Efficiency Beyond the Roll-off: Unveiling a Novel Approach to Improving Light-emitting Materials for Displays, Lighting, and Medical Applications

Advancement in OLED Technology Set to Transform Technology Displays

Researchers at the University of St. Andrews have unveiled a new multidisciplinary project aimed at improving the efficiency of televisions, computer screens, and lighting systems. Led by professors Ifor Samuel and Eli Zysman-Colman from the Organic Semiconductor Centre in the School of Physics and Astronomy and the School of Chemistry, the research team has introduced a novel approach to designing efficient light-emitting materials.

The latest generation of emitter materials being developed aim to improve organic light-emitting diodes (OLEDs) efficiency at low brightness levels but face challenges as efficiency decreases at higher brightness levels required for lighting and outdoor applications, known as ‘efficiency roll-off.’ By identifying specific material features to address efficiency roll-off, the researchers have developed guidelines to help OLED researchers create materials that maintain high efficiency at high brightness.

This advancement opens up opportunities for the latest materials to be used in displays, lighting, and medical applications. Professor Zysman-Colman highlighted that the research findings provide a clearer understanding of the connection between emitter material properties and OLED performance. Professor Samuel added that their new approach will contribute to the development of bright, efficient, and colorful OLEDs that consume less power. With their work recognized by Nature, there is optimism for industrial interest in implementing these advancements to achieve more efficient and cost-effective LEDs in various applications.

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