Samsung working to improve the efficiency of QD-OLEDs and reduce costs

Samsung Display is already working to improve the QD-OLED technology. To give the news, reported by the Korean newspaper The Elecwas Kwon Jang-hyuk, 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 on which we want to intervene are the organic blue emittersthe elements placed at the base of the QD-OLEDs as they act both as a direct source for the blue light and as a trigger for the color conversion by the red and green Quantum Dots (here we explain in detail how the 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 because 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 for replace fluorescent materials with phosphorescent ones. The greater efficiency would allow to decrease the number of substrates containing blue emitters: Kwon says you should go from three to just one. This modification would simplify the production of the panels reducing the cost and it 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 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.


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