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

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2024-02-21 DOI:10.1016/j.joule.2023.12.006

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

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引用次数: 0

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.

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块体材料居里温度以上的肖特基界面诱导的热释电性

热释电是材料将温度波动转化为电信号的一种特性。铁电材料（如 BaTiO3）经常被应用于热释电设备中。然而，材料在居里温度（Tc）以上的去极化限制了现有铁电基器件的热释电响应。在此，我们提出了一种替代方法，即热释电响应与肖特基界面上产生的内置电场有关。具有肖特基界面的氧化铟锡/BaTiO3/LaNiO3 薄膜在工作温度比块状 BaTiO3 的 Tc（125°C）高 20°C 时表现出良好的热释电性能。薄膜的热释电电流密度为 0.537 μA/cm2，在 150°C 时具有很高的循环稳定性。该热释电薄膜可作为自供电温度传感器工作，温度高于块状 BaTiO3 的 Tc，响应时间为 30 毫秒。这项研究为提高铁电基器件的热释电特性和可靠性提供了一种新策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.