A printable transistor architecture uses redox gating to modulate current in vanadium dioxide, enabling low power switching for flexible sensors and emerging neuromorphic hardware.
Scientists in the U.S. Department of Energy’s Argonne National Laboratory have shown how custom inks and advanced printing methods can be used to build durable, low‑power transistors. The research highlights how printed electronics may one day enable flexible sensors, smart windows, and other technologies that require reliable, energy‑saving components.
The benefit of this work is the ability to create electronic switches that last thousands of cycles while operating at very low voltages. Traditional printed devices often fail after only a handful of uses, but the Argonne team reports that their transistors can run more than 6,000 cycles without degradation. This durability, combined with low‑power operation, points to applications in areas where energy efficiency and reliability are critical.
By using vanadium dioxide, a material that can act as both conductor and insulator, the team created switches that can reliably control current flow. A process called redox gating was applied to add or remove electrons with a small voltage, less than that of a typical battery. This gentler method avoids damaging the material, allowing devices to last longer.
The researchers point to potential uses in flexible sensors, low‑power smart devices, and even neuromorphic computing, where circuits mimic the way the human brain processes information. In manufacturing, such printed components could reduce costs and enable rapid prototyping, while in consumer technologies they could support energy‑saving electronics for everyday devices.
The printed transistors operated at voltages as low as 0.4 to 0.5 volts, switched states in about one second, and boosted current flow by 50 percent with minimal energy input. The devices showed stable performance across thousands of cycles, with robust response times and the ability to be customized through 3D printing. The researchers used Argonne’s Center for Nanoscale Materials and Advanced Photon Source, along with Brookhaven’s National Synchrotron Light Source II, to refine ink formulations and analyze device structures.
Reflecting on the achievement, Argonne chemist Wei Chen says, “In previous methods, devices could only run a few times — sometimes just 10 cycles — before failing. Our devices can run thousands of cycles with no problem.”
