Bruno Ehrler
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View article: Facile Synthesis and On-Chip Color Tuning of CsPbBr$_{3}$@CsPbBr$_{3-x}$TFA$_{x}$ Nanoplatelets via Ion Engineering
Facile Synthesis and On-Chip Color Tuning of CsPbBr$_{3}$@CsPbBr$_{3-x}$TFA$_{x}$ Nanoplatelets via Ion Engineering Open
Metal halide perovskites (MHPs) have emerged as attractive optoelectronic materials because of high fluorescence quantum yield, broad color tunability, and excellent color purity. However, the ionic nature of MHPs makes them susceptible to…
View article: Characterization of Mobile Ions in Perovskite Solar Cells with Capacitance and Current Measurements by Approximating Drift-Diffusion Simulations
Characterization of Mobile Ions in Perovskite Solar Cells with Capacitance and Current Measurements by Approximating Drift-Diffusion Simulations Open
The migration of mobile ions is one of the leading causes of the degradation of perovskite solar cells. However, quantifying mobile ions in complete perovskite solar cells is challenging due to the complex device stacks and the impact of c…
View article: Hysteresis in Perovskite Devices: Understanding the Abrupt Resistive Switching Mechanism
Hysteresis in Perovskite Devices: Understanding the Abrupt Resistive Switching Mechanism Open
Halide perovskite devices exhibit diverse current-voltage hysteresis behaviors, driven by distinct mechanisms that can enhance or hinder performance, making their understanding crucial. Among these, abrupt switching is particularly relevan…
View article: Intensity-Modulated Photoluminescence Spectroscopy for Revealing Ionic Processes in Halide Perovskites
Intensity-Modulated Photoluminescence Spectroscopy for Revealing Ionic Processes in Halide Perovskites Open
Mobile ions limit halide perovskite device performance, yet quantifying ionic properties remains challenging. Frequency-domain electrical techniques are restricted to operational devices, and the resulting signals are often dominated by in…
View article: Reducing the MAPbI3 microstrain by fast crystallization
Reducing the MAPbI3 microstrain by fast crystallization Open
Control over perovskite crystal growth, resulting in thin film morphology, has been at the very foundation of the evolution of perovskite photovoltaics (PVs). Methylammonium lead triiodide (MAPbI3) perovskite has been the workhorse materia…
View article: How Many Mobile Ions Can Electrical Measurements Detect in Perovskite Solar Cells?
How Many Mobile Ions Can Electrical Measurements Detect in Perovskite Solar Cells? Open
In recent years, mobile ions have been assigned to various degradation mechanisms in perovskite solar cells. Some of these include nonreversible degradation, like migration into charge transport layers (CTLs) (1) or reaction with electrode…
View article: Optics for Terawatt-Scale Photovoltaics – Review and Perspectives
Optics for Terawatt-Scale Photovoltaics – Review and Perspectives Open
Photovoltaics—a mature technology—is set to play a vital role in achieving a carbon-free energy system. This article examines the pivotal role of optics in advancing photovoltaics. We identify key scientific research areas where the optics…
View article: Circularly polarized electroluminescence from chiral supramolecular semiconductor thin films
Circularly polarized electroluminescence from chiral supramolecular semiconductor thin films Open
Current organic light-emitting diode (OLED) technology uses light-emitting molecules in a molecular host. We report green circularly polarized luminescence (CPL) in a chirally ordered supramolecular assembly, with 24% dissymmetry in a tria…
View article: Optics for Terawatt-Scale Photovoltaics – Review and Perspectives
Optics for Terawatt-Scale Photovoltaics – Review and Perspectives Open
Photovoltaics—a mature technology—is set to play a vital role in achieving a carbon-free energy system. This article examines the pivotal role of optics in advancing photovoltaics. We identify key scientific research areas where the optics…
View article: Optics for Terawatt-Scale Photovoltaics – Review and Perspectives
Optics for Terawatt-Scale Photovoltaics – Review and Perspectives Open
Photovoltaics—a mature technology—is set to play a vital role in achieving a carbon-free energy system. This article examines the pivotal role of optics in advancing photovoltaics. We identify key scientific research areas where the optics…
View article: Optics for terawatt-scale photovoltaics: review and perspectives
Optics for terawatt-scale photovoltaics: review and perspectives Open
Photovoltaics, a mature technology, is set to play a vital role in achieving a carbon-free energy system. This article examines the pivotal role of optics in advancing photovoltaics. We identify key scientific research areas where the opti…
View article: Integrated artificial neurons from metal halide perovskites
Integrated artificial neurons from metal halide perovskites Open
We report a fully on-chip integrated spiking neuron of halide perovskite. Our neuron could be implemented in hardware neural networks that perform certain computational tasks orders of magnitude more energy-efficiently than conventional co…
View article: Integrated Artificial Neurons from Metal Halide Perovskites
Integrated Artificial Neurons from Metal Halide Perovskites Open
Hardware neural networks could perform certain computational tasks orders of magnitude more energy-efficiently than conventional computers. Artificial neurons are a key component of these networks and are currently implemented with electro…
View article: Consistent Interpretation of Time- and Frequency-Domain Traces of Ion Migration in Perovskite Semiconductors
Consistent Interpretation of Time- and Frequency-Domain Traces of Ion Migration in Perovskite Semiconductors Open
The migration of mobile ions through the metal halide perovskite layer is still one of the main reasons for the poor stability of perovskite solar cells, LEDs, and photodetectors. To characterize mobile ions in the perovskite layer, time- …
View article: Scalable Microscale Artificial Synapses of Lead Halide Perovskite with Femtojoule Energy Consumption
Scalable Microscale Artificial Synapses of Lead Halide Perovskite with Femtojoule Energy Consumption Open
The efficient conduction of mobile ions in halide perovskites is highly promising for artificial synapses (or memristive devices), devices with a conductivity that can be varied by applying a bias voltage. Here we address the challenge of …
View article: Atmospheric Exposure Triggers Light-Induced Degradation in 2D Lead-Halide Perovskites
Atmospheric Exposure Triggers Light-Induced Degradation in 2D Lead-Halide Perovskites Open
Quasi-2D perovskites have been pivotal in recent efforts to stabilize perovskite solar cells. Despite the stability boost provided when these materials are introduced in perovskite solar cells, little is known about the intrinsic light and…
View article: Circularly polarised electroluminescence from chiral excitons in vacuum-sublimed supramolecular semiconductor thin films
Circularly polarised electroluminescence from chiral excitons in vacuum-sublimed supramolecular semiconductor thin films Open
Materials with chiral electronic structures are of great interest. We report a triazatruxene, TAT, molecular semiconductor with chiral alkyl side chains that crystallises from solution to form chirally-stacked columns with a helical pitch …
View article: Temporal Dynamics of Collective Resonances in Periodic Metasurfaces
Temporal Dynamics of Collective Resonances in Periodic Metasurfaces Open
Temporal dynamics of confined optical fields can provide valuable insights into light-matter interactions in complex optical systems, going beyond their frequency-domain description. Here, we present a new experimental approach based on in…
View article: Hysteresis and Its Correlation to Ionic Defects in Perovskite Solar Cells
Hysteresis and Its Correlation to Ionic Defects in Perovskite Solar Cells Open
Ion migration has been reported to be one of the main reasons for hysteresis in the current-voltage (J-V) characteristics of perovskite solar cells. We investigate the interplay between ionic conduction and hysteresis types by studying Cs0…
View article: Tuning the Optical and Structural Properties of Halide Perovskite by PbS Quantum Dot Additive Engineering for Enhanced Photovoltaic Performances
Tuning the Optical and Structural Properties of Halide Perovskite by PbS Quantum Dot Additive Engineering for Enhanced Photovoltaic Performances Open
The combination of inorganic PbS quantum dots (QDs) and lead halide perovskite in one nanocomposite is considered as a promising approach to overcoming the limitations of metastable perovskites. However, to date, only a few examples of imp…
View article: Helical interfacial modulation for perovskite photovoltaics
Helical interfacial modulation for perovskite photovoltaics Open
Helical modulators improve the operational stability of perovskite solar cells without a significant effect on photovoltaic characteristics, challenging the role of chiral interfacial modulators in hybrid perovskite photovoltaics.
View article: Transient High-Harmonic Spectroscopy in an Inorganic–Organic Lead Halide Perovskite
Transient High-Harmonic Spectroscopy in an Inorganic–Organic Lead Halide Perovskite Open
High-harmonic generation is the frequency upconversion of an intense femtosecond infrared laser in a material. In condensed-phase high-harmonic generation, laser-driven currents of coherently excited charge carriers map the electronic stru…
View article: Impact of Mobile Ions on Transient Capacitance Measurements of Perovskite Solar Cells
Impact of Mobile Ions on Transient Capacitance Measurements of Perovskite Solar Cells Open
Mitigating the migration of mobile ions within perovskite solar cells is a crucial step on the way to improving their stability. In the past, transient capacitance measurements were applied to extract information about mobile ions, includi…
View article: Perovskite Solar Modules for the Residential Sector
Perovskite Solar Modules for the Residential Sector Open
Perovskite solar cells have received tremendous attention within the solar research field in the past decade, due to their outstanding optoelectronic qualities (1,2) as well as the exciting prospect of low-cost processing, for instance, wi…
View article: Host–Guest Complexation in Wide Bandgap Perovskite Solar Cells
Host–Guest Complexation in Wide Bandgap Perovskite Solar Cells Open
Wide‐bandgap hybrid halide perovskites are increasingly relevant in the fabrication of tandem solar cells. However, their efficiency and stability during operation are still limited by several factors, among which ion migration at the inte…
View article: Host-guest complexation in wide bandgap perovskite solar cells
Host-guest complexation in wide bandgap perovskite solar cells Open
Wide bandgap hybrid halide perovskites are increasingly relevant in the fabrication of tandem solar cells. However, their efficiency and stability during operation are still limited by several factors, among which ion migration at the inte…
View article: Host-guest complexation in wide bandgap perovskite solar cells
Host-guest complexation in wide bandgap perovskite solar cells Open
Wide bandgap hybrid halide perovskites are increasingly relevant in the fabrication of tandem solar cells. However, their efficiency and stability during operation are still limited by several factors, among which ion migration at the inte…
View article: Correction to “Toward Improving Triplet Energy Transfer from Tetracene to Silicon Using a Covalently Bound Tetracene Seed Layer”
Correction to “Toward Improving Triplet Energy Transfer from Tetracene to Silicon Using a Covalently Bound Tetracene Seed Layer” Open
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Toward Improving Triplet Energy Transfer from Tetracene to Silicon Using a Covalently Bound Tetracene Seed Layer"Alyssa F. J.…