A5075791249- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Semiconductor Detectors and Materials
- Semiconductor materials and interfaces
- Semiconductor Quantum Structures and Devices
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Diamond and Carbon-based Materials Research
- Graphene research and applications
- Advanced Thermoelectric Materials and Devices
- 2D Materials and Applications
- Perovskite Materials and Applications
- Tactile and Sensory Interactions
- Carbon Nanotubes in Composites
- Satellite Communication Systems
- Silicone and Siloxane Chemistry
- Electron and X-Ray Spectroscopy Techniques
- MXene and MAX Phase Materials
- Advanced Materials and Mechanics
- Phase-change materials and chalcogenides
- Nanowire Synthesis and Applications
- Bone Metabolism and Diseases
- Crystal Structures and Properties
V.E. Lashkaryov Institute of Semiconductor Physics
2016-2025
Wuyi University
2019-2024
Wuyi University
2024
National Academy of Sciences of Ukraine
2013-2023
Shenzhen University
2017-2020
Abstract The Raman spectra of surface regions bulk Cu 2 ZnSnS 4 (CZTS) samples with different and Zn cation content were obtained the differences in are attributed to statistical disorder effects sublattice. This sublattices may initiate a change crystal symmetry from kesterite‐type $({I\bar 4})$ 42m})$ space group. investigated CZTS crystals grown at high temperature characterised by co‐existence composition ratio Cu/(Zn + Sn) which results kesterite disordered phases. presence phase...
Abstract Cough is a common symptom of various respiratory diseases. However, recognizing subject's cough using acoustic imaging can be challenging due to the complexity coughing and vulnerability acquisition external interference. This research aims address these issues by utilizing flexible piezoelectric ionic liquid‐doped poly(L‐lactic acid) (PLLA) sensor gather pressure signals from human surface. 1‐butyl‐3‐methylimidazolium bis (trifluoromethylsulfonyl)imide ([BMIm]TFSI) liquid (IL)...
Cu-Sn-S (CTS) thin films were deposited onto bare and molybdenum (Mo) coated glass substrates by means of the spray pyrolysis technique under different conditions. The CTS obtained are shown, Raman spectroscopy, to consist two main phases: Cu2SnS3 Cu3SnS4 as well secondary phase Cu2-xS. electrical conductivity spray-deposited p-type investigation is determined shallow acceptor levels: Ev+0.07 eV at T<334 K Ev+0.1 T>334 K. material was established be a direct-band semiconductor with bandgap...
Poly-l-lactic acid (PLLA) is a synthetic, biocompatible, biodegradable polymer with good piezoelectric properties. The prepared PLLA films were annealed in the oven at 140 °C for 0 h, 3 12 and 24 respectively. influences of temperature treatment time on optoelectronic properties sensors based them investigated. morphology crystal structure obtained under various post-processing conditions examined by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, ATR-FTIR spectroscopy....
Cu2ZnSn(S,Se)4 (CZT(S,Se)) thin films exhibit the characteristics necessary to be effective absorbers in solar cells. In this report, room temperature experimental Raman scattering spectra, recorded at different excitation wavelengths, are systematically analyzed theoretically using results of DFT harmonic frequencies calculations Γ-point for various modifications kesterite (KS), stannite (ST), and pre-mixed Cu-Au (PMCA) crystal structures. The specific anharmonism‐induced features spectra...
Abstract Piezoelectric energy harvester (PEH) holds great potential for flexible electronics and wearable devices. However, the power conversion efficiency of PEH (fPEH) has often been a limiting factor, especially under variable excitation. Herein, we propose practical solution: poly(L-lactic acid)-based fPEH with 3D-printed micro-zigzag structures. This design not only broadens operational bandwidth enhances low-frequency response but also offers tangible improvement in fPEH. The structure...
The dielectric function of orthorhombic ${{\mathrm{Cu}}_{2}\mathrm{CdGeS}}_{4}$ and ${{\mathrm{Cu}}_{2}\mathrm{CdSiS}}_{4}$ single crystals (space group $Pmn{2}_{1}$) is measured experimentally in the spectral range 0.7--5.2 eV, results are interpreted via comparison with ab initio calculations. Polarized Raman-scattering measurements both semiconductors reported. All observed vibrational modes assigned to specific lattice eigenmodes wurtz-stannite structure. Good agreement between...
In recent years, two‐dimensional (2D) materials with unique mechanical, optical, and electrical properties have attracted extensive attention. terms of mechanical properties, 2D molybdenum disulfide (MoS 2 ) can perform larger strains than traditional semiconductor materials. this contribution, the chemical vapor deposition technique to grow MoS films on a Si wafer transfer them onto flexible substrate is used. The controlled deformation samples realized by encapsulating acrylate film via...
This article uses innovative UV-curable acrylate elastomer with AgNWs to develop flexible strain sensors for wrist movement monitoring.
Nano-crystalline and amorphous films of graphitized carbon were deposited by electron-beam evaporation bulk graphite. Structural properties the size graphite nanoclusters (L ≈ 1.2-5 nm) in determined from analysis their Raman spectra. Electrical nano-crystalline reference sample graphitic measured means Hall effect technique within temperature range 290 to 420 K. The electrical conductivity σ mobility μH all samples exhibited exponential dependences, indicating on non-metallic behavior. thin...
Abstract The application of biodegradable films based on the piezoelectric effect poly‐ l ‐lactic acid (PLLA) in sensors, transducers, actuators, and so has gradually become one emerging research focuses. In this work, a flexible PLLA sensor with UV‐curable acrylate film packaging is proposed for human behavior recognition. acrylic different proportions have mechanical surface properties, showing good flexibility, ductility, skin adhesion. morphology crystal structure UV curable substrate...
In this work, we propose a method to improve electro-optical and structural parameters of light-absorbing kesterite materials. It relies on the application weak power hydrogen plasma discharges using electromagnetic field radio frequency range, which improves homogeneity samples. The allows reduce strain light absorbers is suitable for designing solar cells based multilayered thin film structures. Structural characteristics tetragonal Cu2ZnSn(S, Se)4 structures their optical properties were...
Metamorphic InAs/In0.15Ga0.85As and InAs/In0.31Ga0.69As quantum dot (QD) arrays are known to be photosensitive in the telecommunication ranges at 1.3 1.55 μm, respectively; however, for photonic applications of these nanostructures, effect levels related defects still needs in-depth investigation. We have focused on influence electron traps photocurrent (PC) plane QD array, studying by PC deep level thermally stimulated current spectroscopy together with HRTEM theoretical modeling. In...