効率的なCsPbBr3ナノ結晶ベースの発光ダイオードのための光発光運動を調節するCe3+-ドーピング
Ji-Song Yao, Jing Ge, Bo-Ning Han1
1MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China.
Journal of the American Chemical Society
|January 18, 2018
まとめ
無機ペロブスキートCsPbBr3ナノ結晶をCe3+イオンでドーピングすると,光を発する性質が著しく向上する. この改良により,より明るく,より効率的な発光ダイオード (LED) が作られます.
科学分野:
- 材料科学
- ナノテクノロジー
- 固体物理学
背景:
- 非有機ペロブスキートCsPbBr3ナノ結晶 (NCs) は,高い色純度と熱安定性により,LEDの効率的な光放出体として有望である.
- 高い光学/電気発光効率を達成することは,実際のLEDアプリケーションにとって極めて重要です.
研究 の 目的:
- CsPbBr3NCの光学/電気発光効率を高めるため
- CsPbBr3NCの光学特性に対する異質Ce3+イオンドーピングの影響を調査する.
主な方法:
- Ce3+ドーピングされたCsPbBr3NCを合成するために,容易な熱注入法を使用した.
- ドーピング効果を分析するために,超高速の一時的吸収と時間解像度光発光 (PL) スペクトロスコーピーを用いた.
主要な成果:
- Ce3+ドーピングは,CsPbBr3NCの光発光量 (PLQY) を89%に増加させ,ドーピングされていないNCの2倍に改善した.
- Ce3+ドーピングされたCsPbBr3NCを使用したLEDデバイスは,外部量子効率 (EQE) が1.6%から4.4%に上昇した電解光度が改善されました.
結論:
- 構造的整合性を損なうことなく,CsPbBr3NCの発光効率を高めるための効果的な戦略です.
- Ce3+ドーピングされたCsPbBr3NCは,高性能発光ダイオードの開発に有望な経路を提供します.
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