redTADF · redTADF
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2018-04-01 → 2020-03-31
- EU contribution
- €183,455
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
redTADF
Lighting accounts for ca. 20% of worldwide electricity consumption. By switching towards more energy-efficient lighting technologies a considerable amount of energy would be saved. Organic Light-Emitting Diodes (OLEDs) have been championed as a technology that can replace conventional inefficient lighting. With respect to the fluorescent tube, OLEDs are cheaper, mercury-free, have much cooler operational surface temperatures (30°C as opposed to 90°C), use less power, have a lower risk of fire and open up new avenues for product design (transparent lighting panels and luminescent wallpapers). The main advantage of using thermally activated delayed fluorescence (TADF) emitters is that they are significantly cheaper to make and are far more sustainable a material than organometallic phosphors. Recently, significant progress has been made with blue and green TADF OLEDs, with device EQEmax exceeding 30%. Unfortunately, the performance of red TADF OLED devices (λEL > 600 nm; Commission Internationale de L’Éclairage, CIE, of x ≥ 0.60, y ≤ 0.40) are still suboptimal due to the low EQEs (<13%) and the significant energy roll offs. Indeed, only a handful of examples of red TADF emitters have been reported. It is now of paramount importance that attention is focussed towards the development of high-performance red TADF OLEDs. The major focus of this research proposal is to develop high-performance red TADF dyes. These emitters will be used as principal components in white-light OLEDs
Data: CORDIS, © European Union
Project objective
Adachis pioneering report in 2012 describing TADF emitters based on CDCBs resulted in a paradigm shift in emitter design within the OLED community. Within just five years, highly efficient blue and green purely organic TADF OLEDs have been developed, achieving maximum EQEs exceeding 30%. This means that performance wise, organic TADF emitters have already surpassed the performance of state-of-the-art phosphorescent molecules. However, to date only a handful of red organic TADF emitters exist, with the best EQE reported to date being just 13%, demonstrating a need for continued improvement. European companies such as CDT, Merck, and Cynora are all investing significantly in organic TADF research. The development of high performance organic redTADF emitters will significantly reduce the cost of OLED production and make the devices more environmentally friendly through replacement of the iridium emitters that are currently employed. We propose to develop new highly efficient redTADF dyes based on the ring-contracted systems of subphthalocyanine and subporphyrin.
Original text from CORDIS.
Participants
- THE UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS · ST ANDREWSCoordinatorUnited Kingdom
Links
Data: CORDIS, © European Union