2D perovskite nanosheets with thermally-stable high-κ response: a new platform for high-temperature capacitors.
2D perovskite nanosheets with thermally-stable high-κ response: a new platform for high-temperature capacitors.
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DOI：
10.1021/am506629g
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发表时间：
2014-11
影响因子：
9.5
通讯作者：
Yoonhyun Kim;Hyung-jun Kim;M. Osada;B. Li;Y. Ebina;T. Sasaki
中科院分区：
文献类型：
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作者：
Yoonhyun Kim;Hyung-jun Kim;M. Osada;B. Li;Y. Ebina;T. Sasaki
我们研究了高κ钙钛矿纳米片（Ca2Nb3O10）的高温介电响应，这是后石墨烯技术和超大规模电子器件的重要材料平台。通过使用原子力显微镜进行原位表征，我们发现即使单层形式（~2 nm）的 Ca2Nb3O10 纳米片也具有强大的高温特性。此外，层层组装的纳米电容器在高达250°C的高温下保留了无尺寸的高εr特性（∼200）和高绝缘电阻（∼1×10(-7) A/cm2）。同时提高高κ纳米电介质的εr和热稳定性具有至关重要的技术重要性，钙钛矿纳米片在合理设计和构造高温电容器方面具有巨大潜力。
We investigated high-temperature dielectric responses of high-κ perovskite nanosheet (Ca2Nb3O10), an important material platform for postgraphene technology and ultrascale electronic devices. Through in situ characterizations using conducting atomic force microscopy, we found a robust high-temperature property of Ca2Nb3O10 nanosheet even in a monolayer form (∼2 nm). Furthermore, layer-by-layer assembled nanocapacitors retained both size-free high-εr characteristic (∼200) and high insulation resistance (∼1×10(-7) A/cm2) at high temperatures up to 250 °C. The simultaneous improvement of εr and thermal stability in high-κ nanodielectrics is of critical technological importance, and perovskite nanosheet has great potential for a rational design and construction of high-temperature capacitors.