Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session X01: The Organic Electrochemical TransistorInvited Live
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Sponsoring Units: DPOLY Chair: Dean DeLongchamp, National Institute of Standards and Technology |
Friday, March 19, 2021 8:00AM - 8:36AM Live |
X01.00001: Designing polymeric mixed ionic/electronic conductors for organic electrochemical transistors Invited Speaker: Jonathan Rivnay Organic electrochemical transistors (OECTs) have gained considerable interest for applications in bioelectronics, power electronics, circuits and neuromorphic computing. Their defining characteristic is the bulk-modulation of channel conductance owing to the facile penetration of ions into the (semi)conducting polymeric channel. For this reason, their device scaling relies on film thickness, and often relaxes the stringent demands of clean and controlled interfaces required in traditional FETs. Despite recent progress and a rapidly expanding library of new materials, the understanding of stability and transport/coupling of ionic and electronic carriers remain largely unexplored. We highlight recent synthetic and processing approaches used to tailor device properties and stability, as well as new device concepts enabled by such advances. Our understanding of critical processes in electrochemical devices further requires us to study these materials in device-relevant conditions, considering the effects of ions and solvent on microstructure and transport. To this end, we report on recent efforts using operando scattering and spectroscopy to build a more device-relevant picture of structure-transport relations. |
Friday, March 19, 2021 8:36AM - 9:12AM Live |
X01.00002: Electrolyte-Gated Transistors for Fundamental Physics and for Applications Invited Speaker: C. Daniel Frisbie Electrolyte-gated transistors (EGTs) constitute a general class of devices in which an electrolyte is employed as the gate insulator; the very large capacitance of the electrolyte results in low voltage operation, high gate-induced carrier densities, and consequently high transconductance. These devices are divided into two broad categories, either the electric double layer transistor (EDLT) or the electrochemical transistor (ECT), depending on the mechanism of operation. This talk will begin with a general description of EGTs using a solid state electrolyte or ion gel, including typical fabrication methods, principles of operation (i.e., electrochemical vs double-layer charging), and quasi-static and dynamic performance. Applications of EGTs in printed electronics and biosensing will be briefly described, and then the discussion will move to use of EGTs to explore transport physics in novel materials at high carrier density. Specific examples include double layer gating of organic semiconductor single crystals such as rubrene and C60, and 2D materials, such as tellurene. In the case of tellurene, we are able to access the insulator-to-metal transition. |
Friday, March 19, 2021 9:12AM - 9:48AM Live |
X01.00003: Adapting organic electronics to biology (and not vice versa!) Invited Speaker: Róisín M Owens In vitro models of biological systems are essential for our understanding of biological systems. In many cases |
Friday, March 19, 2021 9:48AM - 10:24AM Live |
X01.00004: Monitoring plant physiology with organic electrochemical transistors Invited Speaker: Eleni Stavrinidou Plants are the basis of food, providers of oxygens and regulators of the ecosystem. Plants |
Friday, March 19, 2021 10:24AM - 11:00AM Live |
X01.00005: Organic Electrochemical Transistors as Wearable, Human-Biochemistry Monitoring Technologies Invited Speaker: Erin Ratcliff Sweat is a biomarker-rich biofluid, where biomarkers that can inform about performance, health, disease state, nutrition and environmental impacts. The possibility of continuous, non-invasive collection makes sweat an attractive source to monitor and heal but also could facilitate diagnostics and performance augmentation. This talk will focus on device physics, interface characterizations, and viability of organic electrochemical transistors for wearable sweat sensors. Experimental results on devices will be complemented with benchtop laboratory chemistries and virtual sweat sensor simulations. |
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