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Efficient Persistent Room Temperature Phosphorescence in Organic Amorphous Materials under Ambient Conditions

机译:环境条件下有机非晶材料中的有效持久室温磷光

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摘要

Persistent emission with a long lifetime (>1 s) from organic materials can only be observed at a low temperature, because of the significant nonradia-tive deactivation pathway that occurs at room-temperature (RT). If organic materials with persistent RT emission in air could be developed, they could potentially be utilized for a variety of applications. Here, organic host-guest materials with efficient persistent RT phosphorescence (RTP) are developed by minimizing the nonradiative deactivation pathway of triplet excitons. The nonradiative deactivation pathway is dependent on both nonradiative deactivation of the guest and quenching by diffusional motion of the host. The rigidity and oxygen barrier properties of the steroidal compound used as the host suppressed the quenching, and the aromatic hydrocarbon used as the guest is highly deuterated to minimize nonradiative deactivation of the guest. Red-green-blue persistent RTP with a lifetime >1 s and a quantum yield >10% in air is realized for a pure organic material.
机译:由于在室温(RT)下会发生显着的非放射性失活途径,因此只有在低温下才能观察到有机材料具有长寿命(> 1 s)的持久发射。如果能够开发出在空气中具有持久性RT排放的有机材料,则它们有可能被用于多种应用。在这里,通过最小化三重态激子的非辐射失活途径,开发了具有有效持久性RT磷光(RTP)的有机客体材料。非辐射失活途径既依赖于客体的非辐射失活,也依赖于宿主的扩散运动来猝灭。用作主体的甾族化合物的刚性和氧阻隔性能抑制了淬灭,并且用作客体的芳族烃高度氘化以最小化客体的非辐射失活。对于纯有机材料,可以实现寿命> 1 s,空气中量子产率> 10%的红绿蓝持久RTP。

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  • 来源
    《Advanced Functional Materials》 |2013年第27期|3386-3397|共12页
  • 作者单位

    Department of Polymer Science and Organic Materials Engineering Tokyo Institute of Technology 2-12-1, Meguro, Tokyo 152-8552, Japan;

    Division of Applied Chemistry Graduate School of Engineering Tokyo University of Agriculture and Technology 2-24-16 Naka, Koganei, Tokyo 184-8588, Japan;

    Center for Organic Photonics and Electronics (COPE) and School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive, Atlanta, GA 30332-0400, USA;

    Pure and Applied Chemistry Science and Technology Tokyo University of Science 2641 Yamazaki, Noda, Chiba 278-8510, Japan;

    Institute for Chemical Research Kyoto University Uji, Kyoto 611-0011, Japan;

    Center for Organic Photonics and Electronics (COPE) and School of Chemistry and Biochemistry Georgia Institute of Technology 901 Atlantic Drive, Atlanta, GA 30332-0400, USA;

    Division of Applied Chemistry Graduate School of Engineering Tokyo University of Agriculture and Technology 2-24-16 Naka, Koganei, Tokyo 184-8588, Japan;

    Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka, Nishi, Fukuoka 819-0395, Japan;

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