In a remarkable breakthrough poised to revolutionize display technologies, researchers have unveiled a new red organic light-emitting diode (OLED) exhibiting an unprecedented external quantum efficiency (EQE) of 25.6% at an extraordinarily high luminance of 10,000 cd m⁻². This advancement stems from the innovative incorporation of selenium atoms into a multiple resonance framework, a pioneering approach that promises significant leaps in both energy efficiency and brightness for next-generation display and lighting applications.
OLEDs have long been celebrated for their potential to deliver vivid colors, flexible form factors, and energy-efficient light emission. However, the challenge of boosting efficiency, especially at high brightness levels required for practical displays, has impeded widespread adoption and optimization. Traditional OLEDs often suffer from efficiency roll-off as luminance increases, curbing their performance in high-intensity environments. The study, published in the prestigious journal Light: Science & Applications, details how selenium embedding into a multiple resonance molecular framework fundamentally overcomes these limitations, delivering both efficiency and luminance benchmarks that have been elusive until now.
The researchers, led by the team of Pu, Cai, and Li, crafted a novel emitter molecule by strategically integrating selenium atoms into the molecular scaffold of multiple resonance (MR) compounds. Multiple resonance emitters are renowned for their narrow emission spectra and high color purity, but historically, their efficiencies at elevated brightness have been suboptimal. Selenium, a heavier chalcogen element, modulates the electronic structure of these molecules, enhancing spin-orbit coupling and facilitating more efficient radiative decay pathways. This results in a synergistic effect, dramatically increasing the number of photons emitted per electron injected.
One of the most striking aspects of this development is its ability to sustain high efficiency at luminance levels that simulate real-world device demands. Most high-efficiency organic emitters exhibit significant drops in quantum efficiency as luminance reaches the 1,000 cd m⁻² range due to triplet-triplet annihilation and other quenching phenomena. However, this red OLED demonstrated outstanding performance at 10,000 cd m⁻², a tenfold increase over common metrics, heralding its suitability for ultra-bright display panels and lighting fixtures without compromising energy consumption.
At the core of this technology lies the selenium-embedded multiple resonance frame, which delicately balances rigidity and electronic conjugation to restrict non-radiative decay routes. This molecular design leads to an ultranarrow emission bandwidth, resulting in extremely pure and saturated red hues. The consequent color fidelity is essential for high-definition displays where color gamut and accuracy directly affect visual quality. Furthermore, the emission wavelength remains stable under high current densities, ensuring consistent color output even during intensive usage.
The fabrication process described by the authors adheres to scalable solution and vacuum deposition techniques, making integration into existing OLED manufacturing pipelines feasible. The compatibility of the selenium-embedded emitters with conventional host materials and charge transport layers further simplifies their adoption. Beyond performance metrics, the device architecture was optimized to minimize charge imbalance and exciton quenching, reinforcing the robustness and longevity of the resulting OLEDs.
This advancement resonates profoundly with the ongoing pursuit to develop efficient, durable, and color-pure OLEDs tailored for high-performance applications including smartphones, augmented reality displays, and ultra-high-definition televisions. It also has implications for sustainable lighting solutions where efficiency at high luminance can translate into reduced power consumption and heat dissipation, thereby enhancing the operational life and environmental footprint of lighting devices.
From a materials science perspective, the successful embedding of selenium into the MR framework represents a novel vector to manipulate excited-state dynamics in organic molecules. Selenium’s role extends beyond a mere atomic substitution; it introduces new spin–orbit interactions enhancing reverse intersystem crossing (RISC), which is critical in thermally activated delayed fluorescence (TADF) mechanisms. By facilitating efficient harvesting of triplet excitons into singlet states, the device achieves higher internal quantum efficiencies than traditional fluorescent OLEDs.
The reported external quantum efficiency of 25.6% marks a significant milestone in the field of organic optoelectronics, especially given that it maintains this efficiency at operationally relevant brightness levels. Such a balance was previously achievable only in green or blue OLEDs, making this red-emitting device a worthy addition to the suite of high-performance OLED emitters. The researchers emphasize that their approach could be extended to other color regions by adjusting the chemical environment around selenium and other heavy atoms.
In terms of device stability, preliminary measurements suggest that selenium incorporation does not compromise the operational lifetime, which remains a critical consideration for commercial deployment. The enhanced photophysical properties imparted by the MR framework also mitigate degradation pathways often encountered in long-term device operation. Future work is expected to further optimize the molecular design and device encapsulation strategies to maximize both efficiency and lifespan.
The implications of this research stretch into the realm of full-color display fabrication where balanced efficiencies across red, green, and blue pixels are paramount. Achieving high EQE in red OLEDs at practical luminance levels has been a bottleneck in equalizing color performance, thus limiting the overall display efficiency and color balance. This breakthrough suggests the dawn of homogeneous high-efficiency pixel technologies, potentially transforming the OLED market landscape.
Beyond displays, the technology presents promising prospects for solid-state lighting, where highly efficient red emitters complement green and blue emitters to create tunable white light sources with excellent color rendering indices. The narrow emission spectra and high luminance also enable applications in specialized phototherapy and signaling technologies where spectral precision is crucial.
Moreover, the mechanism identified in this study can inspire further fundamental research in organic semiconductor physics, particularly concerning how heavy atom effects mediated by selenium modulate spin dynamics and emission processes. This could pave the way for a new generation of organic emitters tailored at the atomic level to achieve bespoke photophysical properties.
The research community anticipates that this selenium-embedded multiple resonance framework will usher in a transformative era for OLED technology, enabling devices that are brighter, more color-accurate, and energy-efficient. The confluence of materials innovation and device engineering showcased here exemplifies how interdisciplinary collaboration can solve entrenched challenges in optoelectronics.
As OLEDs continue to dominate the display market alongside emerging microLED and quantum dot technologies, advances like this position organic emitters as indispensable components thanks to their unique advantages of flexibility, tunability, and cost-effectiveness. The new red OLED described by Pu and colleagues not only elevates performance benchmarks but also expands the scientific understanding of organochalcogen chemistry in optoelectronic applications.
In conclusion, the discovery and demonstration of this high-efficiency, high-brightness red OLED employing selenium embedding within a multiple resonance framework represent a landmark achievement. It challenges long-standing performance trade-offs in organic emitters and sets a new standard for what can be achieved in the pursuit of vibrant, sustainable, and efficient display and lighting technologies. The industry and academic fields alike will be watching closely as this technology matures and enters commercial realms in the near future.
Subject of Research:
Red organic light-emitting diodes (OLEDs) with enhanced efficiency and luminance through selenium-embedded multiple resonance molecular frameworks.
Article Title:
Red OLED with efficiency of 25.6% at 10,000 cd m⁻² based on selenium embedding multiple resonance framework.
Article References:
Pu, Y., Cai, X., Li, C. et al. Red OLED with efficiency of 25.6% at 10,000 cd m⁻² based on selenium embedding multiple resonance framework. Light Sci Appl 15, 191 (2026). https://doi.org/10.1038/s41377-026-02220-w
Image Credits:
AI Generated
DOI:
08 April 2026
