449 citations · 773 across the 11 of their papers we have counts for
11 papers
Photoluminescence Mapping over Laser Pulse Fluence and Repetition Rate as a Fingerprint of Charge and Defect Dynamics in Perovskites
Shraddha M Rao, Alexander Kiligaridis, Aymen Yangui +3
Defects in metal halide perovskites (MHP) are photosensitive, making the observer effect unavoidable when laser spectroscopy methods are applied. Photoluminescence (PL) bleaching a…
Towards low-temperature processing of efficient -CsPbI perovskite solar cells
Zongbao Zhang, Ran Ji, Yvonne J. Hofstetter +5
Inorganic cesium lead iodide (CsPbI) perovskite solar cells (PSCs) have attracted enormous attention due to their excellent thermal stability and optical bandgap (~1.73 eV), we…
Remarkable performance recovery in highly defective perovskite solar cells by photo-oxidation
Katelyn P. Goetz, Fabian T. F. Thome, Qingzhi An +8
Exposure to environmental factors is generally expected to cause degradation in perovskite films and solar cells. Herein, we show that films with certain defect profiles can displa…
Convert widespread paraelectric perovskite to ferroelectrics
Hongwei Wang, Fujie Tang, Massimiliano Stengel +4
While nature provides a plethora of perovskite materials, only a few exhibits large ferroelectricity and possibly multiferroicity. The majority of perovskite materials have the non…
A General Approach to High Efficiency Perovskite Solar Cells by Any Antisolvent
Alexander D. Taylor, Qing Sun, Katelyn P. Goetz +6
Deposition of perovskite thin films by antisolvent engineering is one of the most common methods employed in perovskite photovoltaics research. Herein, we report on a general metho…
Are Shockley-Read-Hall and ABC models valid for lead halide perovskites?
Alexander Kiligaridis, Pavel Frantsuzov, Aymen Yangui +5
Metal halide perovskites are an important class of emerging semiconductors. Their charge dynamics is poorly understood due to limited knowledge of defect physics and charge recombi…
Enhancing the Open-Circuit Voltage of Perovskite Solar Cells by Embedding Molecular Dipoles within their Hole-Blocking Layer
Julian F. Butscher, Sebastian Intorp, Joshua Kress +7
Engineering the energetics of perovskite photovoltaic devices through the deliberate introduction of dipoles to control the built-in potential of the devices offers the opportunity…
Effect of Precursor Stoichiometry on the Performance and Stability of MAPbBr3 Photovoltaic Devices
Lukas M. Falk, Katelyn P. Goetz, Vincent Lami +7
The wide band gap methylammonium lead bromide perovskite is promising for applications in tandem solar cells and light-emitting diodes. Despite its utility, there is only a limited…
Probing the ionic defect landscape in halide perovskite solar cells
Sebastian Reichert, Qingzhi An, Young-Won Woo +3
Point defects in metal halide perovskites play a critical role in determining their properties and optoelectronic performance; however, many open questions remain unanswered. In th…
Improved evaluation of deep-level transient spectroscopy on perovskite solar cells reveals ionic defect distribution
Sebastian Reichert, Jens Flemming, Qingzhi An +3
One of the key challenges for future development of efficient and stable metal halide perovskite solar cells is related to the migration of ions in these materials. Mobile ions hav…
Enhancing the Open-Circuit Voltage of Perovskite Solar Cells by up to 120 mV using π-Extended Phosphoniumfluorene Electrolytes as Hole Blocking Layers
Qingzhi An, Qing Sun, Andreas Weu +7
Four π-extended phosphoniumfluorene electrolytes (π-PFEs) are introduced as hole-blocking layers (HBL) in inverted architecture planar perovskite solar cells (PVSCs) with the struc…