All-inorganic perovskite quantum dot light-emitting memories
Journal
Nature Communications
Journal Volume
12
Journal Issue
1
Date Issued
2021
Author(s)
Abstract
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. © 2021, The Author(s).
Other Subjects
indium tin oxide; perovskite; poly(methyl methacrylate); quantum dot; electrochemical method; inorganic compound; light intensity; perovskite; quantum mechanics; Article; electric conductivity; electrochemical analysis; electrochemistry; internet of things; light emitting memory
Type
journal article