A5001611138- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advanced Semiconductor Detectors and Materials
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- solar cell performance optimization
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Transition Metal Oxide Nanomaterials
- Advanced Photocatalysis Techniques
- Solid-state spectroscopy and crystallography
- Phase-change materials and chalcogenides
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- Electronic and Structural Properties of Oxides
- Crystal Structures and Properties
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Pigment Synthesis and Properties
- Manufacturing Process and Optimization
- Titanium Alloys Microstructure and Properties
- Advanced Thermoelectric Materials and Devices
- Economic Growth and Development
- Thin-Film Transistor Technologies
- Iron-based superconductors research
Tallinn University of Technology
2014-2025
Moldova State University
2008-2018
Postdeposition treatments (PDTs) are common technological approaches to achieve high-efficiency chalcogenide solar cells. For SnS, a promising cell material, most PDT strategies control the SnS properties overwhelmingly based on an annealing in sulfur-containing ambient atmosphere that is described by condensed-state reactions and vapor-phase transport. In this work, systematic study of impact PDTs N2 atmosphere, ampules at temperatures between 400 600 °C, SnCl2 treatment 250–500 °C films...
Deliverability of controllable deposition processes represents the current state-of-the-art strategy for development emerging 1D crystal-structure photovoltaic (PV) materials. For Sb2Se3, a compound with tremendous potential next-generation cost-efficient thin-film PV, reported findings proposed that columnar grain growth protocol is required to promote efficient carrier transport and achieve highly solar cells. It still matter debate, however, whether absorber should follow weak contacted...
Degradation of organic pollutants such as methylene blue (MB) from water resources is currently particular interest. Employment a heterojunction device with optimized layer properties and proper interface engineering can enhance the photocatalytic performance by taking advantage efficient charge separation. In this work, we develop an system for MB degradation based on ZnO nanorod (ZnONR)/NiO core-shell heterostructure chemical electronic structure achieving record efficiency ∼70 %. ZnONR...
• Seed layer deployment clearly improved performance of TiO 2 /Sb Se 3 solar cells. Pole figures revealed seed enhanced texture Sb along [001] direction. Temperature-dependent admittance spectroscopy detected deep defect at 0.39 eV. Capacitance-voltage profiles show the density could be as high 10 17 cm −3 . The a superstrate cell, fabricated by close-spaced sublimation technique (CSS), was after layer. caused columnar film growth with coefficient analysis (TC) showing increased presence...
A cost-effective dopant-free fluorene-based enamine as a hole transport material for semi-transparent Sb 2 S 3 solar cells is successfully demonstrated.
Fluorene-based hole transport materials (HTMs) with terminating thiophene units are explored, for the first time, antimony sulfide (Sb2S3) solar cells. These HTMs possess largely simplified synthesis processes and high yields compared to conventional expensive conductors making them reasonably economical. The unit-linked have been successfully demonstrated in ultrasonic spray-deposited Sb2S3 cells resulting efficiencies range of 4.7-4.9% an average visible transmittance (AVT) 30-33% (400-800...
Thin 7-9 μm CdTe films have been deposited on soda lime glass by close-spaced sublimation (CSS). By controlling the CSS temperature-time profile of source and substrate pinhole-free with a good adhesion roughened were prepared. The classical solution-based CdCl2 was applied to enhance film crystallinity optoelectronic properties layers. layers characterized X-ray diffraction, Raman Photoluminescence spectroscopy, scanning microscopy (SEM), energy dispersive microanalysis Van der Paw method....
Antimony trisulfide (Sb2S3) is a promising photovoltaic absorber, which has so far been fabricated mainly by chemical deposition methods. Despite its aptness for congruent sublimation, less research efforts have made on low-temperature Sb2S3 processing physical In this regard, recent studies show large variation in the temperature of films, overall brings into question need higher substrate temperatures (>350 °C). Furthermore, in-depth analysis defect structure employing...
NiO, a wide band gap hole-transporting material (HTM), is gaining attention in photovoltaics due to its optical transparency, chemical stability, and favourable alignment with absorber. This study uses NiOx nanoparticle-based HTM semi-transparent Sb2S3 solar cells via simple precipitation method. We optimised layer by varying precursor solution concentration studied impact on structural properties, composition of nanoparticles subsequent effect the performance cell. nanoparticles, deposited...
The emergence of new PV applications in society requires the design materials and devices based on green earth-abundant elements, with a different set properties wider applicability. In this perspective, Bi2S3 semiconductor material have gained attention as defect-tolerant, non-toxic, highly stable for thin film technologies. Related to non-toxic nature, so far it has been very popular synthesize by chemical solution routes, while little research efforts dedicated absorber deposition...
Chemical bath deposited CdS:Cl thin films on glass substrates were annealed in H2, N2 and air at 250 oC 400 oC, then characterized by XRD, Van der Paw, Raman, photoluminescence transmittance - reflectance spectroscopy. Different properties of CdS film are found depending the neutral, reducing or oxidizing annealing gas. Strong activity chlorine as a flux dopant agent is observed air- films. This expressed strongest intensity 2.24 eV peak. Oxygen containing phases CdSO3 CdO shown XRD patterns...
The rapidly expanding demand for photovoltaics (PVs) requires stable, quick, and easy to manufacture solar cells based on socioeconomically ecologically viable earth-abundant resources. Sb2S3 has been a potential candidate PVs the efficiency of planar thin-film witnessed reasonable rise from 5.77% in 2014 8% 2022. Herein, aim is bring new insight into cell research by investigating how bulk surface properties absorber current-voltage deep-level defect characteristics these films are affected...
Novel dopant-free dimers comprising methoxydiphenylamine substituted fluorene derivatives as hole transport materials (HTMs) in Sb 2 S 3 absorber solar cells.
A two-step post-deposition treatment approach enables organic residue control in TiO 2 and improves the efficiency of a Sb Se 3 /TiO thin film solar cell.
Abstract Zinc oxy-selenide Zn(O,Se) is a novel material, that can replace the toxic CdS buffer layer in thin film solar cells and other optoelectronic devices. In this paper systematic study of structural, optical electrical properties layers, grown by pulsed laser deposition under 50 mTorr nitrogen background pressure, over wide range substrate temperature, from RT to 600 °C, reported. XRD, Raman, HR-SEM, XPS, UV-Vis techniques Hall effect measurements have been used investigate layers. XRD...
For the efficient photocatalytic oxidation of organic pollutants at surfaces semiconductors, photogenerated holes shall be separated toward surface and transferred to reactive sites, whereas transfer electrons minimized. In this Research Article, identification suitable synthesis control charge separation combined with an in-depth understanding kinetics trapping passivation mechanisms related can provide tremendous opportunities for boosting performance. work, a comprehensive transient...
Antimony selenide (Sb 2 Se 3 ) is one of the emerging photovoltaic absorber materials possessing abundance and non-toxicity as main attributes. Following CdTe technology, CdS a widely used partner layer for Sb solar cells. Related to CdS/Sb device configuration, number studies reported findings challenges regarding intermixing phenomenon at interface suitability various annealing (and related interface) still, significant room remains in developing strategies optimization understanding...
Zinc oxyselenide—Zn(O,Se)—could become a novel buffer layer in solar cells and functional different optoelectronic devices. In this study, we systematically investigated the influence of deposition temperature ranging from room (RT) to 650 °C on structural properties Zn(O,Se) layers grown photovoltaic (PV) glass substrates by one-step pulsed laser high vacuum. All were characterized using energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), diffractometry (XRD),...
Antimony sulfide (Sb2S3) with bandgap of ca. 1.7 eV is a promising absorber material for indoor and semi-transparent photovoltaic devices. However, the high cost commonly used hole transport materials (HTMs) may impede advancement this technology. In study, dopant-free fluorene-based enamines different aliphatic chain length synthesized by simple chemical method are first time as HTMs in Sb2S3 solar cell. The study investigates impact HTM type layer thickness on performance cells. cells...