Single-molecular white organic emitters that can utilise both thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) are highly desirable for applications in white light-emitting diodes (WOLEDs) and down-converting light-emitting diodes (WLEDs). However, most reported RTP and TADF compounds only emit one colour, and the few examples of single-molecular white RTP and TADF emitters have low photoluminescence quantum yields, poor colour quality or complex structures that limit their practical use. The aim of HELIOS is to develop efficient single-molecular white emitters for WLEDs or WOLEDs. Our single-molecular white emitters will be based on two new types of molecular systems without rare earth complexes systems that RTP and systems that enable TADF.
Project funding:
EU Research and Innovation Funding Programme “Horizon Europe”
Project results:
We expect to achieve high luminescence efficiency and colour-tunable emission from our novel single-molecular white emitters, which will have great potential for lighting applications. The best emitters will be selected to fabricate WLED or WOLED demonstrator devices. To demonstrate the exploratory research’s overall goal has been achieved, organic single-molecular white emitters will be developed and tested in WOLEDs that meet or exceed the colour rendering index of 85 and energy efficacy of 80 lm/W.
Period of project implementation: 2024-10-01 - 2027-09-30
Project coordinator: Lviv Polytechnic National University
Project partners: Kaunas University of Technology, Intelligentsia Consultants Sarl, RIGA TECHNICAL UNIVERSITY
