Thermally Activated Delayed Fluorescence in Commercially Available Materials for Solution-Process Exciplex OLEDs

Area of Science:

• Materials Science
• Organic Electronics
• Photophysics

Background:

• Organic light-emitting diodes (OLEDs) are advancing rapidly.
• Thermally activated delayed fluorescence (TADF) molecules enhance exciton collection efficiency from 25% to 100%.
• Solution processing offers a cost-effective alternative for OLED manufacturing.

Purpose of the Study:

• To develop commercial exciplex host materials for high-performance, solution-processed OLEDs.
• To investigate the TADF properties of specific donor-acceptor combinations.
• To achieve efficient and low-cost OLEDs using commercially available compounds.

Main Methods:

• Utilized established donor molecules: TAPC, PVK, NPB, and Poly-TPD.
• Employed POT2T as the acceptor molecule.
• Synthesized and characterized exciplex systems for TADF properties.

Main Results:

• Achieved excellent TADF properties in the selected donor-acceptor systems.
• Demonstrated high-efficiency exciplex OLEDs.
• Observed low turn-on voltage and high luminance in fabricated devices.

Conclusions:

• Simple combinations of commercial donor and acceptor materials can yield excellent TADF properties.
• High-performance, solution-processed OLEDs are attainable using readily available compounds.
• This approach facilitates the development of cost-effective and efficient OLED technologies.