972 citations · 1.6k across the 26 of their papers we have counts for
10 papers · 1 filter
A Universal Strategy of Perovskite Ink-Substrate Interaction to Overcome the Poor Wettability of a Self-Assembled Monolayer for Reproducible Perovskite Solar Cells
Ashish Kulkarni, Ranjini Sarkar, Samah Akel +6
Perovskite solar cells employing self assembled monolayers such as Me-4PACz as hole transport layer has been reported to demonstrate high device efficiency. However, the poor perov…
Fill Factor Losses and Deviations from the Superposition Principle in Lead-Halide Perovskite Solar Cells
David Grabowski, Zhifa Liu, Gunnar Schöpe +2
The enhancement of the fill factor in the current generation of perovskite solar cells is the key for further efficiency improvement. Thus, methods to quantify the fill factor loss…
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…
Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces
Eline M. Hutter, Thomas Kirchartz, Bruno Ehrler +2
Perovskite photovoltaics has witnessed an unprecedented increase in power conversion efficiency over the last decade. The choice of transport layers, through which photo-generated…
A highly integrated, stand-alone photoelectrochemical device for large-scale solar hydrogen production
Minoh Lee, Bugra Turan, Jan-Philipp Becker +9
Although photoelectrochemical water splitting is likely to be an important and powerful tool to provide environmentally friendly hydrogen, most developments in this field have been…
Requirements for functional pn-homojunctions in lead-halide perovskite solar cells
Thomas Kirchartz, David Cahen
Cui et al. describe the fabrication and characterization of planar pn-junction solar cells based on lead-halide perovskites. The doping densities measured using Hall effect measure…
Solar Energy Conversion and the Shockley-Queisser Model, a Guide for the Perplexed
Jean-Francois Guillemoles, Thomas Kirchartz, David Cahen +1
The Shockley-Queisser model is a landmark in photovoltaic device analysis by defining an ideal situation as reference for actual solar cells. However, the model and its implication…
High Open-Circuit Voltages in Lead-Halide Perovskite Solar Cells - Experiment, Theory and Open Questions
Thomas Kirchartz
One of the most significant features of lead-halide perovskites are their ability to have comparably slow recombination despite the fact that these materials are mostly processed f…
The perovskite/transport layer interfaces dominate non-radiative recombination in efficient perovskite solar cells
Martin Stolterfoht, Pietro Caprioglio, Christian M. Wolff +12
Charge transport layers (CTLs) are key components of diffusion controlled perovskite solar cells, however, they can induce additional non-radiative recombination pathways which lim…