A 三次元分子ペロブスキット・フェロエレクトリック: (3-アモニオピロリジニウム) RbBr3
Qiang Pan1, Zhi-Bo Liu1, Yuan-Yuan Tang1
1Ordered Matter Science Research Center and ‡Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, P. R. China.
Journal of the American Chemical Society
|March 2, 2017
まとめ
研究者らは新しい3D分子ペロブスキートフェロエレクトリック (3-アンモニオピロリジニウム) RbBr3 [(AP) RbBr3]を開発した. この材料は空前の室温のフェロ電気性を示し,先進的な電子アプリケーションのための新しい道を開きます.
科学分野:
- 材料科学
- 固体物理学
- クリスタルグラフィー
背景:
- CH3NH3PbI3のような 分子ペロブスキート構造は 太陽光装置に 有望ですが 3D版は稀です
- 既存の分子フェロエレクトリックは通常1Dまたは2Dであり,実用的なアプリケーションを制限しています.
- 3D分子ペロブスキットの電鉄特性改善は,技術的進歩に不可欠です.
研究 の 目的:
- 新しい3D分子ペロブスキート・フェロエレクトリックを 合成し特徴づけること
- キュリー温度と極化逆転を含むフェロ電気的性質を調査する.
- この新しい材料の潜在的応用を探求する.
主な方法:
- (3-アンモニオピロリジニウム) RbBr3 [(AP) RbBr3]単一結晶の合成
- X線微分と介電測定などの技術を用いた特徴付け.
- 熱安定性と極化スイッチダイナミクスの評価
主要な成果:
- 高キュリー温度 (Tc = 440 K) を有する3D分子ペロブスキートフェロ電気 (AP) RbBr3の発見.
- 3D分子ペロブスキットで空前の室温上の鉄電性を実証した.
- 高熱安定性,超高速の極化逆転 (> 20 kHz),および多軸特性についての観察.
結論:
- 合成された (AP) RbBr3は,有意な可能性を持つ最初の3D分子ペロブスキート・フェロエレクトリックを表しています.
- この発見は,分子フェロ電気ペロブスキットの設計と合成のための新しい経路を提供します.
- コンポーネントの調節性 (金属イオン,ハロゲンイオン,有機カチオン) は制御された材料設計を可能にします.
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