12 citations · 13 across the 7 of their papers we have counts for
8 papers
Towards a fully differentiable digital twin for solar cells
Marie Louise Schubert, Houssam Metni, Jan David Fischbach +18
Maximizing energy yield (EY) - the total electric energy generated by a solar cell within a year at a specific location - is crucial in photovoltaics (PV), especially for emerging…
Determination of Electron Extraction in Semiconductor Photoanodes: Steady-state and Small-perturbation Response
Paola Ragonese, Chiara Maurizio, Boris Kalinic +2
This work develops an analytical model to consistently interpret the steady-state and small-perturbation response (both in the time and frequency domain) of photoanodes for solar w…
How Charge Carrier Exchange between Absorber and Contact influences Time Constants in the Frequency Domain Response of Perovskite Solar Cells
Sandheep Ravishankar, Zhifa Liu, Yueming Wang +2
A model is derived for the frequency- and time-domain opto-electronic response of perovskite solar cells (PSCs) that emphasizes the role of charge carrier exchange, .i.e. extractio…
Comparing Methods of Characterizing Energetic Disorder in Organic Solar Cells
Paula Hartnagel, Sandheep Ravishankar, Benjamin Klingebiel +2
Energetic disorder has been known for decades to limit the performance of structurally disordered semiconductors such as amorphous silicon and organic semiconductors. However, in t…
Intensity Modulated Photocurrent Microspectrosopy for Next Generation Photovoltaics
Jamie Laird, Sandheep Ravishankar, Askhkat Jumabekov +4
In this report, we describe a large-area Laser Beam Induced Current (LBIC) microscope that has been adapted to perform Intensity Modulated Photocurrent Spectroscopy in an imaging m…
Interpretation of Mott-Schottky Plots of Photoanodes for Water Splitting
Sandheep Ravishankar, Juan Bisquert, Thomas Kirchartz
A large body of literature reports that both bismuth vanadate and haematite photoanodes are semiconductors with an extremely high doping density between 10^18-10^21 cm^-3. Such val…
Multilayer Capacitances: How Selective Contacts Affect Capacitance Measurements of Perovskite Solar Cells
Sandheep Ravishankar, Zhifa Liu, Uwe Rau +1
Capacitance measurements as a function of voltage, frequency and temperature are useful tools to identify fundamental parameters that affect solar cell operation. Techniques such a…
Comment on "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells"
Sandheep Ravishankar, Thomas Unold, Thomas Kirchartz
Ni et al. report minimum bulk trap densities of 10^11 cm-3 and 1-4 orders change in interfacial trap densities derived from drive-level capacitance profiling of lead halide perovsk…