24.04.2024 • Newslighting

A new approach to design efficient light-emitting materials

Researchers found a way to develop bright, efficient and color­ful OLEDs.

Researchers at the Organic Semi­conductor Centre in the School of Physics and Astronomy, and the School of Chemistry at the University of St Andrews have developed a new approach to designing efficient light-emitting materials. Light-emitting materials are used in organic light-emitting diodes (OLEDs) that are now found in the majority of mobile phone displays and smart­watches, and some tele­visions and automotive lighting.

New approach will help OLED researchers develop materials that maintain high...
New approach will help OLED researchers develop materials that maintain high efficiency at high brightness. (Source: I. Samuel)

The latest generation of emitter materials under development produce OLEDs that have high efficiency at low brightness, but suffer reduced effi­ciency as the brightness is increased to the levels required for lighting and outdoor applications. This problem is known as “efficiency roll-off”. Now, the researchers have identified the combination of features of materials required to overcome this problem. Guidelines developed by the team of researchers, led by Ifor Samuel and Eli Zysman-Colman, will help OLED researchers develop materials that maintain high effi­ciency at high bright­ness, enabling the latest materials to be used for appli­cations in displays, lighting and medicine.

Commenting on the research, Zysman-Colman explained that the findings “provide clearer insight into the link between the properties of the emitter material and the per­formance of the OLED.” Ifor Samuel said, “Our new approach to this problem will help to develop bright, efficient and color­ful OLEDs that use less power.” (Source: U. St Andrews)

Reference: S. Diesing et al.: A figure of merit for efficiency roll-off in TADF-based organic LEDs, Nature 627, 747 (2024); DOI: 10.1038/s41586-024-07149-x

Link: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, UK

Digital Events

Digital Event Calendar 2025
live or on demand

Digital Event Calendar 2025

By participating in our free digital events, you can stay up to date in your field of expertise.

SPS Atlanta

A New Era of Smart Manufacturing Begins

A New Era of Smart Manufacturing Begins

The inaugural SPS – Smart Production Solutions Atlanta starts soon, marking a significant milestone in the evolution of the SPS brand

most read

Photo
10.06.2025 • NewsMachine Vision

The winners of the inspect award 2025

This time, with two additional categories, “SMEs” and “Artificial Intelligence,” the selection was even larger than usual. But now they have been chosen: the machine vision products of the year 2025.