The Signal
Study Reports 14,400-Hour Green Quantum-Dot-Electrolyte LED
A study in Nature Communications reports a green quantum-dot-electrolyte LED with a T95 lifetime of 14,400 hours at 1,000 cd/m². The researchers also report red and blue devices and demonstrate active-matrix displays using all three colors.
Quantum.world Team · Written with AI · fact-checked ·
A green quantum-dot-electrolyte LED reaches a reported T95 lifetime of 14,400 hours at a luminance of 1,000 cd/m², the headline result in a study published November 2, 2026, in Nature Communications. The researchers also report red and blue devices, extending this class of light-emitting diode to all three primary display colors. The blue device has a reported T95 lifetime of 244.5 hours at the same luminance, which the authors describe as record stability for solution-processed blue LEDs without light-outcoupling technologies.
One architecture for red, green and blue
The study addresses a gap in quantum-dot-electrolyte LEDs, or QE-LEDs: the authors say red-device performance had been limited, while green and blue versions had not been reported. Their inverted architecture supports red, green and blue emission and is designed to eliminate solvent-compatibility issues between device layers. The researchers also demonstrate RGB active-matrix displays, reporting stability and uniformity in those displays.
“Here, we report an inverted architecture that eliminates solvent compatibility issues, enabling efficient and stable red/green/blue (RGB) QE-LEDs.”
Yunfei Ren, Baiquan Liu, Zhexi Chen and co-authors, the study’s authors
How the electrolyte layer changes charge flow
The device puts an ionic liquid into the quantum dots, forming an electrolyte emitting layer. According to the study, this layer enhances charge injection and transport. The design also places an insulating layer between the emitting layer and the electron-transport layer. The authors report that this insulating layer suppresses excessive electron leakage, another part of the architecture intended to improve device operation.
External quantum efficiency, or EQE, measures the share of injected electrical charge that produces light leaving the device. The reported peak EQEs are 24.2% for red, 20.3% for green and 13.5% for blue. These efficiency figures describe peak performance; the lifetime figures are reported separately at a luminance of 1,000 cd/m².
The blue device still trails its red and green siblings
The red device combines a peak EQE of 24.2% with a reported T95 lifetime of 13,100 hours at 1,000 cd/m². The green device posts a 20.3% EQE and a 14,400-hour T95 lifetime at the same stated luminance. Blue is less efficient and has a much shorter reported lifetime: 13.5% EQE and 244.5 hours. The authors’ blue-device comparison is limited to solution-processed blue LEDs without light-outcoupling technologies; they do not claim a record across every blue LED design.
A display demonstration, with a patent filed
The active-matrix demonstration takes the result beyond individual emitting devices: the researchers report displays incorporating red, green and blue QE-LEDs, with stability and uniformity described as excellent. The devices and displays rely on the same inverted architecture and electrolyte emitting layer described in the study, linking the color-specific device results to the full-color demonstration.
The paper lists a 2026 patent application concerning the QE-LEDs, naming Baiquan Liu, Yunfei Ren and Chuan Liu as the patent authors. The reported device lifetimes, the RGB display demonstration and the patent application are among the study’s reported results.