unable Charge-Density PEDOT:PSS for Application in Post-Synaptic Organic Neuromorphic Electrode

Autor(es)

Barbosa, Henrique F. P. ^{[1, 2]} ; Higuita, German D. Gomez ^{[1, 2]} ; Gunther, Florian ^[1] ; Faria, Gregorio C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, Av Trab Sao Carlense, 400 Parque Arnold Schimi, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Escola Engenharia Sao Carlos, Dept Engn Mat, Av Joao Dagnone, 1100, Jd Sta Angelina, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED ELECTRONIC MATERIALS; v. 8, n. 2 DEC 2021.
• Citações Web of Science: 0

Resumo

Since the discovery of neuromorphic computing, the search for the ideal hardware technology has been the main focus of technological research and development in the area. Among the candidates, the electrochemical neuromorphic organic device (ENODe) shows promising properties such as low energy consumption, high computing efficiency, and relatively inexpensive units. However, ENODes suffer from long term instability, especially due to electrode degradation. Here, the use of a modified poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) synthesis is proposed to obtain intrinsically low-charge density PEDOT:PSS inks for application as post-synaptic electrodes in ENODes. The charge density of the synthesized inks is evaluated by optical spectroscopy, revealing that the amount of oxidizing agent in the synthesis route is directly correlated with the PEDOT:PSS charge density. ENODes fabricated with the synthesized low-charge density PEDOT:PSS operate in the low-voltage regime, with good stability and present non-volatile memory levels. The easy-to-implement synthetic approach unlocks new strategies for producing stable and tunable charge-density materials for constructing the next-generation of organic neuromorphic devices. (AU)

• Processo FAPESP: 08/57706-4 - Instituto Nacional de Eletrônica Orgânica (INEO)
• Beneficiário: Roberto Mendonça Faria
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/15670-5 - Novos materiais semicondutores baseadas em PDMS e DPP para Eletrônicas Flexíveis e Esticáveis: Fabricação, Análise e Aplicações em Dispositivos Orgânicos
• Beneficiário: Florian Steffen Günther
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado