What They Say
The Elec has reported that Samsung Display has started the development of two emitter layer (tandem) OLEDs with a view to supplying them to Apple for iPad use in 2024. The material set is reported to have been labelled as the T (for Tandem) series. Commercial production might start by Q3 2023 and the initial customer is ‘likely’ to be Samsung Electronics, the blog said.
The Elec said that the challenge in a two-stack structure is to have the charge generation layer, or CGL, control the charge to flow in the same locations on the two emission layers, or else this will negatively affect the color purity and brightness of the red, green and blue pixels on the two layers.
Samsung Electronics is reported to be using a single stack architecture for its OLED-based devices to be launched this year, and with Samsung’s M12 material stack.
What We Think
Last year, Samsung and Apple were reported to have stopped a project to develop OLEDs for Apple’s IT products because Apple wanted tandem OLEDs (which are used, for example, by LG Display in automotive panels), but was not prepared to pay the price that Samsung wanted them to pay. On the other hand, Samsung wants to go ahead with a major expansion of its OLED manufacturing facilities and has a plan that it has not yet pulled the trigger on, to build a big G8 fab for OLEDs for IT. Without demand from a supplier of premium IT products like Apple, that decision was difficult. Apple, of course, knows that.
I have written over the years of meetings that I would have been fascinated to have been an observer of, for example between Sony and Samsung over S-LCD, between Sharp and Foxconn over SDP, etc. The Apple/Samsung meetings would be just as interesting, I suspect! (BR)
Schematic diagrams of a single OLED and a tandem OLED respectively Source:Researchgate
