非常に厚い有機発光ダイオードによる高性能
Toshinori Matsushima1,2,3, Fatima Bencheikh4,5, Takeshi Komino4,5,6
1Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan. tmatusim@opera.kyushu-u.ac.jp.
Nature
|July 31, 2019
まとめ
研究者たちはペロブスキート輸送層を用いて より厚い有機発光ダイオード (OLED) を開発した. このイノベーションにより 次世代のディスプレイと照明の生産量とデバイスの品質が向上します
科学分野:
- 材料科学
- オーガニック電子
- ペロブスキートの用途
背景:
- 有機発光ダイオード (OLED) は,有機層の厚さが均一でないため,大面積の生産で課題に直面し,シャントリング経路と収穫量の減少につながります.
- 厚い有機輸送層は,基板の覆いを改善しますが,低電荷キャリアの移動性のために運転電圧を増加させます.
- 化学ドーピングや有機単結晶のような現在の方法には,効率が低下したり,大量生産には不可能なことなど,限界があります.
研究 の 目的:
- 厚いOLEDを製造する際の限界を克服し,生産率と性能を向上させる.
- 効率や電圧の要求を損なうことなく,より厚いデバイスの製造を可能にする輸送層の代替材料を探求する.
主な方法:
- メチルアモニウム鉛塩化物 (CH3NH3PbCl3) のペロブスキットを輸送層として使用した非常に厚いOLEDの製造.
- 可視スペクトルのキャリアモビリティと光学的透明性のためのペロブスキート膜の特性.
主要な成果:
- 標準OLEDの10倍以上の厚さを持つペロブスキート輸送層を成功裏に製造しました.
- MAPbCl3フィルムで高いキャリアモビリティと可視光透明性を達成した.
- 低駆動電圧,高内部電光量子効率,および厚さ増加にもかかわらず,動作の耐久性を維持します.
結論:
- オーガニック・インオーガニック・ペロブスキットMAPbCl3は,厚いOLED輸送層を製造するための有機材料の有効な代替品です.
- このアプローチはOLEDの生産量と品質を大幅に向上させ,先進的なディスプレイと照明の道を開きます.
- この発見は レーザーや太陽電池やセンサーなどの 他の有機電子機器にも 幅広い意味合いがあります
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