Iridium(III) Based Phosphors with Multi-dentate Coordination Chelate

Project: Research

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OLED is one of the most important technology for displays and solid state lighting of the 21st century. There is worldwide excitement among technology enthusiasts regarding the launch of the first iPhone with the OLED panel. However, for this industry as well as the academic sector, people are still searching for better OLED phosphors, particularly the blue-emitting materials, as the efficient blue-emitters are expected reduce power consumption and improve color gamut significantly. So far, both the green and red emitters employed by OLED industries are dominated by the Ir(III) based phosphors, except for the blue-emitting Ir(III) materials due to their poor efficiency and inferior stability.As for the molecular designs, majority of the Ir(III) metal complexes possess three bidentate chelates, which are known to be less robust compared to those with two tridentate chelates, for which the stability is provided by the multi-coordination architecture, i.e. tridentate bonding interaction to the central metal atom. Therefore, development of bis-tridentate Ir(III) complexes (or Ir(III) emitter with multi-dentate coordination chelate) with excellent blue emission may solve the important issues of both color gamut and stability, and thus have great significance in the timeline of OLED technology. In this proposal, we intend to set up the generalized synthetic strategy of the vital deep blue-emitting Ir(III) phosphors with novel bis-tridentate structure (or other suitable design such as 4+2 and 4+1+1 modes) from easily synthesized and modified precursors. Therefore, this study should result in notable impact to OLED industries and academic arena, and accordingly, will be important to Hong Kong in building up her scientific strength of the associate research.


Project number9042681
Grant typeGRF
Effective start/end date1/01/19 → …