A5053224384- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- solar cell performance optimization
- Organic Electronics and Photovoltaics
- Quantum Computing Algorithms and Architecture
- Photovoltaic Systems and Sustainability
- Photovoltaic System Optimization Techniques
- Solid-state spectroscopy and crystallography
- Geochemistry and Elemental Analysis
- Organic Light-Emitting Diodes Research
- Quantum Information and Cryptography
- Electrochemical Analysis and Applications
- Paleontology and Stratigraphy of Fossils
- Geomagnetism and Paleomagnetism Studies
- Quantum Mechanics and Applications
University of Oxford
2021-2024
University of Potsdam
2022-2024
Institute for Atomic and Molecular Physics
2024
Czech Academy of Sciences, Institute of Physics
2022
Clarendon College
2022
École Polytechnique Fédérale de Lausanne
2019
Eindhoven University of Technology
2016
In this work, we couple theoretical and experimental approaches to understand reduce the losses of wide bandgap Br-rich perovskite pin devices at open-circuit voltage (VOC) short-circuit current (JSC) conditions. A mismatch between internal quasi-Fermi level splitting (QFLS) external VOC is detrimental for these devices. We demonstrate that modifying top-surface with guanidinium-Br imidazolium-Br forms a low-dimensional phase n-interface, suppressing QFLS-VOC mismatch, boosting VOC....
Abstract The presence of mobile ions in metal halide perovskites has been shown to adversely affect the intrinsic stability perovskite solar cells (PSCs). However, actual contribution total degradation loss compared with other factors such as trap-assisted recombination remains poorly understood. Here we reveal that ion-induced internal field screening is dominant factor PSCs under operational conditions. increased leads a decrease steady-state efficiency, often owing large reduction current...
Abstract Efficient mixed metal lead‐tin halide perovskites are essential for the development of all‐perovskite tandem solar cells, however they currently limited by significant short‐circuit current losses despite their near optimal bandgap (≈1.25 eV). Herein, origin these is investigated, using a combination voltage dependent photoluminescence (PL) timeseries and various charge extraction measurements. It demonstrated that Pb/Sn‐perovskite devices suffer from reduction in efficiency within...
Perovskite semiconductors differ from most inorganic and organic due to the presence of mobile ions in material. Although phenomenon is intensively investigated, important questions such as exact impact on steady‐state power conversion efficiency (PCE) stability remain. Herein, a simple method proposed estimate loss via “fast‐hysteresis” measurements by preventing perturbation out their equilibrium position at fast scan speeds (1000 V s −1 ). The “ion‐free” PCE between 1% 3% higher than PCE,...
Abstract Understanding performance losses in all‐perovskite tandem photovoltaics is crucial to accelerate advancements toward commercialization, especially since these devices generally underperform comparison what expected from isolated layers and single junction devices. Here, the individual sub‐cells stacks are selectively characterized disentangle various losses. It found that non‐radiative high‐gap subcell dominate overall recombination baseline system, as well majority of literature...
Abstract Among various types of perovskite‐based tandem solar cells (TSCs), all‐perovskite TSCs are particular attractiveness for building‐ and vehicle‐integrated photovoltaics, or space energy areas as they can be fabricated on flexible lightweight substrates with a very high power‐to‐weight ratio. However, the efficiency tandems is lagging far behind their rigid counterparts primarily due to challenges in developing efficient wide‐bandgap (WBG) perovskite well low open‐circuit voltage ( V...
Abstract Perovskite solar cells have demonstrated low non‐radiative voltage losses and open‐circuit voltages ( V OC s) that often match the internal in perovskite layer, i.e. quasi‐Femi level splitting (QFLS). However, many cases, differs remarkably from voltage, for example devices without perfect energy alignment. In terms of recombination losses, this loss outweighs all observed photoluminescence quantum efficiency measurements by orders magnitude. As such, understanding phenomenon is...
Abstract Outstanding optoelectronic properties of mixed tin‐lead perovskites are the cornerstone for development high‐efficiency all‐perovskite tandems. However, recombination losses in Sn‐Pb still limit performance these perovskites, necessitating more fundamental research. Here, rubidium iodide is employed as an additive methylammonium‐free perovskites. It first investigated effect RbI on perovskite composition, crystal structure, and element distribution. Quasi‐Fermi level splitting...
Abstract All‐perovskite tandem solar cells show great potential to enable the highest performance at reasonable costs for a viable market entry in near future. In particular, wide‐bandgap (WBG) perovskites with higher open‐circuit voltage ( V OC ) are essential further improve cells’ performance. Here, new 1.8 eV bandgap triple‐halide perovskite composition conjunction piperazinium iodide (PI) surface treatment is developed. With structural analysis, it found that PI modifies through...
Here, we report a detailed surface analysis of dry- and ambient air-annealed CsPbI
Abstract Photovoltaics (PVs) are a critical technology for curbing growing levels of anthropogenic greenhouse gas emissions, and meeting increases in future demand low-carbon electricity. In order to fulfill ambitions net-zero carbon dioxide equivalent (CO 2 eq) emissions worldwide, the global cumulative capacity solar PVs must increase by an magnitude from 0.9 TW p 2021 8.5 2050 according International Renewable Energy Agency, which is considered be highly conservative estimate. 2020, Henry...
Traditional inorganic semiconductors can be electronically doped with high precision. Conversely, there is still conjecture regarding the assessment of electronic doping density in metal-halide perovskites, not to mention a control thereof. This paper presents multifaceted approach determine for range different lead-halide perovskite systems. Optical and electrical characterization techniques, comprising intensity-dependent transient photoluminescence, AC Hall effect,...
Mobile ions in perovskite photovoltaic devices can hinder performance and cause degradation by impeding charge extraction screening the internal field. Accurately quantifying mobile ion densities remains a challenge is highly debated topic. We assess suitability of several experimental methodologies for determining using drift-diffusion simulations. found that linearly increasing voltage (CELIV) underestimates density, but bias-assisted (BACE) accurately reproduce ionic lower than electrode...
Abstract Living organisms can produce inorganic materials with unique structure and properties. The biomineralization process is of great interest as it forms a source inspiration for the development methods production diverse under mild conditions. Nonetheless, regulation still challenging task. Magnetotactic bacteria chains prokaryotic organelle comprising membrane-enveloped single-crystal magnetite species-specific morphology. Here, we describe through controlled expression mms7 gene,...
We propose efficient algorithms with logarithmic step complexities for the generation of entangled $GHZ_N$ and $W_N$ states useful quantum networks, we demonstrate an implementation on IBM computer up to $N=16$. Improved quality is then investigated using full tomography low-$N$ GHZ W states. This completed by parity oscillations histogram distance large $N$ respectively. are capable robustly build about twice number bits which were previously achieved. Finally attempt error correction...
Abstract The stability of perovskite‐based tandem solar cells (TSCs) is the last major scientific/technical challenge to be overcome before commercialization. Understanding impact mobile ions on TSC performance key minimizing degradation. Here, a comprehensive study that combines an experimental analysis ionic losses in Si/perovskite and all‐perovskite TSCs using scan‐rate‐dependent current–voltage ( J–V ) measurements with drift‐diffusion simulations presented. findings demonstrate have...
Abstract In the last decade, perovskite semiconductors have triggered a revolution in solar cell research. However, critical issues remain concerning stability of metal-halide perovskites, which need to be overcome enable large scale commercialisation photovoltaics (PV). While rather poor environmental these perovskites is usually attributed their ionic nature rendering them sensitive moisture and oxygen, actual contribution mobile ions total degradation loss under different conditions...
Photovoltaics (PVs) are a critical technology for curbing growing levels of anthropogenic greenhouse gas emissions, and meeting increases in future demand low-carbon electricity. In order to fulfil ambitions net-zero carbon dioxide equivalent (CO<sub>2</sub>eq) emissions worldwide, the global cumulative capacity solar PVs must increase by an magnitude from 0.9 TWp 2021 8.5 2050 according International Renewable Energy Agency, which is considered be highly conservative estimate. 2020, Henry...
Traditional inorganic semiconductors can be electronically doped with high precision. Conversely, there is still conjecture regarding the assessment of electronic doping density in metal-halide perovskites, not to mention a control thereof. This paper presents multifaceted approach determine for range different lead-halide perovskite systems. Optical and electrical characterisation techniques comprising intensity-dependent transient photoluminescence, AC Hall effect, transfer-length-methods,...
Among various types of perovskite-based tandem solar cells (TSCs), all-perovskite TSCs are particular attractiveness for building- and vehicle-integrated photovoltaics, or space energy areas as they can be fabricated on flexible lightweight substrates with a very high power-to-weight ratio. However, the efficiency tandems is lagging far behind their rigid counterparts primarily due to challenges in developing efficient wide-bandgap (WBG) perovskite well low open-circuit voltage (VOC) WBG...
Device physics and engineering Chair introduction - Jarla ThiesbrummelJarla Thiesbrummel aa AMOLF, Science Park, 102, Amsterdam, NetherlandsInternational Conference on Hybrid Organic PhotovoltaicsProceedings of International Photovoltaics (HOPV24)València, Spain, 2024 May 12th 15thOrganizer: Bruno EhrlerContributed talk, Thiesbrummel, presentation 243DOI: https://doi.org/10.29363/nanoge.hopv.2024.243Publication date: 6th February Session 3B1 © FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe...
Ion induced field screening governs the early performance degradation of perovskite solar cellsJarla Thiesbrummel a, b, c, Sahil Shah Henry Snaith Martin Stolterfoht da AMOLF, Science Park, 102, Amsterdam, Netherlandsb Clarendon Laboratory, University Oxford, Parks Road, Oxford OX1 3PU, United Kingdomc Soft Matter Physics and Optoelectronics, Institute Astronomy, Potsdam, Germanyd The Chinese Hong Kong, Electronic Engineering Department, Shatin N.T., Kong SARInternational Conference on...