可視から近赤外線へのダウンシフトのためのインジウムリン酸量子ドットによるランタノイド放出のブロードバンド感受化
Joseph K Swabeck1,2, Stefan Fischer1,2, Noah D Bronstein1,2
1Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.
Journal of the American Chemical Society
|June 21, 2018
まとめ
研究者は,新しいInP/ランタニドフッ化物/フッ化物 (InP/LnxY1−xF3/ShF3) ナノ結晶を合成した. これらの量子ドットは 広範な吸収と 鋭い近赤外線放射を 提供し これまでの合成の課題を 克服しています
科学分野:
- 材料科学
- ナノテクノロジー
- 写真化学
背景:
- 半導体量子ドット (QD) は,ランタニドイオンで感知され,調節可能な光放出に有望である.
- このようなハイブリッド材料を 効率的なエネルギー転送で合成するのは 難しいことでした
研究 の 目的:
- コア/シェル/シェルのInP/LnxY1−xF3/ShF3ナノ結晶の最初の合成を報告する.
- これらの新しい構造で,広い可視吸収と鋭い近赤外線放射を証明する.
- QDとランタニドイオン間のエネルギー転送メカニズムを調査する.
主な方法:
- InP/LnxY1−xF3/ShF3コア/シェル/シェルのナノ結晶の合成 (Ln = Yb, Nd; Sh = Lu, Y).
- 電子顕微鏡とX線技術を用いた特徴付け.
- 吸収スペクトルと放射スペクトルを含む光学測定
主要な成果:
- ユニークなコア/シェル/シェルのナノ結晶構造の成功合成
- 鋭い近赤外線放射と結合した広い可視吸収の実証.
- QD吸収器に結合したネオジミウム (Nd) の最初の報告
- QDからランタニドイオンへのエネルギー移転の確認,トラップ状態の放出によって示唆される.
結論:
- 開発されたInP/ランタニドフッ化物/フッ化物ナノ結晶は,効率的なルミノフォールへの有望な経路を提供します.
- この研究は,QDランタニドシステムのエネルギー転送メカニズムに関する洞察を提供します.
- この研究は,高度な光学材料の開発のための新しい道を開きます.
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