“They have tried materials like OLED and QD-LED, but the photoresponsivity is not so good. For our perovskite LED, it’s good.”

interested in how to integrate the function of a touchscreen, or imaging – photo-sensitive pixels – can do far more than detect touch. They can image objects placed on a display, detect fingerprints, and even charge a device.

Perovskites are a class of materials that form a crystal structure like that of the eponymous perovskite—a calcium titanium oxide mineral discovered in the Ural Mountains of Russia in 1839

“If you want a material to have a good photo response, you need to generate electron carriers in these materials”

“In perovskite, this is easy.”

It’s the carrier transport layer that allows the movement of electrons, which in turn makes it possible to detect touch input. And because PeLEDs are photosensitive, they can both detect and image the objects that touch the display.

“It’s a fundamental concept that good solar cells should be good LEDs, people know this well,”



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