Samsung Advanced Institute of Technology (SAIT), Samsung’s R&D hub, has secured industry-leading cadmium-free blue Quantum Dot light-emitting diodes’ (QLEDs) performance.
Since blue is known to be the most difficult colour to implement out of the three primary QLED colours (red, blue and green), this achievement – coming in the wake of Samsung’s development of red QLED technology last November – once again proves Samsung’s excellence in the quantum dot technology sphere.
Quantum dots (QDs) are semiconductor particles that measure a few nanometers in diameter (tens of thousands of times narrower than a single human hair). When illuminated, they re-emit light of a certain colour depending on their size.
The blue QD, which has the largest band gap among the three primary colours, rapidly oxidizes upon exposure to external light, resulting in a short lifespan and low luminous efficiency. For this reason, up to now, the industry had failed to develop even the technology required for blue quantum dot light-emitting diodes.
But now, SAIT has successfully developed blue QLED technology, achieving industry-leading results such as 20.2% improved luminous efficiency, 88,900 nits of maximum luminance and 16,000 hours of QLED lifetime (measured at half-brightness for 100-nit luminance).
“Samsung’s distinctive quantum dot technology has once again overcome the limitations of existing technology in the industry,” noted Eunjoo Jang, Samsung Fellow and corresponding author for the study. “I hope that this study goes on to help accelerate the commercialization of Quantum Dot light-emitting diodes (QLEDs).”
Taehyung Kim, Principal Researcher and the first author of the study, said, “This research is meaningful in that we have not only established Quantum Dot light-emitting diode performance but have also proven that the technology can deliver top-notch performance at the element level.”