The successful implementation of quantum dots with LEDs has been slow to progress primarily due to the challenge of achieving the requisite reliability and durability to survive the heat generation inside the LED package without suffering thermal quenching and rapid performance deterioration.
The QD-LEDs were under continuous power at 2.5 volts DC at 70mA and were measured initially, incrementally and at the 7000 hour mark with no measurable degradation of intensity, peak emission or FWHM, which is the measure for color purity.
“Passing the one year (7000 hour) mark for continuous on time is a major achievement in proving our quantum dots and our encapsulation technologies can enable QD-LEDs and the wide range of potential QD-LED applications,” said Stephen Squires, Quantum Materials president and CEO. “Through this development effort, we have also made significant discoveries that have improved performance of our electroluminescent quantum dot materials, paving the way for next generation display and lighting applications. Our team continues to demonstrate the extraordinary accelerated discovery that can be accomplished using our patented continuous flow process.”
Semiconductor quantum dots have attracted attention for their unique characteristics for solid state lighting and displays. The pure and tunable spectra of QDs make it possible to simultaneously achieve excellent color rendering properties and high luminous efficiency when combining colloidal QDs with light emitting diodes (LEDs) or micro LEDs.