A5025303779- Perovskite Materials and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Solid-state spectroscopy and crystallography
- Thermal Expansion and Ionic Conductivity
- Quantum Dots Synthesis And Properties
- Organic and Molecular Conductors Research
- Magnetic and transport properties of perovskites and related materials
- Chalcogenide Semiconductor Thin Films
- Polyoxometalates: Synthesis and Applications
- Ferroelectric and Piezoelectric Materials
- Luminescence Properties of Advanced Materials
- Inorganic Chemistry and Materials
- Catalysis and Oxidation Reactions
- Crystal Structures and Properties
- Crystallography and molecular interactions
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Condensed Matter Physics
- Microwave Dielectric Ceramics Synthesis
- Obstructive Sleep Apnea Research
- Industrial Vision Systems and Defect Detection
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Machine Learning and ELM
- Near-Field Optical Microscopy
Uppsala University
2024-2025
KTH Royal Institute of Technology
2020-2024
Universidade da Coruña
2016-2022
Stockholm Environment Institute
2021
Zapata (United States)
2018-2020
Okinawa Institute of Science and Technology Graduate University
2018
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...
In this work, we focus on [(CH3)2NH2]PbI3, a member of the [AmineH]PbI3 series hybrid organic-inorganic compounds, reporting very easy mechanosynthesis route for its preparation at room temperature. We report that [(CH3)2NH2]PbI3 compound with 2H-perovskite structure experiences first-order transition ≈250 K from hexagonal symmetry P63/mmc (HT phase) to monoclinic P21/c (LT phase), which involves two cooperative processes: an off-center shift Pb2+ cations and order-disorder process N atoms...
We present a novel family of polyhalide salts Bi(III) with the general formula [Dim]2[Bi2X10], where Dim2+ is diimidazolium cation (C9H14N4)2+ and X Cl–, Br–, or I–. Single-phase materials are easily obtained by means mild solution chemistry method performed at room temperature. This [Dim]2[Bi2X10] exhibits crystal structure based on halobismuthate [Bi2X10]4– dimers, built distorted {BiX6} octahedra interconnected edge sharing, sandwiched between two cations. The optical band gaps displayed...
The degradation of lead halides perovskites under X-ray irradiation follows different pathways and has kinetics depending on if the radiolysis organic cation or halide cage is dominant.
[TPrA]Cd[dca]<sub>3</sub> shows giant barocaloric tunability and large effect, which are desirable for future low-pressure cooling applications.
[(CH<sub>3</sub>)<sub>2</sub>NH<sub>2</sub>]PbX<sub>3</sub>(X = Cl<sup>−</sup>and Br<sup>−</sup>) hexagonal perovskites exhibit a first order phase transition, dielectric transition and broad red light photoluminescence emission.
We report giant reversible barocaloric effects in [(CH<sub>3</sub>)<sub>4</sub>N]Mn[N<sub>3</sub>]<sub>3</sub> hybrid organic–inorganic perovskite, near its first-order cubic-monoclinic structural phase transition at <italic>T</italic><sub>0</sub> ∼ 305 K.
Lead halide perovskite solar cells have reached power conversion efficiencies during the past few years that rival those of crystalline silicon cells, and there is a concentrated effort to commercialize them. The use gold electrodes, current standard, prohibitively costly for commercial application. Copper promising low-cost electrode material has shown good stability in with selective contacts. Furthermore, it potential be self-passivating through formation CuI, copper salt which also used...
A family of Metal–Organic Frameworks (MOFs) based on the ligands pyrazine (pyz) and dicyanamide (dca) metal centers Fe, Co Ni with unit formula M(dca) 2 pyz has been studied as anodes for Li-Ion Batteries (LIBs).
Abstract To further develop lead halide perovskites for their application in solar cells, understanding the material’s fundamental behavior under illumination is necessary. Investigating light-induced charge dynamics single crystals can give insight into material inherent properties. Time-resolved photoelectron spectroscopy (TR-PES) allows to monitor photovoltage build-up and decay between sample surface bulk over time gives information on redistribution within crystal. Additionally, this...
Hybrid halide perovskites (HHPs) have attracted significant attention due to their remarkable optoelectronic properties that combine the advantages of low-cost, effective fabrication methods organic–inorganic materials. Notably, low-dimensional hybrid including two-dimensional (2D) layers and one-dimensional (1D) chains are recognized for superior stability moisture resistance, making them highly appealing practical applications. Particularly, DMAPbI3 has other interesting behaviors...
We have prepared two new lead halides with the novel general formula of DMA7Pb4X15 (DMA = [(CH3)2NH2]+ and X Cl- or Br-) by using an easy route under mild conditions at room temperature. These compounds exhibit unprecedented crystal structure, are formed layers distorted [PbX6] octahedra, which share corners faces, contain intercalated DMA cations. Very interestingly, they display dielectric transitions, related to a partial order-disorder process cations between 160 260 K. Additionally,...
Abstract Accurate and fast assessment of the intrinsic instability mixed composition hybrid halide perovskite material is vital importance for development solar cells. A longer lifetime close to current silicon‐based technology a mandatory property cells reach commercial applications. The conventional method evaluate operational stability performance relies on tracking maximum power efficiency devices. However, this testing procedure requires long measurement time, which an inefficient...
We studied the X-ray stability of five different clean perovskite single crystal surfaces (MAPbI 3 , MAPbBr MAPbCl FAPbBr CsPbBr ) via photoelectron spectroscopy and observed degradation paths depending on exact composition.
A heterojunction is the key junction for charge extraction in many thin film solar cell technologies. However, structure and band alignment of operating device are often difficult to predict from calculations and, due complexity narrow thickness interface, measure directly. In this study, we demonstrate a technique direct measurement interfacial electric field variations fully functional lead halide perovskite under conditions using hard X-ray photoelectron spectroscopy (HAXPES). We describe...
In large quantities, water is detrimental to lead halide perovskite solar cells, mainly because of the decomposition layer. contrast, presence small quantities has been observed play a key role in crystallization and performance corresponding devices. However, exact during operation cells still under debate. this paper, impedance spectroscopy used analyze changes produced by environmental humidity electronic properties methylammonium triiodide perovskite. Our results show that absorbed from...
Commercial use of lead halide perovskites requires improved thermal stability and therefore a better understanding their degradation mechanisms. The three clean perovskite single crystal surfaces (MAPbI3, MAPbBr3, FAPbBr3) was investigated using synchrotron-based photoelectron spectroscopy. Central findings are that the has large impact on formamidnium results in formation new organic species at FAPbBr3 surface.
A detailed understanding of the surface and interface properties lead halide perovskites is interest for several applications, in which these materials may be used. To develop this understanding, study clean crystalline surfaces can an important stepping stone. In work, electronic structure two different perovskite single crystal compositions (MAPbI3 Csx FA1-x PbI3 ) are investigated using synchrotron-based soft X-ray photoelectron spectroscopy (PES), molecular dynamics simulations, density...
The innovative [DBA][BF4] thermomaterial exhibits advanced thermal properties for multipurpose active barocaloric refrigeration and passive cold-storage of interest commercial food preservation.
The chemical composition, electronic structure, and stability of quantum dots with iodide bromide ligands are investigated photoelectron spectroscopy compared to reference samples.
The [(CH 3 ) 2 NH ]PbBr perovskite exhibits an unusual thermal expansion, and we propose a novel thermomechanical mechanism that differs from the typical “ wine-rack ”. Also, probed presence of H-bond between DMA cation framework.
At present, there is a huge development in optoelectronic applications using lead halide perovskites. Considering that device performance largely governed by the transport of charges across interfaces and, therefore, interfacial electronic structure, fundamental investigations perovskite are highly necessary. In this study, we use high-resolution soft X-ray photoelectron spectroscopy based on synchrotron radiation to explore energetics for molecular layer TIPS-pentacene and single crystals....
The incorporation of dicyanamide blocks in hybrid perovskites is a good strategy for the easy synthesis M@CNTs.
The polar [NH<sub>4</sub>][Cd(HCOO)<sub>3</sub>] hybrid perovskite displays an unprecedented structural arrangement and electric polarization enhancement under applied pressure.