Ramesh Kumar

Photo-Iontronics (π)

Exploring π-powered devices: where light, ions, and electrons meet

Dr. Ramesh Kumar

Young Investigator Group preparation Fellow, at Karlsruhe Institute of Technology, Germany.

Alexander von Humboldt Research Fellow, Institute for Microsensors, Actuators and Systems, Uni-Bremen, Germany

& Visiting Postdoctoral Researcher at Ångström Laboratory, Uppsala University, Sweden

About me

I am a Fellow of the Young Investigator Group Preparation Program at the Karlsruhe Institute of Technology (KIT), preparing to establish an independent research group focused on halide perovskites beyond traditional optoelectronics. My work leverages mixed electronic–ionic conduction for applications in neuromorphic computing and bifunctional energy storage systems.

Previously, I was an Alexander von Humboldt Research Fellow (2024–2026) at the Institut für Mikrosensoren, -aktoren und -systeme, University of Bremen, Germany, where I investigated ion dynamics in organic electrochemical transistors (OECTs)—a frontier field at the interface of organic electronics and electrochemistry. I also held a postdoctoral position at Uppsala University, Sweden, in the Boschloo-Johansson group, working on lead-free, perovskite-inspired materials for solar energy applications.

My expertise spans the design and synthesis of organic–inorganic mixed electronic–ionic semiconductors, from lead halide perovskites to lead-free perovskite-inspired materials, and extends to optoelectronic and opto(electro)ionic devices such as solar cells, memristive systems (2-T and 3-T), and photo-ion capacitors, with a focus on energy-efficient edge computing and IoT applications.

Honors and Fellowships

Selected for Lindau Nobel Laureate Meeting 2026 (Interdisciplinary)
Young Investigator Group Preparation Grant, Karlsruhe Institute of Technology (2026-2028)
Alexander von Humboldt Research Fellowship, AvH Foundation, Germany (2024–2026).
Swedish Postdoctoral Fellowship, Olle Engkvist Foundation, Sweden (2023–2025).
Commonwealth Scholarship, UK Government (2022–2023).
PhD Scholarship, Government of India (2017-2022)
Travel Grants, IIT Roorkee 2020.

Latest Research articles (Postdoc work)

Research highlights on Cover @ Photo-Caps

Ph.D. Thesis Publications (Selected Articles)