One material with two functions could lead to faster memory

https://www.kyushu-u.ac.jp/en/researches/view/216

"Using perovskite consisting of cesium lead bromide (CsPbBr3)... data can be electrically written, erased, and read in one of the perovskite devices acting as an RRAM. Simultaneously, the second perovskite device can optically transmit whether data is being written or erased through light emission by working as a light-emitting electrochemical cell with a high transmission speed."

Related: Shedding light on unique conduction mechanisms in a new type of perovskite oxide
https://phys.org/news/2023-11-unique-mechanisms-perovskite-oxide.html