Electronics are getting smaller than ever. Researchers at ETH Zurich have created the tiniest organic LEDs (OLEDs) ever—up to 100 times smaller than a human cell. This tech could lead to super-dense displays for virtual and augmented reality devices.
The new OLEDs are just 100 nanometers wide. They are 50 times smaller than today’s best pixels and can show images with a density of 50,000 pixels per inch. In a cool demo, the researchers made the ETH Zurich logo using 2,800 of these tiny pixels, creating an image only 20 micrometers big.
This breakthrough came from new ceramic masks made of silicon nitride. These masks help deposit organic material very precisely. They work well with the lithographic techniques used in chip production, opening doors for industrial use.
Since the OLEDs are smaller than the light they emit, they can be used in ‘phase array’ systems. This means they can create directed light beams, holographic displays, and high-performance photonic networks. Researchers believe this tech could change how we design tiny screens in the future.
