Giant pyroelectricity via doping and interface engineering

Chong Guo

doi:10.1016/j.joule.2024.09.009

2024-12-01

PRE

DOI：10.1016/j.joule.2024.09.009

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热释电效应在能量收集和传感中发挥着关键作用。高热释电系数是优化热释电材料的核心。高热释电系数不仅能提升能量转换效率和信号分辨率，还能促进器件小型化和成本降低。然而，热释电系数通常低于1,000 μC/m²K。在此，我们实现了铅镁铌酸铅-钛酸铅（PMNT）单晶在室温下热释电系数的14倍提升，达到8,194 μC/m²K。这种提升可归因于掺杂和界面工程的协同策略，该策略能够耦合本征热释电性和界面热释电性。此外，掺杂通过改变畴结构和极化分别贡献于本征热释电性，而界面工程则通过引入极性对称性贡献于界面热释电性。这一协同策略为设计高性能热释电材料提供了框架，适用于热电池、红外传感器和医疗成像设备等应用。

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SINGLE-CRYSTALS

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MERIT

期刊

Joule

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35.4

论文数:

2.3K

被引数:

4.5W

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