelectric properties and reliability of ferroelectric-based devices.",

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author = "Hongyu Li and Bowen, {Chris R.} and Huiyu Dan and Ya Yang",

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T1 - Pyroelectricity induced by Schottky interface above the Curie temperature of bulk materials

AU - Li, Hongyu

AU - Bowen, Chris R.

AU - Dan, Huiyu

AU - Yang, Ya

PY - 2024/2/21

Y1 - 2024/2/21

N2 - Pyroelectricity is a characteristic property of materials that converts temperature fluctuations into electric signals. Ferroelectric materials, such as BaTiO3, are frequently applied in pyroelectric devices. However, the depolarization of the material above the Curie temperature (Tc) restricts the pyroelectric response of existing ferroelectric-based devices. Here, we propose an alternative approach where the pyroelectric response relates to the built-in electric field generated at a Schottky interface. The indium tin oxide/BaTiO3/LaNiO3 film with a Schottky interface exhibits good pyroelectric performance when the operating temperature is ∼20°C higher than the Tc (125°C) of bulk BaTiO3. The film exhibits a pyroelectric current density of 0.537 μA/cm2 and a high cyclic stability at 150°C. The pyroelectric film can operate as a self-powered temperature sensor above the Tc of bulk BaTiO3, with a response time of 30 ms. This study provides a new strategy to enhance the pyroelectric properties and reliability of ferroelectric-based devices.

AB - Pyroelectricity is a characteristic property of materials that converts temperature fluctuations into electric signals. Ferroelectric materials, such as BaTiO3, are frequently applied in pyroelectric devices. However, the depolarization of the material above the Curie temperature (Tc) restricts the pyroelectric response of existing ferroelectric-based devices. Here, we propose an alternative approach where the pyroelectric response relates to the built-in electric field generated at a Schottky interface. The indium tin oxide/BaTiO3/LaNiO3 film with a Schottky interface exhibits good pyroelectric performance when the operating temperature is ∼20°C higher than the Tc (125°C) of bulk BaTiO3. The film exhibits a pyroelectric current density of 0.537 μA/cm2 and a high cyclic stability at 150°C. The pyroelectric film can operate as a self-powered temperature sensor above the Tc of bulk BaTiO3, with a response time of 30 ms. This study provides a new strategy to enhance the pyroelectric properties and reliability of ferroelectric-based devices.

KW - Curie temperature

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Pyroelectricity induced by Schottky interface above the Curie temperature of bulk materials

Abstract

Data Availability Statement

Funding

Keywords

ASJC Scopus subject areas

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