A5003060831- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic and Molecular Conductors Research
- Luminescence and Fluorescent Materials
- Optical properties and cooling technologies in crystalline materials
- Organic Light-Emitting Diodes Research
- Molecular Junctions and Nanostructures
- Polymer Nanocomposite Synthesis and Irradiation
- Radiation Effects in Electronics
Friedrich-Alexander-Universität Erlangen-Nürnberg
2022-2025
Center for NanoScience
2020-2024
Ludwig-Maximilians-Universität München
2020-2024
ETH Zurich
2023
Interface engineering is crucial to achieving stable perovskite photovoltaic devices. A versatile approach developed tailor interface properties via integrating co-assembled monolayers (co-SAMs) at the p-type buried and by capping a two-dimensional (2D) layer n-type upper with vacuum quenching. Optimized co-SAMs promote coverage of hole transport layer, significantly reducing incidence leakage currents. Based on this foundation, we develop damp-heat-stable solar cells precisely tailoring...
Abstract Organic photovoltaics (OPV) now can exceed 20% power conversion efficiency in single junction solar cells. To close the remaining gap to competing technologies, both fill factor and open‐circuit voltage must be optimized. The Langevin reduction is a well‐known concept that measures degree which charge extraction favored over recombination. It therefore ideally suited as an optimization target high‐throughput workflows; however, its evaluation so far requires expert interaction....
Abstract Semiconductor nanocrystals can replace conventional bulk materials completely in displays and light‐emitting diodes. Exciton transport dominates over charge carrier for with high exciton binding energies long ligands, such as halide perovskite nanocrystal films. Here, how beneficial superlattices – nearly perfect 3D assemblies of ‐ are to is investigated. Surprisingly, the degree order not crucial individual size, which strongly influences splitting excitonic manifold into bright...
Emerging photovoltaics for outer space applications are one of the many examples where radiation hard molecular semiconductors essential. However, due to a lack general design principles, their resilience against extra-terrestrial high-energy can currently not be predicted. In this work, discovery materials is accelerated by combining strengths high-throughput, lab automation and machine learning. This way, large material library more than 130 organic hole transport automatically processed,...
Perovskite solar cells (PSCs) have recently achieved over 26% power conversion efficiency, challenging the dominance of silicon-based alternatives. This progress is significantly driven by innovations in hole transport materials (HTMs), which notably influence efficiency and stability PSCs. However, conventional organic HTMs like PTAA, although highly efficient, suffer from thermal degradation, moisture ingress, high cost. study explores potential iminodibenzyl, a moiety known for its strong...
Abstract Dumbbell‐shaped systems based on PAHs‐BODIPY‐triarylamine hybrids TM‐(01‐04) are designed as novel and highly efficient hole‐transporting materials for usage in planar inverted perovskite solar cells. BODIPY is employed a bridge between the PAH units, effects of conjugated π ‐system's covalent attachment size investigated. Fluorescence quenching, 3D fluorescence heat maps, theoretical studies support energy transfer within moieties. The extremely resistant to UVC 254 nm germicidal...
Perovskite solar cells (PSCs) have become a research hotspot since their dramatic increase in power conversion efficiency (PCE), surpassing 26% due to advances cell engineering and interfacial layers. Within the last factor, hole transporting materials play crucial role enhancing device performance stability. Among several molecular building blocks, BODIPYs are attractive for design of novel material (HTMs) outstanding photophysical charge transport properties easily tuned by synthetic...
Two-dimensional halide perovskite nanoplatelets (NPLs) have exceptional light-emitting properties, including wide spectral tunability, ultrafast radiative decays, high quantum yields (QY), and oriented emission. Due to the binding energies of electron–hole pairs, excitons are generally considered dominant species responsible for carrier transfer in NPL films. To realize efficient devices, it is imperative understand how exciton transport progresses therein. We employ spatially temporally...
In organic field-effect transistors, conductivity is achieved by electronically injected charges that form high-density accumulation layers. We report self-consistent calculations of Poisson's equation, carrier statistics, and the Drude permittivity gas at interface between semiconductors insulators. The results show carriers efficiently screen local potentials. Additionally, AC reduces electrical fields particularly frequencies several THz. This dynamic screening may affect formation large...
Semiconductor nanocrystals could replace conventional bulk materials completely in displays and light-emitting diodes. Exciton transport dominates over charge carrier for with high exciton binding energies long ligands, such as halide perovskite nanocrystal films. Here, we investigate how beneficial superlattices - nearly perfect 3D assemblies of are to transport. Surprisingly, the degree order is not crucial individual size, which strongly influences splitting excitonic manifold into bright...
Abstract Semiconductor nanocrystals could replace conventional bulk materials completely in displays and light-emitting diodes. However, the organic ligands enabling their unique optical properties, prevent current flow nanocrystal films, leaving energy transfer as only means of injecting or extracting carriers. Here, we investigate exciton diffusion halide perovskite superlattices - nearly perfect 3D assemblies. This high degree order is not crucial individual size, which affects transport...
Two-dimensional halide perovskite nanoplatelets (NPLs) have exceptional light-emitting properties, including wide spectral tunability, ultrafast radiative decays, high quantum yields (QY), and oriented emission. To realize efficient devices, it is imperative to understand how exciton transport progresses in NPL thin films. Due the binding energies of electron-hole pairs, excitons are generally considered dominant species responsible for carrier transfer. We employ spatially temporally...