A5022363560- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Crystal Structures and Properties
- Inorganic Fluorides and Related Compounds
- Organic Light-Emitting Diodes Research
- Catalysis and Oxidation Reactions
- Magnetic and transport properties of perovskites and related materials
- Enhanced Oil Recovery Techniques
- ZnO doping and properties
- Nanocluster Synthesis and Applications
- Petroleum Processing and Analysis
- Organic Electronics and Photovoltaics
- Organic and Molecular Conductors Research
- Surfactants and Colloidal Systems
- Polyoxometalates: Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Photonic Crystals and Applications
- Thermal Expansion and Ionic Conductivity
- Coral and Marine Ecosystems Studies
- Machine Learning and ELM
- Hydrocarbon exploration and reservoir analysis
- Chemical Synthesis and Reactions
Helmholtz-Zentrum Berlin für Materialien und Energie
2020-2024
Egyptian Petroleum Research Institute
2016-2022
Queen Mary University of London
2021
Daily temperature variations induce phase transitions and lattice strains in halide perovskites, challenging their stability solar cells. We stabilized the perovskite black improved cell performance using ordered dipolar structure of β-poly(1,1-difluoroethylene) to control film crystallization energy alignment. demonstrated p-i-n cells with a record power conversion efficiency 24.6% over 18 square millimeters 23.1% 1 centimeter, which retained 96 88% after 1000 hours 1-sun maximum point...
Abstract Large datasets are now ubiquitous as technology enables higher-throughput experiments, but rarely can a research field truly benefit from the data generated due to inconsistent formatting, undocumented storage or improper dissemination. Here we extract all meaningful device peer-reviewed papers on metal-halide perovskite solar cells published so far and make them available in database. We collect over 42,400 photovoltaic devices with up 100 parameters per device. then develop...
Abstract Tin halide perovskites attract incremental attention to deliver lead‐free perovskite solar cells. Nevertheless, disordered crystal growth and low defect formation energy, related Sn(II) oxidation Sn(IV), limit the efficiency stability of Engineering processing from precursor solution preparation film crystallization is crucial tackle these issues enable full photovoltaic potential tin perovskites. Herein, ionic liquid n ‐butylammonium acetate (BAAc) used tune coordination with...
Tin-halide perovskites have great potential as photovoltaic materials, but their performance is hampered by undesirable oxidation of Sn(<sc>ii</sc>) to Sn(<sc>iv</sc>). NMR proves DMSO be a main cause oxidation.
Low toxicity and an ideal energy bandgap make two-dimensional (2D) Ruddlesden–Popper tin-based halide perovskites a promising photovoltaic material. However, the disordered crystal orientation oxidation of Sn2+ to Sn4+ still need be addressed. Here, we demonstrate that annealing FASnI3 assisted by phenyl ethylammonium chloride enables formation more ordered 2D perovskite crystals oriented vertically. We use in situ synchrotron-based grazing incident X-ray diffraction correlate higher better...
Abstract Due to their outstanding optoelectronic properties, lead-based halide perovskite materials have been applied as efficient photoactive in solution-processed solar cells. Current record efficiencies offer the promise surpass those of silicon However, uncertainty about potential toxicity and facile dissolution water requires a search for new alternative perovskite-like materials. Thanks foresight scientists experience preparation, remarkable results obtained short period time using...
Abstract Due to its outstanding optoelectronic properties, halide perovskite solar cells (PSCs) power conversion efficiency has rapidly grown 25.7%. Nonetheless, lead poisoning is a significant hurdle the deployment of (PSCs). Tin most alternative with potential due similar electric and electronic properties less hazardous nature. Yet, performance Sn‐based PSCs lags significantly below that Pb‐based Sn (II)'s easy oxidation (IV). Incorporating large‐sized organic cations form...
Perovskite materials have attracted much attention in various optoelectronics applications such as solar cells, light-emitting diodes, and photodetectors. Compared to multicrystalline films, single crystal perovskites are free of grain boundaries exhibit lower defect density, longer carrier lifetimes, diffusion distances, outstanding stability, thus having the potential show superior performances optoelectronic devices. In addition, nanostructures ideal model systems for studying fundamental...
Tin is the frontrunner for substituting toxic lead in perovskite solar cells. However, tin suffers detrimental oxidation of SnII to SnIV . Most reported strategies employ SnF2 precursor solution prevent formation. Nevertheless, working mechanism this additive remains debated. To further elucidate it, we investigate fluoride chemistry halide perovskites by complementary analytical tools. NMR analysis discloses a strong preferential affinity anions over , selectively complexing it as SnF4 Hard...
Tin is one of the most promising alternatives to lead make lead-free halide perovskites for optoelectronics. However, stability tin-based hindered by oxidation Sn(II) Sn(IV). Recent works established that dimethyl sulfoxide, which best-performing solvents processing perovskite, primary source tin oxidation. The quest a stable solvent could be game-changer in perovskites. Starting from database over 2000 solvents, we identified series 12 new suitable formamidinium iodide perovskite (FASnI3)...
Controlling the crystallization of perovskite in a thin film is essential making solar cells. Processing tin-based films from solution challenging because uncontrollable faster tin than most used lead perovskite. The best performing devices are prepared by depositing dimethyl sulfoxide it slows down assembly tin-iodine network that forms However, while seems to control crystallization, oxidizes during processing. This work demonstrates 4-(tert-butyl) pyridine can replace without oxidizing...
Interface-induced nonradiative recombination losses at the perovskite/electron transport layer (ETL) are an impediment to improving efficiency and stability of inverted (p-i-n) perovskite solar cells (PSCs). Tridecafluorohexane-1-sulfonic acid potassium (TFHSP) is employed as a multifunctional dipole molecule modify surface. The solid coordination hydrogen bonding efficiently passivate surface defects, thereby reducing recombination. induced positive between ETLs improves energy band...
Mixed tin-lead (Sn-Pb) perovskites have attracted the attention of community due to their narrow bandgap, ideal for photovoltaic applications, especially tandem solar cells. However, oxidation and rapid crystallization Sn
Abstract Novel all‐inorganic Sn‐Pb alloyed perovskites are developed aiming for low toxicity, bandgap, and long‐term stability. Among them, CsPb 1− x Sn I 2 Br is predicted as an ideal perovskite with favorable band gap, but previously demonstrated unable to convert phase by thermal annealing. In this report, a series of tunable bandgaps from 1.92 1.38 eV successfully prepared the first time via annealing temperature (60 °C). Compared pure CsPbI Br, these show superior Furthermore, novel...
Quasi-two-dimensional halide perovskites are commonly used in solar cells, as they more stable than their three-dimensional analogues. Nevertheless, it is still challenging to meet the stability requirements under high-humidity conditions. Here, we design π-conjugated carbazole (CA) cations increase water resistance of perovskite. We control crystallization kinetics by anti-solvent strategy locate hydrophobic low-⟨n⟩-value phase on surface perovskite film. The resulting CA2MA4Pb5I16 film...
Abstract Tin halide perovskites are an appealing alternative to lead perovskites. However, owing the lower redox potential of Sn(II)/Sn(IV), particularly under presence oxygen and water, accumulation Sn(IV) at surface layer will negatively impact device's performance stability. To this end, work has introduced a novel multifunctional molecule, 1,4‐phenyldimethylammonium dibromide diamine (phDMADBr), form protective on Sn‐based perovskite films. Strong interactions between phDMADBr improve...
Perovskite solar cells (PSCs) have received a great deal of attention in the science and technology field due to their outstanding power conversion efficiency (PCE), which increased rapidly from 3.9% 25.5% less than decade, comparable single crystal silicon cells. In past ten years, much progress has been made, e.g. impressive ideas advanced technologies proposed enlarge PSC stability. However, this always referred as small-area (<0.1 cm2) PSCs. Little paid preparation processes...
Abstract In 2020 dimethyl sulfoxide (DMSO), the ever‐present solvent for tin halide perovskites, was identified as an oxidant Sn II . Nonetheless, alternatives are lacking and few efforts have been devoted to replacing it. To understand this trend it is indispensable learn importance of DMSO on development perovskites. Its unique properties allowed processing compact thin‐films be integrated into perovskite solar cells. Creative approaches controlling crystallization or increasing its...
Abstract Tin halide perovskite solar cells are promising for the next generation of highly efficient photovoltaics. Their commercialization can be accelerated by increasing their stability in moisture and oxygen. Herein, an n‐type organic molecule (IO‐4Cl) is applied as interlayer between films electron transport layers p‐i‐n structured devices. The electron‐rich indacenodithieno‐[3,2‐b]thiophene enhances transport, while hydrocarbon side chains rigid conjugated backbone isolate air. It also...
All-inorganic quantum dot (QD) light-emitting diodes (AI-QLEDs) with excellent stability received enormous interest in the past few years. Nevertheless, vast energy offset and high trap density at NiOX/QDs interface limit hole injection leading to fluorescence quenching hampering performance. Here, we present self-assembled monolayers (SAMs) phosphonic acid (PA) anchoring groups modifying NiOX transport layer (HTL) tune level passivate states. This strategy facilitates owning well-aligned by...
Blue quantum dot (QD) light-emitting diodes (QLEDs) exhibit unsatisfactory operational stability and electroluminescence (EL) properties due to severe nonradiative recombination induced by large numbers of dangling bond defects charge imbalance in QD. Herein, dipolar aromatic amine-functionalized molecules with different molecular polarities are employed regulate transport passivate interfacial between QD the electron transfer layer (ETL). The results show that stronger polarity, especially...
Quasi-2D Tin Perovskites As the most promising alternative to lead halide perovskite, tin perovskite suffers from intrinsic Sn(II) instability. Incorporating large-sized organic cations forming quasi-2D structures increases stability. For this reason, in article number 2204233, Guixiang Li, Mahmoud H. Aldamasy, Meng and co-workers, discuss evaluate characteristics challenges of perovskites, propose potential research strategies for opening up new opportunities lead-free tin-based photovoltaics.
Four copolymers were prepared by copolymerization of octadecyl acrylate with maleic anhydride abbreviated as [ODM], the resulted copolymer was reacted octadecylalcohol [ODMSA], hexadecylamine [ODMCA], benzyl alcohol [ODMBA] and aniline [ODMAn]. Three oil-soluble surfactants also esterification mono, di tri ethanolamine oleic acid, [MEAO, DEAO TEAO]. These compounds purified characterized FTIR, 1H-NMR GPC. The evaluated individually mixed flow improvers pour point depressants for waxy crude...
The power conversion efficiency of the formamidinium tin iodide (FASI) solar cells constantly increases, with current record approaching 15%. literature reports a broad anomaly distribution photoluminescence (PL) peak position. PL is particularly relevant to photovoltaic applications since it directly links material's bandgap and subgap defects energy, which are crucial extracting its full potential. Herein, FASI polycrystalline thin film powder studied. It found that positions in line...