All-inorganic perovskite quantum dot light-emitting memories

Researchers use perovskite to develop a memory device readable through both electrical and optical methods.



“Field-induced ionic motions in all-inorganic CsPbBr3 perovskite quantum dots (QDs) strongly dictate not only their electro-optical characteristics but also the ultimate optoelectronic device performance. Here, we show that the functionality of a single Ag/CsPbBr3/ITO device can be actively switched on a sub-millisecond scale from a resistive random-access memory (RRAM) to a light-emitting electrochemical cell (LEC), or vice versa, by simply modulating its bias polarity. We then realize for the first time a fast, all-perovskite light-emitting memory (LEM) operating at 5 kHz by pairing such two identical devices in series, in which one functions as an RRAM to electrically read the encoded data while the other simultaneously as an LEC for a parallel, non-contact optical reading. We further show that the digital status of the LEM can be perceived in real time from its emission color. Our work opens up a completely new horizon for more advanced all-inorganic perovskite optoelectronic technologies.”

Find the open access technical paper link here.

Yen, MC., Lee, CJ., Liu, KH. et al. All-inorganic perovskite quantum dot light-emitting memories. Nat Commun 12, 4460 (2021). https://doi.org/10.1038/s41467-021-24762-w. Published 7/2021.

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