Cadmium-free QD LED beats 1000 hour milestone
The test has been conducted with red and green quantum dots encapsulated in resin and mounted over a blue emitting LED, similar to the type of LEDs used in standard LCD display back light units (BLU).
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 1000 hour mark with no measurable degradation of intensity, peak emission or FWHM, which is the measure for color purity. The QD-LED packaged units will continue to be under power and measurements of key performance criteria taken through and beyond the 3000 hour test protocol.
“Over the past six months we have made significant progress on our core mission of bringing to market a high performance, reasonably priced cadmium-free quantum dot film solution for large-form LCD display applications and we will report on this in the very near future. While we expect QD-infused film to be the preferred display solution for the next several years, the high heat durability and stability of our QD materials puts us in a strong position to enable the industry to make this transition to QD-LED on-chip solutions when that time comes”, said Quantum Materials’ President and CEO Stephen Squires in a company statement.
Quantum Materials Corp – www.QMCDOTS.com