A5028186317- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advancements in Battery Materials
- Solid-state spectroscopy and crystallography
- Force Microscopy Techniques and Applications
- Organic Electronics and Photovoltaics
- Advanced Battery Materials and Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Battery Technologies Research
- Analytical Chemistry and Sensors
- Diatoms and Algae Research
- Semiconductor materials and devices
- Organic Light-Emitting Diodes Research
- Supercapacitor Materials and Fabrication
- Optical properties and cooling technologies in crystalline materials
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and interfaces
- Electrochemical Analysis and Applications
- Nanowire Synthesis and Applications
- Graphene research and applications
- Transition Metal Oxide Nanomaterials
- Porphyrin and Phthalocyanine Chemistry
Skolkovo Institute of Science and Technology
2016-2025
University of Aveiro
2014-2017
Lomonosov Moscow State University
2013
We report here all inorganic CsPbI3 planar junction perovskite solar cells fabricated by thermal coevaporation of CsI and PbI2 precursors. The best devices delivered power conversion efficiency (PCE) 9.3 to 10.5%, thus coming close the reference MAPbI3-based (PCE ≈ 12%). These results emphasize that lead halide perovskites can successfully compete in terms photovoltaic performance with most widely used hybrid materials such as MAPbI3.
We report a careful and systematic study of thermal photochemical degradation series complex haloplumbates APbX3 (X = I, Br) with hybrid organic (A+ CH3NH3) inorganic Cs+) cations under anoxic conditions (i.e., without exposure to oxygen moisture by testing in an inert glovebox environment). show that the most common materials (e.g., MAPbI3) are intrinsically unstable respect heat- light-induced stress and, therefore, can hardly sustain real solar cell operation conditions. On contrary,...
Abstract Electromechanical response of materials is a key property for various applications ranging from actuators to sophisticated nanoelectromechanical systems. Here electromechanical properties the single-layer graphene transferred onto SiO 2 calibration grating substrates studied via piezoresponse force microscopy and confocal Raman spectroscopy. The correlation mechanical strains in layer with substrate morphology established mapping. Apparent vertical supported by underlying structure...
We report the first systematic assessment of intrinsic photothermal stability a large panel complex lead halides APbX3 incorporating different univalent cations (A = CH3NH3+, [NH2CHNH2]+, Cs+) and halogen anions (X Br, I) using series analytical techniques such as UV-vis X-ray photoelectron spectroscopy, diffraction, EDX analysis, atomic force scanning electron microscopy, ESR mass spectrometry. show that heat stress light soaking induce severe degradation perovskite films even in absence...
Abstract Tunability of optoelectronic properties lead halide perovskites achieved through mixing can potentially enable their multiple applications, for example, in tandem solar cells and light‐emitting diodes. However, mixed are unstable under illumination due to segregation Br‐rich I‐rich phases, which negatively affects the performance operational stability devices. Research efforts over past years provided a substantial understanding factors influencing light‐induced phase segregation....
The use of engineered cardiac tissue for high-throughput drug screening/toxicology assessment remains largely unexplored. Here we propose a scaffold that mimics aspects extracellular matrix while preserving the contractility cardiomyocytes. is based on poly(caprolactone) (PCL) nanofilm with magnetic properties (MNF, standing nanofilm) coated layer piezoelectric (PIEZO) microfibers poly(vinylidene fluoride–trifluoroethylene) (MNF+PIEZO). creates flexible support cell contraction and aligned...
Abstract Li-ion battery performance and life cycle strongly depend on a passivation layer called solid-electrolyte interphase (SEI). Its structure composition are studied in great details, while its formation process remains elusive due to difficulty of situ measurements electrodes. Here we provide facile methodology for atomic force microscopy (AFM) SEI cross-sectioned composite electrodes allowing direct observations various types carbonaceous negative electrode materials batteries. Using...
Here we explore the effect of partial substitution univalent methylammonium cations (MA) with hydrazinium ions (HA) on stability, morphology and photovoltaic performance hybrid MA<sub>(1−x)</sub>HA<sub>x</sub>SnI<sub>3</sub> systems.
Structurally different complex bismuth iodides with 1D anionic frameworks were designed and explored as semiconductor materials for photovoltaic devices.
For over a decade, Li-rich layered metal oxides have been intensively investigated as promising positive electrode materials for Li-ion batteries. Despite substantial progress in understanding of their electrochemical properties and (de)intercalation mechanisms, certain aspects chemical structural transformations still remain unclear. In this work, we the so-called cycling-driven activation, which manifests itself gradual increase reversible capacity upon cycling when Li-to-transition atomic...
Transport properties of Li+ mobile ions in fresh and aged LiMn2O4 battery cathodes were studied at the nanoscale via electrochemical strain microscopy (ESM), time spectroscopy, voltage spectroscopy mapping. Both Vegard plausible non-Vegard contributions to ESM signal identified hysteresis loops obtained on samples. In cathodes, contribution dominates signal, while samples different shape indicates an additional contribution. Non-uniform spatial distribution loop opening particles stronger...
Here, we present a systematic study of the thermal and photochemical degradation pathways for series complex tin-based halides ASnX3 (X = I, Br) with organic (CH3NH3+, H2NCHNH2+) inorganic (Cs+) univalent A-site cations. Thin films perovskites were exposed to continuous light soaking and/or annealing in dark under an inert atmosphere, which simulate pragmatic anoxic operation conditions solar cells absorber layer isolated from (re)action oxygen moisture by appropriate encapsulation. Using...
We investigated the impact of a series hole transport layer (HTL) materials such as Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), NiOx, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine (PTAA), and polytriarylamine (PTA) on photostability thin films solar cells based MAPbI3, Cs0.15FA0.85PbI3, Cs0.1MA0.15FA0.75PbI3, Cs0.1MA0.15FA0.75Pb(Br0.15I0.85)3, Cs0.15FA0.85Pb(Br0.15I0.85)3 complex lead halides. Mixed halide perovskites showed reduced in comparison with similar...
We report on the impact of γ radiation (0–500 Gy) triple-cation Cs0.15MA0.10FA0.75Pb(Br0.17I0.83)3 perovskite solar cells. A set experiments was designed to reveal individual contributions hole-collecting bottom electrode, absorber, and electron transport layer (ETL) overall cell degradation under exposure. show that glass/ITO/PEDOT:PSS electrode withstands a 500 Gy dose without any losses in performance. In contrast, absorber films PC61BM ETL are very sensitive rays, as can be concluded...
Abstract Diatoms are single cell microalgae enclosed in silica exoskeletons (frustules) that provide inspiration for advanced hybrid nanostructure designs mimicking multi-scale porosity to achieve outstanding mechanical and optical properties. Interrogating the structure properties of diatoms down nanometer scale leads breakthrough advances reported here nanomechanical characterization Coscinodiscus oculus-iridis diatom pure frustules, as well air-dried wet cells with organic content. Static...
Modification of PTAA molecular structure significantly improves the power conversion efficiencies dopant-free HTL n–i–p perovskite solar cells.
Herein, we reveal for the first time a comprehensive mechanism of poorly investigated electrochemical decomposition CH3NH3PbI3 using set microscopy techniques (optical, AFM, PL) and ToF-SIMS. We demonstrate that applied electric bias induces oxidation I- to I2, which remains trapped in film form polyiodides, hence, process can be conceivably reversed by reduction. On contrary, reduction organic methylammonium cation produces volatile products, leave thus make degradation irreversible. Our...
Here, phenyl-C61-butyric acid (PCBA) is presented as a generic passivation coating for metal oxide electron transport layers used in planar n–i–p configuration of perovskite solar cells. PCBA shows better adhesion to tin and zinc oxides due strong acid–base interactions compared the conventionally methyl ether (PCBM). Therefore, depositing compact can be achieved much more economical way using 100 times less concentrated precursor solution. In addition, delivers higher power conversion...
Herein, unsubstituted poly‐para‐xylylene (parylene‐N) film as an encapsulation material for MAPbI 3 perovskite solar cells (PSCs) is assessed. Unlike more commonly used parylene‐C, parylene‐N cheaper and does not contain Cl which makes it a promising encapsulant materials. Being deposited by room temperature chemical vapor deposition in vacuum, 2 mm‐thick parylene stabilizes ‐based inhibits the degradation even under stress test conditions (85 °C air). Moreover, cells, encapsulated with...
Overstoichiometric alloy-type material Cs<sub>1.2</sub>PbI<sub>2</sub>Br<sub>1.2</sub> delivered superior optoelectronic, morphological and photovoltaic characteristics in combination with the enhanced stability thus outperforming conventional CsPbI<sub>2</sub>Br perovskite.
Hard carbon (HC) is considered as a negative electrode material for potassium-ion batteries, but it suffers from significant irreversible capacity loss at the first discharge cycle. Here, we investigated possible reasons of this with combination in situ AFM and various ex TEM techniques (high resolution high angle annular dark field scanning imaging, STEM-EELS STEM-EDX spectroscopic mapping) targeting electrode/electrolyte interphase formation process carbonate-based electrolyte without...
Over the last decade, perovskite solar cells (PSCs) have demonstrated tremendous growth in power conversion efficiencies. Different strategies toward developing new film deposition techniques were of particular help such progress. Considering generally poor operational stability PSCs, understanding influence methods on lead halide films is vital to facilitate further practical application this technology. Herein, we studied impact CH3NH3PbI3 photostability films. In particular, one-step a...