Three-dimensional perovskite nanowire array-based ultrafast resistive RAM with ultralong data retention

Yuting Zhang, Swapnadeep Poddar, He Huang, Leilei Gu, Qianpeng Zhang, Yu Zhou, Shuai Yan, Sifan Zhang, Zhitang Song, Baoling Huang, Guozhen Shen, Zhiyong Fan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Resistive random access memories (Re-RAMs) have transpired as a foremost candidate among emerging nonvolatile memory technologies with a potential to bridge the gap between the traditional volatile and fast dynamic RAMs and the nonvolatile and slow FLASH memories. Here, we report electrochemical metallization (ECM) Re-RAMs based on high-density three-dimensional halide perovskite nanowires (NWs) array as the switching layer clubbed between silver and aluminum contacts. NW Re-RAMs made of three types of methyl ammonium lead halide perovskites (MAPbX3; X = Cl, Br, I) have been explored. A trade-off between device switching speed and retention time was intriguingly found. Ultrafast switching speed (200 ps) for monocrystalline MAPbI3 and ~7 × 109 s ultralong extrapolated retention time for polycrystalline MAPbCl3 NW devices were obtained. Further, first-principles calculation revealed that Ag diffusion energy barrier increases when lattice size shrinks from MAPbI3 to MAPbCl3, culminating in the trade-off between the device switching speed and retention time.

Original languageEnglish
Article numbereabg3788
JournalScience advances
Volume7
Issue number36
DOIs
Publication statusPublished - Sept 2021
Externally publishedYes

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