Paul Weitz
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View article: A simultaneous synergistic protection mechanism in hybrid perovskite–organic multi-junctions enables long-term stable and efficient tandem solar cells
A simultaneous synergistic protection mechanism in hybrid perovskite–organic multi-junctions enables long-term stable and efficient tandem solar cells Open
Monolithic perovskite–organic tandem solar cells (P–O TSCs) establish a mutual protection system, which enables high-efficiency P–O TSCs (25.12%) to achieve exceptional operational stability, retaining over 91% after 1000-hour illumination.
View article: A Simultaneous Synergistic Protection Mechanism in Hybrid Perovskite-Organic Multi-junctions Enables Long-Term Stable and Efficient Tandem Solar Cells
A Simultaneous Synergistic Protection Mechanism in Hybrid Perovskite-Organic Multi-junctions Enables Long-Term Stable and Efficient Tandem Solar Cells Open
Perovskite-organic tandem solar cells (P-O TSCs) hold great promise for next-generation thin-film photovoltaics, with steadily improving power conversion efficiency (PCE). However, the development of optimal interconnecting layers (ICLs) r…
View article: Improved ZnO Post‐Treatment for High Performance Organic Solar Cell Materials
Improved ZnO Post‐Treatment for High Performance Organic Solar Cell Materials Open
Zinc oxide (ZnO) is a widely used electron transport layer for organic solar cells which has been optimized and established for the first generation of organic photovoltaic (OPV) materials. With the emergence of novel OPV materials which c…
View article: Fine-Tuning Donor Material Deposition with Ultrasonic Aerosol Jet Printing to Balance Efficiency and Stability in Inverted Organic Photovoltaic Devices
Fine-Tuning Donor Material Deposition with Ultrasonic Aerosol Jet Printing to Balance Efficiency and Stability in Inverted Organic Photovoltaic Devices Open
The response surface methodology (RSM) based on a Box-Behnken (BB) design of experiment (DoE) approach was performed, with the central point repeated four times to enhance statistical reliability, to systematically investigate the influenc…
View article: A High Throughput Platform to Minimize Voltage and Fill Factor Losses
A High Throughput Platform to Minimize Voltage and Fill Factor Losses Open
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 redu…
View article: Photodegradation of Organic Solar Cells under Visible Light and the Crucial Influence of Its Spectral Composition
Photodegradation of Organic Solar Cells under Visible Light and the Crucial Influence of Its Spectral Composition Open
While wavelength-dependent photodegradation of organic solar cells (OSCs) under visible light is typically discussed in terms of UV/blue light-activated phenomena, we recently demonstrated wavelength-dependent degradation rates up to 660 n…
View article: Understanding Causalities in Organic Photovoltaics Device Degradation in a Machine‐Learning‐Driven High‐Throughput Platform
Understanding Causalities in Organic Photovoltaics Device Degradation in a Machine‐Learning‐Driven High‐Throughput Platform Open
Organic solar cells (OSCs) now approach power conversion efficiencies of 20%. However, in order to enter mass markets, problems in upscaling and operational lifetime have to be solved, both concerning the connection between processing cond…
View article: Revealing Photodegradation Pathways of Organic Solar Cells by Spectrally Resolved Accelerated Lifetime Analysis
Revealing Photodegradation Pathways of Organic Solar Cells by Spectrally Resolved Accelerated Lifetime Analysis Open
A method for organic solar cell (OSC) stability testing is presented that aims to provide more unique insight into the causes of degradation patterns of OSCs. The method involves using monochromatic light at high irradiation doses to accel…
View article: Tailoring the Nature of Interface States in Efficient and Stable Bilayer Organic Solar Cells by a Transfer‐Printing Technique
Tailoring the Nature of Interface States in Efficient and Stable Bilayer Organic Solar Cells by a Transfer‐Printing Technique Open
Bulk heterojunction organic solar cells (BHJ‐OSCs) are designed to overcome inefficient charge generation and limited exciton diffusion of organic semiconductors. However, there are some disadvantages involving inherent voltage losses, mic…
View article: Molecular Oligothiophene–Fullerene Dyad Reaching Over 5% Efficiency in Single‐Material Organic Solar Cells
Molecular Oligothiophene–Fullerene Dyad Reaching Over 5% Efficiency in Single‐Material Organic Solar Cells Open
A novel donor–acceptor dyad, 4 , in which the conjugated oligothiophene donor is covalently connected to fullerene PC 71 BM by a flexible alkyl ester linker, is synthesized and applied as photoactive layer in solution‐processed single‐mate…