Safer X-Rays and Unbreakable Smart Screens with Perovskites?
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1. What are Perovskites?
Perovskites are a family of crystals with a distinctive crystal structure of cuboid and diamond shapes. They are remarkably efficient at absorbing photons of light to be converted into an electric current. This family of materials show great promise for nanotechnology applications and there is widespread interest for their superconducting, electronic and ferroelectric properties.
2. Unbreakable Smart Screens
Researchers from the University of Queensland St. Lucia reported a new composite material, lead halide perovskite, with outstanding mechanical properties not shown in traditional glass made of inorganic materials. The new material does not crack under stress and has bright prospects of applications in smartphones, TVs, laptops, windshields, etc.
3. Perovskite Solar Cells - 25% Efficiency
Scientists at UNIST have achieved the world's highest power conversion efficiency record for a perovskite solar cell at 25.8%. It was found that an unencapsulated device maintained about 90% of their initial efficiency even after continuous light exposure for 500 hours.
4. Safer X-rays
Solid-state radiation detectors use crystalline semiconductors such as silicon or germanium, to directly convert X-ray photons onto electrical current. These devices are typically more sensitive than other detection technologies. Researchers have demonstrated that a thin film pervoskite-based X-ray detector is 100x more sensitive than a silicon-based device. This means lower radiation doses whilst boosting increased resolution for security scanners and medical X-rays.
3D-printed nanopixels can increase the resolution and emission brightness of display pixels depending on the height variation of the pixels. Scientists at Hong Kong University showed that the emission intensity increased with the height of 3D-printed nanopixels, and the team envision the technology to be used in encryption and security printing applications where information can be stored in accordance with the height of the pixels.