Rate My Professor Uli Lemmer

Professor Uli Lemmer holds the position of Professor of Electrical Engineering and Information Technology at the Karlsruhe Institute of Technology (KIT), where he directs the Light Technology Institute. He obtained his Diploma degree in Physics from RWTH Aachen University in 1990 and his Ph.D. from the University of Marburg in 1995. From 1995 to 1996, he conducted postdoctoral research at the University of California, Santa Barbara. Subsequently, he served as Group Leader in Organic Optoelectronics at Ludwig-Maximilians-Universität München from 1996 to 2002. In 2002, he was appointed full professor at KIT and assumed directorship of the Light Technology Institute. Since 2012, he has also directed the Institute of Microstructure Technology at KIT. Lemmer coordinates the Karlsruhe School of Optics & Photonics (KSOP) and serves as Scientific Speaker for the Solar Energy research area within KSOP.

Lemmer's research centers on printable organic and inorganic semiconductors for optoelectronic applications. His contributions include pioneering work on the spectroscopy of conjugated polymers and organic semiconductor lasers. His team has developed highly efficient solution-processed organic solar cells, organic light-emitting devices, printed optoelectronic sensor systems, and large-area nanostructured light management foils. He has authored over 450 journal publications, accumulating more than 29,000 citations with an h-index of 89. Key publications encompass "Near-infrared imaging with quantum-dot-sensitized organic photodiodes" (Nature Photonics, 2009), "Exciton diffusion and dissociation in conjugated polymer/fullerene blends and heterostructures" (Physical Review B, 1999), and "Femtosecond energy relaxation in π-conjugated polymers" (Physical Review Letters, 1993). Among his honors are Optica Fellowship (2019), the Esther Hoffman Beller Medal (2018), and an ERC Advanced Grant (2023) for the project on origami-inspired thermoelectric generators by printing and folding. At KIT, he teaches courses on solid-state electronics, optoelectronics, polymer electronics, and photovoltaics.