三次元鉛ブロミドハイブリッド・フェロエレクトリック 格子膨張により実現
Yuan-Yuan Tang1, Yu-Hua Liu1, Hang Peng1
1Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China.
Journal of the American Chemical Society
|November 6, 2020
まとめ
研究者は,高キュリー温度518Kの新しい3D鉛ハリドフェロエレクトリック (EATMP) Pb2Br6を開発しました.この発見は,3Dの機能的な有機-無機ハイブリッド材料を前進させます.
科学分野:
- 材料科学
- 固体化学
- クリスタルグラフィー
背景:
- 三次元 (3D) 有機無機鉛ハリド混合物は,多様な用途を持つ機能的な材料です.
- 3D鉛ハリドハイブリッドフェロエレクトリックは希少で,その技術的可能性を制限しています.
- 既存のフェロエレクトリックは,実用的な使用のために望ましいより低い動作温度を持っています.
研究 の 目的:
- 鉛ハリドペロブスキットに関連する新しい3Dの鉄電気材料を合成し,特徴づけること.
- 新しい化合物の構造,光学,および鉄電学的性質を調査する.
- 高性能の3D有機-無機ハイブリッドの設計戦略を探求する.
主な方法:
- X線微分法による結晶構造の決定
- 非鉄電 CH3NH3PbBr3の基本的な構成単位を変更することによって (EATMP) Pb2Br6を合成する.
- 光学バンドギャップとキュリー温度 (Tc) の測定
主要な成果:
- 新しい3D鉛ハリドペロブスキートアナログ (EATMP) Pb2Br6が成功して合成されました.
- (EATMP) Pb2Br6は,2.81 eVの直接帯域間隔と4つの極化方向を示しています.
- この材料のキュリー温度 (Tc) は518Kで,3D有機と無機のハイブリッド・フェロエレクトリックでは最高です.
結論:
- (EATMP) Pb2Br6の構造は,新しい3D有機-無機鉛ハリド混合物への効果的な経路を示しています.
- 非常に高いTcは,高温のフェロ電気アプリケーションの可能性を示唆しています.
- この研究は,強化された特性を持つ3D鉛ハリドフェロエレクトリックのさらなる研究を奨励します.
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