In TADF based OLED devices the emitted wavelength is controlled by appropriate selection of dopant (for H-D layers) and D – A molecules (for exciples layer). As suitable electron-acceptor groups; pyridines, phenazines and dibenzothiophene S,S-dioxides, which all potentially will give long device lifetimes will be explores. For the donor compounds, we will study carbazoles, phenothiazines, phenoxazines, acridones and 5H-benzo[b]phosphindoles which should be beneficiary and as yet are little explored. Determine of the optimum D A or H-D pairs for very high efficiency TADF OLEDs will be found and fully characterised.
Dr Data research will address the task of investigation of TADF OLED materials and devices that can replace Ir based phosphor emitters. New D-A systems will be rapidly tested using photophysics to verify optical properties and electrochemistry to determine HOMO, LUMO levels to aid OLED device design and most promising candidate systems will be taken in to device characteristics.
We have identified an initial set of design rules for H-D and D-A TADF materials which will guide synthesis at the outset. We believe that such a well-focused project with very well defined end goals will give Europe a leading position in this very important emerging OLED area.
The aims of the project are:
- Exploring and developing new knowledge of the TADF phenomena
- Develop both H-D and A-D sets of molecules for TADF based OLEDs
- Developing the joint research between ER, UDUR and industry partners
- Development of the professional maturity in research by ER.