書誌事項
- タイトル別名
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- Investigation of Negative Charge Storage Mechanism in the Potassium Ion Electret by First-Principle Calculations
- カリウムイオンエレクトレット ニ オケル フデンカチクセキキコウ ノ ダイイチ ゲンリ ケイサン ニ ヨル ケントウ
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<p>A potassium-ion electret, which is a key element of vibration-powered microelectromechanical generators, is a material that permanently stores negative charge. However, the charge storing mechanism of a potassium-ion electret is still unclear. In this study, we theoretically study the atomic and electronic structures of amorphous SiO2 with and without potassium atoms using first-principles molecular-dynamics calculations. As a result of calculations, we confirmed the existence of a fivefold-coordinated Si atom with five Si-O bonds as a characteristic local structure in a-SiO2 with potassium atoms, which is negatively charged. This result indicates that the fivefold-coordinated Si structure is the physical origin of the negative charge observed in potassium-ion electret. Furthermore, we show the guidelines for the experimental observation of the fivefold-coordinated structure and the fabrication of high-reliability potassium-ion electret.</p>
収録刊行物
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- 電気学会論文誌E(センサ・マイクロマシン部門誌)
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電気学会論文誌E(センサ・マイクロマシン部門誌) 141 (8), 292-298, 2021-08-01
一般社団法人 電気学会
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詳細情報 詳細情報について
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- CRID
- 1390851862122541440
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- NII論文ID
- 130008070405
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- NII書誌ID
- AN1052634X
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- ISSN
- 13475525
- 13418939
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- NDL書誌ID
- 031639482
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可