Search

Your search keyword '"Engquist, Isak"' showing total 2 results
Start Over Author "Engquist, Isak" Topic organic electrochemical transistors Publication Year Range Last 3 years Language english
2 results on '"Engquist, Isak"'

1. High-Gain Logic Inverters based on Multiple Screen-Printed Organic Electrochemical Transistors

Author

Zabihipour, Marzieh, Tu, Deyu, Forchheimer, Robert, Strandberg, Jan, Berggren, Magnus, Engquist, Isak, and Andersson Ersman, Peter

Subjects
Other Electrical Engineering, Electronic Engineering, Information Engineering, novel inverter designs, organic electrochemical transistors, PEDOT, PSS, printed organic electronics, tunable voltage gain, Mechanics of Materials, Hardware_INTEGRATEDCIRCUITS, General Materials Science, Hardware_PERFORMANCEANDRELIABILITY, Annan elektroteknik och elektronik, Industrial and Manufacturing Engineering
Abstract

Organic electronic circuits based on organic electrochemical transistors (OECTs) are attracting great attention due to their printability, flexibility, and low voltage operation. Inverters are the building blocks of digital logic circuits (e.g., NAND gates) and analog circuits (e.g., amplifiers). However, utilizing OECTs in electronic logic circuits is challenging due to the resulting low voltage gain and low output voltage levels. Hence, inverters capable of operating at relatively low supply voltages, yet offering high voltage gain and larger output voltage windows than the respective input voltage window are desired. Herein, inverters realized from poly(3,4-ethylenedioxythiophene):polystyrene sulfonate-based OECTs are designed and explored, resulting in logic inverters exhibiting high voltage gains, enlarged output voltage windows, and tunable switching points. The inverter designs are based on multiple screen-printed OECTs and a resistor ladder, where one OECT is the driving transistor while one or two additional OECTs are used as variable resistors in the resistor ladder. The inverters performances are investigated in terms of voltage gain, output voltage levels, and switching point. Inverters, operating at +/-2.5 V supply voltage and an input voltage window of 1 V, that can achieve an output voltage window with similar to 110% increment and a voltage gain up to 42 are demonstrated. Funding Agencies|Swedish foundation for Strategic Research (Silicon-Organic Hybrid Autarkic Systems)Swedish Foundation for Strategic Research [SE13-0045]; Knut and Alice Wallenberg Foundation (Wallenberg Wood Science Center); European UnionEuropean Commission [825339, 964677]; onnesjo Foundation

Published
2022

2. Designing Inverters Based on Screen Printed Organic Electrochemical Transistors Targeting Low‐Voltage and High‐Frequency Operation.

Author

Zabihipour, Marzieh, Tu, Deyu, Strandberg, Jan, Berggren, Magnus, Engquist, Isak, and Andersson Ersman, Peter

Subjects
SCREEN process printing, ELECTRONIC circuits, TRAFFIC safety, INTERNET of things, TRANSISTORS, POWER electronics, ORGANIC electronics, ORGANIC field-effect transistors
Abstract

Low‐voltage operating organic electronic circuits with long‐term stability characteristics are receiving increasing attention because of the growing demands for power efficient electronics in Internet of Things applications. To realize such circuits, inverters, the fundamental constituents of many circuits, with stable transfer characteristics should be designed to provide low‐power consumption. Here, a rational inverter design, based on fully screen printed p‐type organic electrochemical transistors with a channel size of 150 × 80 µm2, is explored for driving conditions with input voltage levels that differs of about 1 V. Further, three different inverter circuits are explored, including resistor ladders with resistor values ranging from tens of kΩ to a few MΩ. The performance of single inverters, 3‐stage cascaded inverters and 3‐stage ring oscillators are characterized with respect to output voltage levels, propagation delay, static power consumption, voltage gain, and operational frequency window. Depending on the application, the key performance parameters of the inverter can be optimized by the specific combination of the input voltage levels and the resistor ladder values. A few of the inverters are in fact fully functional up to 30 Hz, even when using input voltage levels as low as (0 V, 1 V). [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results