Intermolecular Interaction Induced Thermally Activated Delayed Fluorescence Based on Thiochromone Derivative.

08:00 EDT 2nd April 2019 | BioPortfolio

Summary of "Intermolecular Interaction Induced Thermally Activated Delayed Fluorescence Based on Thiochromone Derivative."

Exploration of new extrinsic ways to modulate thermally activated delayed fluorescence (TADF) for achieving high exciton utilization efficiency in organic light-emitting diodes (OLEDs) is highly desirable. A newly 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 show host-dependent TADF with a short delay lifetime (108 ns), which is interpreted as the effect of host-guest intermolecular interaction on 3CT state except for the effect on 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.


Journal Details

This article was published in the following journal.

Name: The journal of physical chemistry letters
ISSN: 1948-7185


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