

Creating nano-PeLEDs, however, was no simple task. Perovskite materials are notoriously fragile and susceptible to damage during conventional photolithographic processes used to pattern LED displays. To overcome this, the research team developed a novel fabrication method involving lithographically patterned windows in an insulating layer. This technique protects the delicate perovskite material while preserving high image quality.
They’re creating a whole display panel, not individual components.
Well, kind of. Its main use is to customize existing stuff, like printing pictures on a phone case, custom key caps, and such. I don’t know what the ink is made of - I’m guessing a UV curable binder and pigments? Or liquid gold, judging from the price…