Last month Samsung Display announced that it has designed a new OLED stack (its M11 stack) that is 16% more efficient compared to its currently OLED stack. The first phone to adopt the new OLED materials will be the Galaxy S21 Ultra.
Anandtech posted an interesting and what seems to be comprehensive review of the Galaxy S21 Ultra display, comparing it to Samsung's previous generation panels. As you can see in the chart above, the results show that the new OLED stack is actually 26% to 31% more efficient when showing a full white screen. The brighter the display, the more efficient the new stack is compared to SDC's previous M10 OLED stack.
SDC did not reveal much about the new materials beyond saying that the new architecture "speeds up electron flows in the display’s organic layers".
