René A. J. Janssen
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View article: Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr <sub>3</sub> Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting
Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr <sub>3</sub> Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting Open
Wide‐bandgap perovskite solar cells (PSCs) based on formamidinium lead bromide (FAPbBr 3 ) hold promise for unassisted solar‐driven water splitting using a single‐junction absorber. To meet the required thermodynamic voltage and overpotent…
View article: Aromatic Diester Anolytes for Nonaqueous Redox Flow Batteries
Aromatic Diester Anolytes for Nonaqueous Redox Flow Batteries Open
Nonaqueous redox flow batteries require highly‐soluble and easy‐to‐synthesize organic redox‐active molecules that offer deep reduction or high oxidation potentials and that are stable in each state of charge. Herein, aromatic diesters for …
View article: Supra-3-V Nonaqueous Redox-Flow Batteries Based on Simple Terephthalonitrile Anolytes
Supra-3-V Nonaqueous Redox-Flow Batteries Based on Simple Terephthalonitrile Anolytes Open
Organic molecules for nonaqueous redox-flow batteries tend to become increasingly complex because, for practical applications, they have to fulfill several requirements in terms of redox potential, solubility, and stability. Implementing t…
View article: The Importance of Conserving the Stoichiometry of Wide-Bandgap Perovskites in Additive Engineering
The Importance of Conserving the Stoichiometry of Wide-Bandgap Perovskites in Additive Engineering Open
Additive engineering is among the most commonly used strategies to enhance the performance and stability of perovskite solar cells. Prior research often focused on optimizing device performance by using additives in the perovskite precurso…
View article: Analysis of Interfacial Losses and Passivation Strategies for Narrow‐Bandgap Perovskite Solar Cells
Analysis of Interfacial Losses and Passivation Strategies for Narrow‐Bandgap Perovskite Solar Cells Open
Tin‐lead (Sn–Pb) halide perovskites hold promise as narrow‐bandgap semiconductors in future solar cells. Currently, non‐radiative recombination induced open‐circuit voltage losses limit their full potential. To determine their origin, intr…
View article: Spectroelectrochemical Determination of Förster Radii for Triplet‐Polaron Quenching in Phosphorescent Organic Light‐Emitting Diodes
Spectroelectrochemical Determination of Förster Radii for Triplet‐Polaron Quenching in Phosphorescent Organic Light‐Emitting Diodes Open
The quantum efficiency of phosphorescent organic light‐emitting diodes (OLEDs) shows a decrease with increasing current density and luminance (“roll‐off”). A major contribution to the roll‐off is triplet‐polaron quenching (TPQ), upon which…
View article: New Highly Sulfonated Polythioethers as Polyelectrolyte Membranes for Water Electrolysis
New Highly Sulfonated Polythioethers as Polyelectrolyte Membranes for Water Electrolysis Open
Herein, the synthesis and characterization of highly sulfonated poly(arylene thioethers) for application as polymer electrolyte membranes in water electrolysis are reported. In a first step, poly(arylene thioethers) were obtained by using …
View article: Exposing binding-favourable facets of perovskites for tandem solar cells
Exposing binding-favourable facets of perovskites for tandem solar cells Open
Controlling the growth of polycrystalline perovskite films to achieve a favourable termination can significantly reduce interfacial losses and enhance the output voltage in wide-bandgap and all-perovskite tandem solar cells.
View article: Point contacts in halide perovskite solar cells: from reduced interfacial recombination to increased ionic field screening
Point contacts in halide perovskite solar cells: from reduced interfacial recombination to increased ionic field screening Open
Inserting point contacts between the perovskite and C 60 layers reduces the interfacial recombination. However, the accumulation of mobile ions at the point contacts can decrease the device stability.
View article: Functionalized Substrates for Reduced Nonradiative Recombination in Metal-Halide Perovskites
Functionalized Substrates for Reduced Nonradiative Recombination in Metal-Halide Perovskites Open
Reducing nonradiative recombination is crucial for minimizing voltage losses in metal-halide perovskite solar cells and achieving high power conversion efficiencies. Photoluminescence spectroscopy on complete or partial perovskite solar ce…
View article: Steering perovskite precursor solutions for multijunction photovoltaics
Steering perovskite precursor solutions for multijunction photovoltaics Open
Multijunction photovoltaics (PVs) are gaining prominence owing to their superior capability of achieving power conversion efficiencies (PCEs) beyond the radiative limit of single-junction cells 1–8 , for which improving narrow-bandgap (NBG…
View article: Diverse but declining? Population genetic structure and genetic diversity of Nathusius’ pipistrelle along the Dutch coastline during the autumn migration period
Diverse but declining? Population genetic structure and genetic diversity of Nathusius’ pipistrelle along the Dutch coastline during the autumn migration period Open
Migratory bats are experiencing substantial increases in mortality risk from wind energy developments, but data on their migratory behavior and population dynamics are often lacking. Here, we develop a novel microsatellite panel for one su…
View article: Device Performance of Emerging Photovoltaic Materials (Version 5)
Device Performance of Emerging Photovoltaic Materials (Version 5) Open
This 5th annual “ Emerging PV Report” highlights the latest advancements in the performance of emerging photovoltaic (e‐PV) devices across various e‐PV research areas, as documented in peer‐reviewed articles published since August 2023. Up…
View article: Unraveling the Positive Effects of Glycine Hydrochloride on the Performance of Pb–Sn‐Based Perovskite Solar Cells
Unraveling the Positive Effects of Glycine Hydrochloride on the Performance of Pb–Sn‐Based Perovskite Solar Cells Open
Additives are commonly used to increase the performance of metal‐halide perovskite solar cells, but detailed information on the origin of the beneficial outcome is often lacking. Herein, the effect of glycine hydrochloride is investigated …
View article: Local halide heterogeneity drives surface wrinkling in mixed-halide wide-bandgap perovskites
Local halide heterogeneity drives surface wrinkling in mixed-halide wide-bandgap perovskites Open
Compositional heterogeneity in wide-bandgap (1.8 − 2.1 eV) mixed-halide perovskites is a key bottleneck in the processing of high-quality solution-processed thin films, and prevents their application in efficient multijunction solar cells.…
View article: Computational and Machine Learning‐Assisted Discovery and Experimental Validation of Conjugated Sulfonamide Cathodes for Lithium‐Ion Batteries
Computational and Machine Learning‐Assisted Discovery and Experimental Validation of Conjugated Sulfonamide Cathodes for Lithium‐Ion Batteries Open
Conjugated sulfonamides (CSAs) stand out for their propitious electroactivity and notable stability in ambient conditions, making them suitable candidates for high‐potential cathode materials in lithium‐ion batteries (LIBs). This study emp…
View article: Polymorph‐Dependent Multi‐Level Supramolecular Self‐Assembly and Local Charge Transport of a Conjugated Polymer in Solution and Solid States
Polymorph‐Dependent Multi‐Level Supramolecular Self‐Assembly and Local Charge Transport of a Conjugated Polymer in Solution and Solid States Open
The polymorphic behavior of conjugated polymers enables tunable optoelectronic properties, but their transport mechanism remains elusive due to the inherent complexity and uncontrollability of polymorphic self‐assembly behaviors and electr…
View article: Identifying the Nature and Location of Defects in n–<i>i</i>–p Perovskite Cells with Highly Sensitive Sub‐Bandgap Photocurrent Spectroscopy
Identifying the Nature and Location of Defects in n–<i>i</i>–p Perovskite Cells with Highly Sensitive Sub‐Bandgap Photocurrent Spectroscopy Open
Defects that exist in perovskite semiconductors and at their interfaces with charge transport layers limit the performance of perovskite solar cells (PSCs). Highly sensitive photocurrent measurements reveal at least two sub‐bandgap defect …
View article: Sub-bandgap Photocurrent Spectra of p–i–n Perovskite Solar Cells with n-Doped Fullerene Electron Transport Layers and Bias Illumination
Sub-bandgap Photocurrent Spectra of p–i–n Perovskite Solar Cells with n-Doped Fullerene Electron Transport Layers and Bias Illumination Open
In p-i-n perovskite solar cells optical excitation of defect states at the interface between the perovskite and fullerene electron transport layer (ETL) creates a photocurrent responsible for a distinct sub-bandgap external quantum efficie…
View article: Semitransparent organic solar cells with high light utilization efficiency and color rendering index
Semitransparent organic solar cells with high light utilization efficiency and color rendering index Open
Semitransparent organic solar cells (ST-OSCs) have garnered considerable attention as promising renewable energy technology for integrating photovoltaics into buildings. However, there is a trade-off between power conversion efficiency (PC…
View article: Quantifying Non‐Radiative Recombination in Passivated Wide‐Bandgap Metal Halide Perovskites Using Absolute Photoluminescence Spectroscopy
Quantifying Non‐Radiative Recombination in Passivated Wide‐Bandgap Metal Halide Perovskites Using Absolute Photoluminescence Spectroscopy Open
Wide‐bandgap (>1.6 eV) mixed‐halide perovskites tend to experience notable open‐circuit voltage losses in solar cells due to non‐radiative recombination. Here, the effects of defects and their passivation on the non‐radiative recombination…
View article: Effect of sub-bandgap defects on radiative and non-radiative open-circuit voltage losses in perovskite solar cells
Effect of sub-bandgap defects on radiative and non-radiative open-circuit voltage losses in perovskite solar cells Open
The efficiency of perovskite solar cells is affected by open-circuit voltage losses due to radiative and non-radiative charge recombination. When estimated using sensitive photocurrent measurements that cover the above- and sub-bandgap reg…
View article: Axial–Equatorial Halide Ordering in Layered Hybrid Perovskites from Isotropic–Anisotropic <sup>207</sup>Pb NMR
Axial–Equatorial Halide Ordering in Layered Hybrid Perovskites from Isotropic–Anisotropic <sup>207</sup>Pb NMR Open
Bandgap‐tuneable mixed‐halide 3D perovskites are of interest for multi‐junction solar cells, but suffer from photoinduced spatial halide segregation. Mixed‐halide 2D perovskites are more resistant to halide segregation and are promising co…
View article: Axial–Equatorial Halide Ordering in Layered Hybrid Perovskites from Isotropic–Anisotropic <sup>207</sup>Pb NMR
Axial–Equatorial Halide Ordering in Layered Hybrid Perovskites from Isotropic–Anisotropic <sup>207</sup>Pb NMR Open
Bandgap‐tuneable mixed‐halide 3D perovskites are of interest for multi‐junction solar cells, but suffer from photoinduced spatial halide segregation. Mixed‐halide 2D perovskites are more resistant to halide segregation and are promising co…
View article: Enhancement of the internal quantum efficiency in strongly coupled P3HT-C<sub>60</sub> organic photovoltaic cells using Fabry–Perot cavities with varied cavity confinement
Enhancement of the internal quantum efficiency in strongly coupled P3HT-C<sub>60</sub> organic photovoltaic cells using Fabry–Perot cavities with varied cavity confinement Open
The short exciton diffusion length in organic semiconductors results in a strong dependence of the conversion efficiency of organic photovoltaic (OPV) cells on the morphology of the donor-acceptor bulk-heterojunction blend. Strong light–ma…
View article: Impact of Alkyl Chain Length on the Formation of Regular- and Reverse-Graded Quasi-2D Perovskite Thin Films
Impact of Alkyl Chain Length on the Formation of Regular- and Reverse-Graded Quasi-2D Perovskite Thin Films Open
Crystallization of low-dimensional perovskites is a complex process that leads to multidimensional films comprising two-dimensional (2D), quasi-2D, and three-dimensional (3D) phases. Most quasi-2D perovskite films possess a regular gradien…
View article: Device Performance of Emerging Photovoltaic Materials (Version 4)
Device Performance of Emerging Photovoltaic Materials (Version 4) Open
Following the 3rd release of the “Emerging PV reports” , the best achievements in the performance of emerging photovoltaic (e‐PV) devices in diverse e‐PV research subjects are summarized, as reported in peer‐reviewed articles in academic j…