The development of new materials with near-infrared emission (NIR, 700 – 1000 nm) represent an important target in the technological progress of innovative active components for OLED devices (including flexible ones), surveillance systems, autonomous driving, night vision sensors, fiber optic telecommunications and medical systems. In all these fields it still lacks a commercial NIR-OLED technology.
With the present invention we propose patented phosphorescent organometallic compounds (versatile materials useful for these purposes due to their excellent optical properties and thermal and chemical stability) with highly efficient NIR emission and synthesizable in large-scale; we proved their suitability in optoelectronics developing a laboratory tested NIR-OLED prototype; a further use of these materials is in the fields of sensors and as NIR biological probes.
The present technology exploits new organometallic complexes of Iridium and Platinum patented by the group, the method of preparation and their application in NIR-OLED.
Advantages: 1) New class of patented complexes with efficient phosphorescence between 700-900 nm, excellent quantum yields of 10-15% and good thermal stability. 2) Reproducible and scalable synthetic procedures (gram scale preps). 3) The chemical structures are highly modulable and modifiable, allowing to obtain new derivatives in the future. 4) Easy processability for NIR-OLED production with solution deposition techniques (spin-coating, inkjet and roll-to-roll) and vapor deposition methods. 5) Production of NIR-OLED with low energy consumption also on flexible substrates. 6.Homogeneous luminous surfaces, lightweight and easy to integrate in the architectural and automotive sectors or in the aerospace, surveillance and defense sectors with paramount advantages over the classic commercial LED point emitters.
Italy