A5010647193- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Optical properties and cooling technologies in crystalline materials
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
- Crystal Structures and Properties
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Conducting polymers and applications
- Laser-Matter Interactions and Applications
- Organic Electronics and Photovoltaics
- Glass properties and applications
- Chalcogenide Semiconductor Thin Films
- Photonic and Optical Devices
- Laser-Ablation Synthesis of Nanoparticles
- Organic and Molecular Conductors Research
- Nonlinear Optical Materials Studies
- Laser-induced spectroscopy and plasma
- Ga2O3 and related materials
- Advanced Thermoelectric Materials and Devices
- Luminescence and Fluorescent Materials
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
Tampere University
2019-2024
ITMO University
2017-2020
Phenothiazine (PTZ)-based materials have recently received considerable interest owing to their intriguing optoelectronic properties, low-cost, versatility of functionalization, and commercial availability.
Double perovskites are a promising family of lead-free materials that not only replace lead but also enable new optoelectronic applications beyond photovoltaics. Recently, titanium (Ti)-based vacancy-ordered double perovskite, Cs2TiBr6, has been reported as an example truly sustainable and earth-abundant perovskite with controversial results in terms photoluminescence environmental stability. Our work looks at this material from perspective, i.e., the nanoscale. We demonstrate first...
Abstract Lead‐free perovskite‐inspired materials (PIMs) are gaining attention in optoelectronics due to their low toxicity and inherent air stability. Their wide bandgaps (≈2 eV) make them ideal for indoor light harvesting. However, the investigation of PIMs photovoltaics (IPVs) is still its infancy. Herein, IPV potential a quaternary PIM, Cu 2 AgBiI 6 (CABI), demonstrated upon controlling film crystallization dynamics via additive engineering. The addition 1.5 vol% hydroiodic acid (HI)...
High uniformity of hydrophobic F4-TCNQ doping in the spiro-OMeTAD layer hinders dopant migration towards anode as well aggregation, leading to a T 80 shelf-lifetime >1 year.
Abstract Antimony‐based perovskite‐inspired materials (PIMs) are solution‐processable halide absorbers with interesting optoelectronic properties, low toxicity, and good intrinsic stability. Their bandgaps around 2 eV make them particularly suited for indoor photovoltaics (IPVs). Yet, so far only the fully inorganic Cs 3 Sb Cl x I 9− composition has been employed as a light‐harvesting layer in IPVs. Herein, first triple‐cation Sb‐based PIM (CsMAFA‐Sb) which A‐site of A X 9 structure consists...
Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report first colloidal synthesis lead-free Cs4CuIn2Cl12 layered double NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. Although is typically...
Cesium manganese chloride (CsMnCl3) nanocrystals (NCs) have recently been recognized as potential lead-free perovskite candidates for red emission. To ascertain how the luminescence properties depend on NC structures formed under different synthesis conditions, we synthesized CsMnCl3 NCs in two polymorphic structures, namely, cubic (c-CsMnCl3) and rhombohedral (r-CsMnCl3), by tuning reaction temperature of a hot injection route. c-CsMnCl3 are found to be nonemissive, whereas r-CsMnCl3...
Lead halide perovskite nanocrystals (NCs) are particularly suitable for light-emitting and photocatalysis applications, where their potential can be maximized by controlling the surface composition of organic shell. In this study, preparation CsPbClxBr3–x NCs at room temperature in toluene is described. Three differently structured surfactants utilized synthesis, each with a specific function, namely, solubilization lead precursor (n-Hept4NBr), passivation modification...
Nanostructured luminescent materials based on perovskite nanocrystals (p-NCs) are attractive since their optical properties can be tuned in a wide spectral range with high luminescence quantum yields and lifetimes, however, they lack stability. In this work, the of highly colloidal p-NCs (CsPbX3, where X = Cl/Br, Br, I) embedded porous opal matrices presented. It is shown that photoluminescence into possess increased longtime stability its kinetic parameters under ambient conditions. LEDs...
Cesium lead iodide (CsPbI 3 ) perovskite nanocrystals (NCs) synthesized at 150 °C show a significantly enhanced phase stability from the red-emitting (black) to non-emitting (yellow) phase.
In recent years, colloidal lead halide perovskite (LHP) nanocrystals (NCs) have exhibited such intriguing light absorption properties to be contemplated as promising candidates for photocatalytic conversions. However, effective photocatalysis, the harvesting system needs stable under reaction conditions propaedeutic a specific transformation. Unlike photoinduced oxidative pathways, photoreductions with LHP NCs are challenging due their scarce compatibility common hole scavengers like amines...
Lead-free layered double perovskite nanocrystals (NCs), i.e., Cs
Phase-pure and highly crystalline AgBiI 4 NCs are synthesized by hot-injection synthesis route. The iodine-rich surface of the enable their impressive long-term environmental thermal stabilities. This study shines light on surface-electronic structure relationship for NCs.
In this work, Si and SiO2, nanoparticles (NPs) was prepared by pulsed laser ablation (PLA) in distilled water. The radiation of a ytterbium fiber (repetition rate f = 50 kHz, wavelength λ 1064 nm pulse duration τ 8 ns 100 ns) at different intensities utilized to ablate the target (99.999%, cubic, 7×7 mm2) under liquid layer synthesize fragment silicon colloidal NPs. Studies morphology size distribution silica NPs were conducted using Transmission Electron Microscopy (TEM). crystalline...
Indoor Photovoltaics In article number 2203768, Paola Vivo and co-workers propose the use of low-toxicity copper-silver-bismuth iodide (Cu2AgBiI6) light-harvester for indoor photovoltaics (IPVs). When treating Cu2AgBiI6 with hydroiodic acid, film morphology is enhanced, leading to IPVs a power conversion efficiency up 4.7%.
Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report first colloidal synthesis lead-free Cs4CuIn2Cl12 layered double NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. While is typically detrimental...
We characterize the generation of square waves from a figure-eight laser that incorporates an on-chip nonlinear waveguide. By varying gain parameters, we show multiple dynamical regimes operation, hysteretic behavior, and bistability CW operation leading to wave pulses.
Polycrystalline zinc sulfide (ZnS) samples doped by Cr <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2+</sup> ions using hot isostatic pressing (at 100 MPa / 250° C) were prepared. Their structure and spectroscopic properties studied. Absorption saturation of :ZnS is demonstrated at 1.54 μm for ns-long pulses yielding a intensity as low 0.15 J/cm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
A saturable absorber for Er lasers - transparent glass-ceramics with nanosized (6 nm) Co <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2+</sup> , Ga <sub xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -doped ZnO crystals is developed. It exhibits a broad xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> ( F) → 4T1(4F) absorption band of ions in tetrahedral sites. At ~1.54 μm, the...
All-inorganic perovskite nanocrystals with chemical formula CsPbX3 (X = Cl, Br, and I) attract much scientific attention since they possess unique optical properties, such as high extinction coefficients values of emission quantum yield, together ease their synthesis tunability in the composition.However, these nanomaterials are still far from large-scale applications lack stability.Here, it was shown that use a nanoporous glass matrix allowed obtaining samples blue, green, red possessing...