Project Idea

The proposed TADFORCE research programme goes well beyond the current state-of-the-art of materials for OLED devices. Although there are a number of initiatives on OLAE and for typical OLED devices the potential of TADF has not been investigated in a similar setting, nor has it been exploited by industry yet. However, the interest of this industry, as demonstrated by the participation of some of the key market players, clearly shows that the exploitation of TADF has a huge commercial potential.

The key innovative aspects and research that goes beyond state of the art can be summarized as follows:

  1. Providing complete understanding of the TADF mechanism to enable predictive design of new TADF systems
  2. Elucidation of the fundamental properties of exciplexes and intra molecular charge transfer
  3. Using the above knowledge to design high efficiency deep blue to red TADF emitters
  4. Designing optimum OLED architectures to fully exploit TADF emitters
  5. Understanding lifetime issues in TADF OLEDs to demonstrate the potential of long device lifetime
  6. Transferring this knowledge to European Industry that is an a key position to exploit that knowledge
  7. Train a highly motivated ER (Dr Data) in all the disciplines required to become a true European expert in TADF materials

Two-way transfer of knowledge

Two-way transfer of knowledge in this project has a number of overall objectives. These are:

  • For the Experienced Researcher to gain new knowledge in triplet harvesting in OLEDs through a personalised training programme within the host organisation and to bring knowledge in synthesis and electrochemical analysis of OLED materials to Durham and the United Kingdom.
  • To enable the Experienced Researcher to reach and re-enforce a position of professional maturity in research by enhancing the knowledge and skills of the Experienced Researcher
  • To further advance the state of the art in high efficiency OLEDs in Europe.
  • To disseminate the outcomes of the project to the international community and contribute to leadership in this field at Durham University and in the United Kingdom and Europe.
  • To develop long lasting and productive collaborative relationships within Europe, specifically between Poland and the United Kingdom, thus contributing to strategic cooperation with Poland.

The Dr Data will gain new knowledge from the UDUR through training in area of photophysics and solid matter physics by investigation of a CT-based and exciplex emitters by time resolved spectroscopy i.e. fluorescence lifetime and delayed fluorescence measurements along with nano/micro second photoinduced absorption. Dr Data will also learn how to fabricate devices by thermal evaporation using our Lesker Spectros OLED evaporator system and he will learn how to determine the most efficient structures. He will test devices along with device modelling using SETFOS software. Finally he will gain a knowledge of the roll of emitter orientation on the light outcoupling from a device and he will be characterise that using ellipsometry and angular dependent emission to verify the true maximum device efficiency.

Dr. Przemyslaw Data specialization is in area of organic and physical chemistry and electrochemistry. We are happy to gain benefit from his knowledge of electrochemistry as a tool for determination of IP and EA energies of molecules to aid device design, as well as his knowledge of Electrochemical Impedance Spectroscopy which is a useful tool for determination of charge mobility in organic molecules. Additional benefit in this project as a member of our laboratory group will be his knowledge of determination of charge carrier properties as well as evaluation of singlet triplet intersystem crossing using ESR spectroscopy, activities not available in the UDur group