Samsung Display is already working to improve the QD-OLED technology. The news, reported by the Korean newspaper The Elec, was Kwon Jang-hyuk, a professor at Kyung Hee University. During a presentation held in the frame of the SID 2022 Review Symposium, Professor Kwon illustrated the innovations on which the research and development activities of the Korean giant are focusing.
The aspect in which we want to intervene is the blue organic emitters, the elements placed at the base of the QD-OLEDs as they act both as a direct source for blue light and as a trigger for color conversion by the red and green Quantum Dots ( here we explain in detail how QD-OLEDs work and the differences with other OLEDs).
QD-OLED TVs currently use organic blue fluorescent emitters arranged on a triple layer. This structure is necessary since the fluorescent materials are much less efficient than the phosphorescent ones which on other types of OLED screens are used for green and red. The luminous efficiency in the passage of light inside the panels is only 25% for the blue fluorescent emitters, against 100% for the phosphorescent organic components, which also guarantee a longer duration over time.
For this reason, Samsung Display is working to replace fluorescent materials with phosphorescent ones. The higher efficiency would allow decreasing the number of substrates containing the blue emitters: Kwon argues that it should go from three to only one. This modification would simplify the production of the panels by reducing their cost and would obviously also have positive repercussions on overall efficiency.
The research has been underway some time ago (we are talking about over a year) and is aimed at obtaining visible results within the year. It is therefore likely that, in case there are positive developments, these may already arrive with the next generations of QD-OLED panels for TVs and monitors.