Sustainable and Tunable Synaptic Electrolyte-Gated Organic Field-Effect Transistors (EGOFETs) for Light Adaptive Visual Perceptive Systems

Author(s)

Serghiou, Theodoros ; Fernandes, Jose Diego ; Karthikeyan, Vaithinathan ; Assi, Dani S. ; Vieira, Douglas Henrique ; Alves, Neri ; Kettle, Jeff

• Document type: Journal article
• Source: ADVANCED FUNCTIONAL MATERIALS; v. N/A, p. 12-pg., 2025-01-08.

Abstract

The recent advances in optic neuromorphic devices have led to a subsequent rise in the development of energy-efficient artificial-vision systems. While the energy consumption of such devices is known to be much lower than conventional vision systems, it is known that manufacturing accounts for the largest share of the climate impact in microelectronics, dominating over the product use phase. Thus, there is a need to develop sustainable manufacturing processes and to adopt low-impact materials for hardware solutions of the future. In this study, an Electrolyte-Gated Organic Field-effect Transistor (EGOFET) is experimentally demonstrated for the implementation of a high-performing synaptic optical sensor using sustainable materials that degrade to benign products at the End of Life (EoL). The device shows remarkable light response with maximum Paired-Pulse Facilitation (PPF) Index of up to 151% at a light power density of 38 mu W cm-2, which enables artificial synaptic applications with an average power consumption as low as 2.4 pJ for each training process, representing one of the best among the reported results. To demonstrate the tunability of the vision system, an ensemble decision tree is used to enable the EGOFET to distinguish and remember different primary colors at different power densities with 95.6% accuracy. (AU)

• FAPESP's process: 20/12282-4 - Development of vertical electrolyte-gated field effect transistors for UV photodetectors
• Grantee: Douglas Henrique Vieira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 22/14423-0 - Manufacture and optimization of biodegradable electronic devices
• Grantee: José Diego Fernandes Dias
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 20/12060-1 - EGOFETs and Schottky diode: influence of the supramolecular arrangement on electrical properties
• Grantee: José Diego Fernandes Dias
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/02604-4 - Study of printed supercapacitors integrating electrolyte-gated transistors
• Grantee: Maykel dos Santos Klem
• Support Opportunities: Scholarships in Brazil - Doctorate