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Fabrication of ReRAM memory devices based on CuxS and COS thin films

Grant number: 16/17302-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2017
Effective date (End): February 28, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Carlos Frederico de Oliveira Graeff
Grantee:Mirko Congiu
Home Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID


This postdoc project consists on the study and application of thin films of copper and cobalt sulphide (CoS, Cu2-xS and CuS) as active layers of memristors. The study will be focused on the manufacture of multi-layer devices, whose function is to store information over time. The candidate will apply the deposition techniques, developed during his PhD (processo FAPESP 2013/07396-7), for the fabrication of novel devices based on cheap and abundant materials. In order to investigate and optimize methods for large-scale fabrication, printing processes will be focused in this study. The proposed devices are based on a two-terminal structure: a sandwich of two different semiconductors. One of the first objective of this project is to study the interfaces between CuS and its non-stoichiometric phase Cu2-xS. These materials can be printed directly on the substrate sequentially. Also the junctions between CoS and CuS or Cu2-xS will be considered. All devices will be characterized using the most modern techniques such as electrochemical impedance spectroscopy and cyclic voltammetry. The devices will be also implemented in an experimental electronic system based on a microcontroller. The real application in electronic circuits could be a valid diagnostic instrument to show the real performance of the considered materials. This project benefits from the scientific collaboration with the Italian institution Consiglio Nazionale delle Ricerche (CNR-ISM, Montelibretti, Roma, Italy). (AU)

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CONGIU, MIRKO; BORATTO, MIGUEL H.; GRAEFF, CARLOS F. O. A Synaptic Electrochemical Memristor Based on the Cu2+/Zn2+ Cation Exchange in Zn:CdS Thin Films. CHEMISTRYSELECT, v. 3, n. 34, p. 9794-9802, SEP 14 2018. Web of Science Citations: 2.
BORATTO, MIGUEL H.; CONGIU, MIRKO; DOS SANTOS, STEVAN B. O.; SCALVI, LUIS V. A. Annealing temperature influence on sol-gel processed zirconium oxide thin films for electronic applications. CERAMICS INTERNATIONAL, v. 44, n. 9, p. 10790-10796, JUN 15 2018. Web of Science Citations: 2.
BORATTO, MIGUEL H.; RAMOS, JR., ROBERTO A.; CONGIU, MIRKO; GRAEFF, CARLOS F. O.; SCALVI, LUIS V. A. Memristive behavior of the SnO2/TiO2 interface deposited by sol-gel. Applied Surface Science, v. 410, p. 278-281, JUL 15 2017. Web of Science Citations: 8.
BONOMO, MATTEO; CONGIU, MIRKO; DE MARCO, MARIA LETIZIA; DOWLING, DENIS P.; DI CARLO, ALDO; GRAEFF, CARLOS F. O.; DINI, DANILO. Limits on the use of cobalt sulfide as anode of p-type dye-sensitized solar cells. JOURNAL OF PHYSICS D-APPLIED PHYSICS, v. 50, n. 21 JUN 1 2017. Web of Science Citations: 4.

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