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Studying singlet fission and triplet fusion by magneto-electroluminescence method in singlet-triplet energy-resonant organic light-emitting diodes

机译：磁电致发光方法研究单重态-三重态能量共振有机发光二极管的单重态裂变和三重态聚变

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摘要

Organic light emitting diodes (OLEDs) utilizing a singlet-triplet energy-resonant (E_s ≈2E_T) layer (rubrene) were fabricated to investigate the singlet fission and triplet fusion by the magneto-electroluminescence (MEL) of device from R.T. to 20 K. A large positive MEL (23.5%) was obtained at R.T. due to magnetic-field-suppressed singlet fission. With decreasing temperatures, the MELs changed their signs both at low-field and high-field components because of a gradual decrease in singlet fission simultaneously followed by an increasing triplet fusion, leading to a negative MEL around -7.5% at 20 K. Moreover, transient electroluminescence and MELs from the control devices were used to further confirm the exciton fission and fusion processes in rubrene-based OLEDs. Our findings of MEL may provide a useful pathway to study the microscopic dynamics of excited states in organic optoelectronic devices.
机译：制作了利用单重态-三重态能量共振（E_s≈2E_T）层（钌）的有机发光二极管（OLED），以通过R.T.的装置的磁电致发光（MEL）研究单重态裂变和三重态熔融。至20K。在室温下获得大的正MEL（23.5％）。由于磁场抑制了单重裂变。随着温度降低，MEL在低场和高场分量上均改变了其征兆，因为单线态裂变逐渐降低，同时三线态融合增加，导致20 K下MEL约为-7.5％。来自控制装置的瞬态电致发光和MEL被用于进一步确认基于红re烯的OLED中的激子裂变和融合过程。我们对MEL的发现可能为研究有机光电器件中激发态的微观动力学提供了有用的途径。

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  • 来源
    《Organic Electronics》 |2014年第1期|169-174|共6页
  • 作者

    J.W. Bai; P. Chen; Y.L. Lei; Y. Zhang; Q.M. Zhang; Z.H. Xiong; F. Li;

  • 作者单位

    School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People's Republic of China;

    State Key Lab of Supramolecular Structure and Materials, filin University, 2699 Qianjin Avenue, Changchun 130012, People's Republic of China;

    School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People's Republic of China;

    School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People's Republic of China;

    School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People's Republic of China;

    School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People's Republic of China;

    State Key Lab of Supramolecular Structure and Materials, filin University, 2699 Qianjin Avenue, Changchun 130012, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    OLEDs; Singlet fission; Triplet fusion; Electroluminescence;

    机译：OLED;单重态裂变三重态融合电致发光;

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