JP2023511056A - 光電デバイスに適用可能で、デュアル捕獲機構と超短減衰時間を備えた超蛍光セリウム(iii)含有キレート - Google Patents
光電デバイスに適用可能で、デュアル捕獲機構と超短減衰時間を備えた超蛍光セリウム(iii)含有キレート Download PDFInfo
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Abstract
Description
本発明による蛍光分子Fとの組成物に使用される中性Ceドナーキレートは、Ce(III)中心イオンにより構成される。Ce(III)中心イオンは、8配位、好ましくは9配位又は最大12配位であり、主に有機キレート配位子により配位される。
ここで、
R1 = ピラゾリル、トリアゾリル、ヘテロアリール、アルキル、アリール、アルコキシ、フェノール基、アミノ基、アミド基、これらの基は、置換又は非置換であり、あるいは、特にカルバゾール(Cz)-基、又は1つ若しくは2つのtert-ブチルで置換されたカルバゾール基である。
R2, R3, R4, R6, R7 = H, ハロゲン、又はヘテロ原子を含み得る炭化水素基、特にアルキル、アリール、ヘテロアリール。化合物の揮発性を高めるために、R2-R7は互いに独立にフッ素化することができ、即ち特に少なくとも1つのFを有する。
アクセプター
この化合物は、4つのtert-ブチルを特徴とする。それらは、ドナーとそのアクセプターとの間の空間距離を拡大するために使用され、Deter機構によるアクセプターのT1状態への約1nmの移動半径の短距離エネルギー移動過程を大きく回避する。通常の蛍光分子(TADF分子を除く)の場合、T1状態が放射ではなく遷移禁制により不活化されるため、T1状態を占有すると励起子が失われるので、これは非常に重要である。
実施例 1
実施例2
実施例3
実施例4
Claims (22)
- 以下の式で表される構造を有するか、又は以下の式で表される構造で構成され、
Ce[pz3B(Cz)]3
式中、Czは、カルバゾリル基で、pzは、ピラゾリル基であり、
Czは、互いに独立して、任意の位置で1つ又は2つのtert-ブチルによって置換される、ことを特徴とする請求項1に記載の分子。 - Ce[pz3B(2,7-t-Bu2-Cz)]3、Ce[pz3B(3,6-t-Bu2-Cz)]3又はCe[pz3B(4,5-t-Bu2-Cz)]3で表される構造を有するか、前記構造で構成され、
式中、t-Buは、tert-ブチルである、ことを特徴とする請求項2に記載の分子。 - R2、R3、R4、R6及びR7はそれぞれ、互いに独立して、水素、ハロゲン、又はヘテロ原子含有及び/又は置換若しくは未置換の炭化水素基から選択され、ヘテロ原子は、O、S、N、P、Si、Se、F、Cl、Br及び/又はIから選択される、ことを特徴とする請求項4に記載の分子。
- R2、R3、R4、R6及びR7は、水素又はハロゲンである、ことを特徴とする請求項5に記載の分子。
- 少なくとも1つの重水素を有する、ことを特徴とする請求項1~7のいずれか一項に記載の分子。
- 蛍光アクセプター分子の組成物における中性ドナー分子としての、請求項1~7のいずれか一項に記載の分子の使用。
- 前記中性ドナー分子は、有機配位子と配位する8~12配位のCe(III)中心イオンを有する、ことを特徴とする請求項10に記載の組成物。
- 前記有機配位子は、2配位又は3配位のキレート配位子であり、且つ/又は前記有機配位子の最低の三重項状態は、エネルギーが最低のCe(III)キレートの励起状態よりもエネルギー的に高い、ことを特徴とする請求項11に記載の組成物。
- 前記有機配位子は、一重項励起子と三重項励起子を捕獲するための、1つ又は2つの環を有する芳香族又はヘテロ芳香族環系を有し、最低の配位子励起一重項状態S1(L)及び最低の配位子励起三重項状態T1(L)はいずれも占有され、S1(L)からT1(L)への高速の項間交差が発生し、続いて分子内エネルギーを介してCe(III)中心に迅速に移動する、ことを特徴とする請求項10~12のいずれか一項に記載の組成物。
- 前記蛍光アクセプター分子は、
前記アクセプターの十進モル吸光係数が20,000 Lmol-1cm-1を超え、
半値全幅(FWHM)< 0.25eV、特に< 0.2eVであり、
発光量子収率φPL >70%、特に>90%の発光を有し、
発光減衰時間τ<10ns、特に<2ns、かつ/又は
発光ピークの最大値が、深青色スペクトル領域に対し、420nm~480nmの領域内にある、ことを特徴とする請求項13に記載の組成物。 - 有機発光ダイオード(OLED)、発光電気化学セル(LEEC)、OLEDセンサ、有機発光トランジスタ及び有機レーザーから選択される光電デバイスを製造するための請求項10~14のいずれか一項に記載の組成物の使用。
- 請求項1~9のいずれか一項に記載の分子又は請求項10~14のいずれか一項に記載の組成物を有する光電デバイス。
- 基板と、陽極と、陰極と、少なくとも1つの発光層とを含み、
前記陽極又は前記陰極は前記基板上に設けられ、前記少なくとも1つの発光層は、前記陽極と前記陰極との間に配置され、請求項1~9のいずれか一項に記載の分子又は請求項10~14のいずれか一項に記載の組成物を有する、ことを特徴とする請求項16に記載の光電デバイス。 - 発光層における前記Ce(III)キレートドナー分子の質量ドーピング率は、発光層の99%~10%、特に18%~12%である、ことを特徴とする請求項17に記載の光電デバイス。
- 前記蛍光アクセプター分子の質量ドーピング率は、発光層の0.5%~5%、特に1%である、ことを特徴とする請求項18に記載の光電デバイス。
- 請求項16~19に記載の光電デバイスを製造する方法であって、請求項1~9に記載の分子又は請求項10~14に記載の組成物を使用する、ことを特徴とする方法。
- 光電子デバイスにおけるすべての一重項と三重項励起子を完全に捕獲する方法であって、請求項1~9に記載の分子をCe(III)キレートドナーとして蛍光アクセプターへの非放射エネルギー移動に使用する、ことを特徴とする方法。
- 緑色又は赤色光を発光する蛍光アクセプター分子を使用することにより、寿命が短く、<10ns又は >2nsで、対応するスペクトル領域に対して色純度が高い超蛍光を生成する、ことを特徴とする請求項21に記載の方法。
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DE102020103268.4A DE102020103268B8 (de) | 2020-02-10 | 2020-02-10 | Ce(III)-Komplexe, Zusammensetzung aufweisend Ce(III)-Komplexe, optoelektronische Vorrichtung, Verfahren zu deren Herstellung, Verfahren zum Dublett-Harvesting und Verfahren für Hyperfluoreszenz mit sehr kurzer Abklingzeit |
DE102020103268.4 | 2020-02-10 | ||
PCT/CN2021/072344 WO2021159918A1 (zh) | 2020-02-10 | 2021-01-16 | 可用于光电器件的具有双重捕获机制和超短衰减时间的超荧光含铈(iii)螯合物 |
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