Pseudohalide-Induced 2D (CH3NH3)2PbI2(SCN)2 Perovskite for Ternary Resistive Memory with High Performance

被引：105

作者：

Cheng, Xue-Feng ^{[1
]}

Hou, Xiang ^{[1
]}

Zhou, Jin ^{[1
]}

Gao, Bi-Jun ^{[1
]}

He, Jing-Hui ^{[1
]}

Li, Hua ^{[1
]}

Xu, Qing-Feng ^{[1
]}

Li, Na-Jun ^{[1
]}

Chen, Dong-Yun ^{[1
]}

Lu, Jian-Mei ^{[1
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Collaborat Innovat Ctr Suzhou Nanosci & Technol, Natl United Engn Lab Functionalized Environm Adso, Suzhou 215123, Peoples R China

来源：

SMALL | 2018年 / 14卷 / 12期

关键词：

2D; perovskite; pseudohalide; RRAM; ternary memory; SINGLE-ATOM SUBSTITUTION; CHARGE-LIMITED CURRENTS; NONVOLATILE MEMORY; ORGANIC SEMICONDUCTORS; DATA-STORAGE; SOLAR-CELLS; HALIDE PEROVSKITES; DEVICE; LEAD; BEHAVIOR;

D O I：

10.1002/smll.201703667

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Recently, organic-inorganic hybrid perovskites (OIHP) are studied in memory devices, but ternary resistive memory with three states based on OIHP is not achieved yet. In this work, ternary resistive memory based on hybrid perovskite is achieved with a high device yield (75%), much higher than most organic ternary resistive memories. The pseudohalide-induced 2D (CH3NH3)(2)PbI2(SCN)(2) perovskite thin film is prepared by using a one-step solution method and fabricated into Al/perovskite film/indium-tin oxide (glass substrate as well as flexible polyethylene terephthalate substrate) random resistive access memory (RRAM) devices. The three states have a conductivity ratio of 1:10(3):10(7), long retention over 10 000 s, and good endurance properties. The electrode area variation, impedance test, and current-voltage plotting show that the two resistance switches are attributable to the charge trap filling due to the effect of unscreened defect in 2D nanosheets and the formation of conductive filaments, respectively. This work paves way for stable perovskite multilevel RRAMs in ambient atmosphere.

引用

页数：8

共 87 条

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