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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene
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Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene

机译：6,13-双（三异丙基甲酰基乙炔基）五烯酮裂变产生的长寿命三重胶囊的超快动态

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摘要

Singlet fission (SF) converts a singlet exciton into two triplet excitons and holds great potential in the photovoltaic field. The triplet pair state is proposed to play an important role in SF. However, the existence and character of the triplet pair state are still ambiguous to date. In this study, we directly observed the ultrafast formation of the long-lived bound triplet pair state in 6,13-bis(triisopropylsilylethynyl) pentacene polycrystalline film using sub-10-fs broadband transient absorption spectroscopy. The triplet pair state has strong absorption in the near-infrared region and shows distinct dynamic characteristics. It shows faster formation and relaxation compared to free triplet states. Diffusion-limited triplet-triplet annihilation was proved to be the major relaxation channel for both free triplets and bound triplet pairs. Moreover, the larger constraint coefficient obtained from triplet-triplet annihilation of the bound triplet pair state reveals the inherent coupling nature between its two constituent triplets.
机译：单峰裂变（SF）单线态激子转换为两个三重态激子并保持在光伏领域的巨大潜力。三重对状态提出了SF中发挥了重要的作用。然而，存在和三重对状态的字符仍然不明确的是最新的。在这项研究中，我们直接使用子10-FS宽带瞬态吸收光谱观察到6,13-​​双（三异丙）并五苯的多晶膜中的长寿命三重态结合的一对状态的超快形成。三重一对状态具有在近红外区域和节目不同动态特性的强吸收。这表明相比于免费三重态更快的形成和放松。有限扩散三重态湮灭被证明是两个免费三胞胎和结合三联对的大事放宽通道。此外，从结合三重对状态的三重态 - 三重态湮灭获得较大的约束系数揭示了其两个组成三联之间固有的耦合性质。

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  • 作者

    Zhou Zilin; Ma Lin; Guo Deqiang; Zhao Xin; Wang Cheng; Lin Dabin; Zhang Fangteng; Zhang Jiahua; Nie Zhaogang;

  • 作者单位

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

    Chinese Acad Sci CIOMP State Key Lab Luminescence &

    Applicat Changchun 130033 Peoples R China;

    Guangdong Univ Technol Sch Phys &

    Optoelect Engn Guangzhou 510006 Peoples R China;

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  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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