Novel TADF materials and device architectures to enhance the performance of OLED (2019 - 2021)

Principal investigators from three sides:

  • Latvia: Aivars Vembris, Institute of Solid State Physics, University of Latvia
  • Lithuania: Saulius Grigalevicius, Department of Polymer Chemistry and Technology, Kaunas University of Technology
  • Taiwan: Jwo-Huei Jou, Department of Materials Science and Engineering, National Tsing Hua University

Organic light emitting diode (OLED) has lately become increasingly promising for being a superior technology for both high-quality display and lighting owing to its numerous disruptive advantages, such as plane light, soft, human- and environmental-friendly, energy-saving, low driving voltage, low temperature operable, color-temperature tunable, ease of molecular design, wide- viewing-angle, fast response, high contrast, flexible, and printable. Despite these interesting features in OLED technology and its potential, it has been a challenge to bring OLED technology to the consumer market particularly in lighting applications due to its fabrication cost associated with involvement of rare-earth element containing organic molecules.

To keep in mind the above challenge, the objectives of the project are the synthesis of new organic molecules based on thermally activated delayed fluorescence (TADF) principle and design of highly efficient OLED structure. By employment of TADF material, we will devise innovative OLED device architecture enabling high power efficiency, longer lifetime, and high light quality. The ultimate goals of this project are to develop OLED devices with a power efficiency ≥ 180 lm/W, a lifetime ≥ 60,000 hours and a spectrum resemblance index (SRI) ≥ 90.