Upcoming Events

Functional interfaces are at the heart of energy conversion and sensing. In this talk I will give an overview of previous work from my group at the VU Amsterdam in applying spectroscopic tools [1-3] to study the properties of interfaces in emerging photovoltaics. More recently we have extended our work to design a new approach that couples impedance spectroscopy with vibrational spectroscopy to monitor temperature in disordered organic semiconductors. In this case, we exploit the temperature-dependent Raman shifts in the finger print regime to quantify self-heating in polymer diodes and measure the temperature at the surface of optically excited plasmonic particles. As an outlook, I will introduce the activities at the Fraunhofer FEP and future directions for potential cooperation between FEP and the TU Dresden.

[1] E. von Hauff, Impedance Spectroscopy for Emerging Photovoltaics, J. Phys. Chem C, 123 (2019) 11329.

[2] E. M. Hutter, T. Kirchartz, B. Ehrler, D. Cahen, E. von Hauff, Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces, Appl. Phys. Lett. Perspective, 116 (2020) 100501.

[3] D. Klotz and E. von Hauff, Impedance Spectroscopy for Perovskite Solar Cells: Characterization, Analysis, and Diagnosis, submitted