Science Daily August 23, 2021
Previous versions of light-emitting memories required the integration of two separate devices with differing materials, complicating fabrication. Using just one perovskite layer between contacts an international team of researchers (Taiwan, Japan) fabricated a device that works both as a RRAM and a light-emitting electrochemical cell. By taking advantage of the fast, electrically switchable ionic motion that enables this dual functionality in a single layer of perovskite they connected two devices together and developed an all-inorganic perovskite light-emitting memory. They used perovskite quantum dots of two different sizes for the two devices in the light-emitting memory to achieve different emission colors depending on whether the memory was being written or erased, providing a real-time indicator of the ones and zeros. Using perovskite consisting of cesium lead bromide (CsPbBr3), they demonstrated that data can be electrically written, erased, and read in one of the perovskite devices acting as an RRAM and optically transmitted whether data is being written or erased through light emission…read more. Open Access TECHNICAL ARTICLE
CsPbBr3 QD-based LEM device structure and QD properties. Credit: Nature Communications volume 12, Article number: 4460 (2021)Â