My research activities are concerned with unravelling the electronic properties of semiconductors and organic materials used for device applications for the conversion and storage of solar energy. I use electron paramagnetic (spin) resonance (EPR, ESR) techniques, fluorescence spectroscopy, atomic force microscopy or synchrotron-based characterization to identify nanoscopic processes that limit device efficiency. In addition, my team and I develop novel spin sensors that enable spin detection using EPR-on-a-Chip. In addition, we develop and use NV centers in diamond for single spin and local magnetic field sensing on the nanometer level.

The main methods that we use for our investigations are

    • Continuous-wave electron spin resonance (cw ESR) and time-domain ESR in a frequency range from MHz to THz
    • Electrically and optically detected magnetic resonance (EDMR and ODMR) detection in both continuous-wave and time-domain
    • EPR-on-a-Chip
    • Nuclear Magnetic Resonance (NMR)
    • Atomic Force Mircoscopy (AFM)
    • Continous-wave and time-resolved flourescence spectroscopy

Short CV

Klaus Lips is Professor for Physics at the Freie Universität Berlin (FUB); Germany and holds two Adjunct Professorships at the University of Utah, Salt Lake City, USA and Monash University, Melbourne, Australia. He is heading the department Spins in Energy Materials and Quantum Information Science (ASPIN) at the Helmholtz-Zentrum Berlin für Materialien und Energie, HZB in Berlin and is speaker and coordinator of a large German research network devoted to the development and application of the EPRoC technology (Electron Paramagnetic Resonance on a Chip). Klaus studied physics at the University of Leiden, (Netherlands) and University of Marburg (Germany), where he received his PhD in 1994. He worked at the National Renewable Energy Laboratory (NREL), Colorado, USA and joined Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) in 1996. His research interests are transport and defect states in semiconductor materials, novel solar cell technologies, and the application and development of new EPR- and NMR-based techniques for material research and detection of ultra-small spin ensembles (quantum sensors). Klaus has pioneered electrical detection of spin coherence in silicon and is author of over 200 journal papers and holds 13 patents (several for EPRoC). Klaus has received many scientific prizes among which HZB’s Technology Transfer Prize, which was awarded in 2019 jointly also to Jens Ander (Univ. Stuttgart, Germany) for the development of EPRoC.