Photovoltaik (IEK-5)

Capacitance measurements are commonly used to estimate defect densities in a solar cell. Ravishankar et al. show that for a solar cell comprising of multiple layers, the traditional analysis of capacitance data is erroneous because the capacitance response of the absorber layer is hidden by overlapping responses from the other layers.

Coupling of photovoltaic (PV) devices with energy storage such as batteries is essential to stabilize PV electricity supply.

with perovskite solar modules and sodium-ion batteries

Comparing efficiencies of solar cells for indoor applications is challenging due to the variety of light sources and lack of standards. Lübke et al. show a solution to this problem that allows comparison of data measured with a variety of different light sources.

All-inorganic perovskites, which replace the organic A-site cation with inorganic elements, are promising candidates for photovoltaics due to their improved stability relative to hybrid perovskites. Here Yuan et al. review the state-of-the-art of all-inorganic perovskites for photovoltaic applications by performing detailed meta-analyses of key performance parameters on the cell and material level.

Lifetimes of charge carriers are a key metric to quantify recombination in solar cells. However, due to different measurement modes, the word “lifetime” might mean many different things thereby making quantitative comparisons impossible. Here a consistent model for transient spectroscopy analysis is shown to solve this problem.

Recombination is one of the major loss processes in any solar cell. Solar cell optimiation therefore relies on characterization techniques to quantify recombination. Here a new approach is proposed based on voltage dependent photoluminescence.

Capacitance measurements are commonly used to estimate defect densities in a solar cell. Ravishankar et al. show that for a solar cell comprising of multiple layers, the traditional analysis of capacitance data is erroneous because the capacitance response of the absorber layer is hidden by overlapping responses from the other layers.