Nonvolatile Cu∕CuTCNQ∕Al memory prepared by current controlled oxidation of a Cu anode in LiTCNQ saturated acetonitrile

Abstract

In this letter we propose a preparation method of the metal organic charge transfer complex Cu-tetracyanoquinodimethane ͑CuTCNQ͒ for use in nonvolatile organic memories. The method, consisting in current controlled oxidation of a Cu electrode in LiTCNQ saturated acetonitrile, is attractive because CuTCNQ growth is limited strictly to anodically polarized Cu metal, and because of material and solvent compatibilities with the requirements of the complementary metal-oxide-semiconductor ͑CMOS͒ copper back end-of-line process. Crossbar memories of this CuTCNQ exhibit superior performance compared to corresponding devices prepared by the standard method, which we attribute to a higher compactness of the CuTCNQ layer.

Fabrication and characterization of size-controlled CuTCNQ charge-transfer complex nanocrystals

“…Several fabrication methods for CuTCNQ micro/nanocrystals (MC/NCs) have been presented such as vapor deposition [25][26][27], spontaneous electrolysis in organic solvents [16][17][18][19], and chemical [34] and electrochemical [31][32][33] reduction methods. In the case of spontaneous electrolysis as well as chemical and/or electrochemical reduction techniques, nanoscale crystal size control is difficult although control of shape is possible.…”

Overview of emerging semiconductor non-volatile memories

“…The origin of resistive switch was explained that Cu in a CuTCNQ film is reduced by current from electrodes making Cu conductive filaments in a film [90]. The I-V characteristics resemble to those of oxide ReRAMs operate in bipolar mode.…”

“…The I-V characteristics resemble to those of oxide ReRAMs operate in bipolar mode. In [90], I-V hysteresis appears at the voltage as large as 3 V.…”

Systematic study on electrochemical properties of a series of TCNQ lanthanide complexes

“…In particular, the electrical, optical and switching properties of CuTCNQ and AgTCNQ have been widely studied [19][20][21][22][23][24][25]. In contrast to CuTCNQ and AgTCNQ, only recently the related binary M[TCNQ] 2 -based materials (M = Mn, Fe, Co and Ni) have generated a great deal of interest.…”