Intermolecular Interaction-Induced Thermally Activated Delayed Fluorescence Based on a Thiochromone Derivative

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Jianjun Liu
  • Taiping Hu
  • Zhiyi Li
  • Xiaofang Wei
  • Xiaoxiao Hu
  • Honglei Gao
  • Guanhao Liu
  • Yuanping Yi
  • Yukiko Yamada-Takamura
  • Pengfei Wang
  • Ying Wang

Detail(s)

Original languageEnglish
Pages (from-to)1888-1893
Journal / PublicationJournal of Physical Chemistry Letters
Volume10
Issue number8
Early online date2 Apr 2019
Publication statusPublished - 18 Apr 2019

Abstract

Exploration of new extrinsic ways to modulate thermally activated delayed fluorescence (TADF) to achieve high exciton utilization efficiency in organic light-emitting diodes (OLEDs) is highly desirable. A new thiochromone derivative 2,3-bis(4-(9H-carbazol-9-yl)phenyl)-4H-thiochromen-4-1,1-dioxide (THI-PhCz) with tunable photophysical properties from crystals to amorphous states is reported. THI-PhCz shows molecular-packing-dependent TADF in different aggregation states based on the differences of intermolecular interactions. Furthermore, it is observed that THI-PhCz doped in amorphous films of different hosts also shows host-dependent TADF with a short delay lifetime (108 ns), which is interpreted as the effect of host-guest intermolecular interaction on the 3CT state except for the effect on the 1CT state in reported references. This work provides a new perspective for generation of TADF by tuning intermolecular interactions in crystals and amorphous films except for molecular design, which is expected to contribute in achieving low-efficiency roll-off OLEDs with effective exciton utilization efficiency.

Citation Format(s)

Intermolecular Interaction-Induced Thermally Activated Delayed Fluorescence Based on a Thiochromone Derivative. / Liu, Jianjun; Hu, Taiping; Li, Zhiyi; Wei, Xiaofang; Hu, Xiaoxiao; Gao, Honglei; Liu, Guanhao; Yi, Yuanping; Yamada-Takamura, Yukiko; Lee, Chun-Sing; Wang, Pengfei; Wang, Ying.

In: Journal of Physical Chemistry Letters, Vol. 10, No. 8, 18.04.2019, p. 1888-1893.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review