Organic light emitting diodes (OLEDs) have developed rapidly over the last few decades, from fluorescent emitters that relied on organic dyes, to modern devices based on thermally activated delayed fluorescence, and beyond. Driven by improved understanding of the fundamental mechanisms at play in OLEDs, and materials and device architecture developments, their applications include high-performance displays and lighting, and in biomedical fields. Achieving their full potential will rely on overcoming challenges that include OLED efficiency roll-off, lifetime and light output, and large-scale device synthesis.

This Collection brings together the latest developments in OLEDs. Topics of interest include, but are not limited to, the following:

• Fundamental understanding of OLEDs, including their physics and chemistry
• Developments in materials that improve OLED performance, such as TADF, multi-resonance TADF, metal–metal-to-ligand charge-transfer (MMLCT) complex
• Near Infrared OLEDs
• New device architectures
• OLED fabrication for commercialization, such as scaling-up, low cost-synthesis or environmentally friendly materials and ink-jet printed OLEDs.
• Applications demonstrations

We welcome the submission of any paper related to OLEDs. All submissions will be subject to the same review process and editorial standards as regular Communications Materials Articles.