チラルの2D有機無機ハイブリッドペロブスキート 円形の二極化 波長範囲で調節可能
Jihoon Ahn1, Sunihl Ma1, Ji-Young Kim2
1Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Journal of the American Chemical Society
|February 13, 2020
まとめ
キラル有機無機混合ペロブスキート (chiral OIHP) の化学組成の変化は,円形の二重化 (CD) 信号を調節し,CD活動をオンまたはオフにすることができます. これは,光電子機器のための高度な光学材料の設計を可能にします.
科学分野:
- 材料科学
- 固体化学
- 光電子機器
背景:
- キラル有機無機混合ペロブスキート (chiral OIHP) は独特のキロプティカル特性を有する.
- これらの特性に対する化学組成の影響を理解することは 材料の設計において極めて重要です
研究 の 目的:
- 化学組成の変更がキラルOIHPの光学特性にどのように影響するかを調査する.
- これらの材料における円形二極化 (CD) 信号の調節と制御の方法を探求する.
主な方法:
- クイラルOIHPにおけるブロミドとヨウ素アニオンの混合比を修正する.
- オーガニック・スペーサー・カチオンを変更する (例えば,C12のようなより大きなグループを使用する).
- バンドギャップ,結晶構造,CDスペクトルの変化を分析する.
主要な成果:
- ハライドの比率が変化すると,CD信号は帯域間隔を変化させ,495nmから474nmにシフトした.
- 結晶構造がヨウ素決定体からブロミド決定体へと移行すると,CD信号が消えた.
- より大きな有機スペーサー群を用いると,CD信号はおよそ375nmにシフトした.
結論:
- 化学組成の修正は,カイロプティカル特性を制御する2つの主要な方法を提供します:バンド構造経由でCDの波長をチューニングし,構造変化経由でCDをオン/オフにします.
- これらの発見は,高性能カイロプティック材料の構造工学にとって価値があります.
- 潜在的応用には,スピン偏光発光装置と偏光ベースの光電子学が含まれます.
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