A5076608988- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Optical properties and cooling technologies in crystalline materials
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Solid State Laser Technologies
- ZnO doping and properties
- GaN-based semiconductor devices and materials
- Quantum optics and atomic interactions
- Biosensors and Analytical Detection
- Microbial Inactivation Methods
- Organic Electronics and Photovoltaics
- Microwave Dielectric Ceramics Synthesis
- Nanoparticle-Based Drug Delivery
- Nanocluster Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Crystal Structures and Properties
- Organic Light-Emitting Diodes Research
- Analytical Chemistry and Sensors
- Semiconductor Lasers and Optical Devices
- Photodynamic Therapy Research Studies
- Nanoplatforms for cancer theranostics
- Listeria monocytogenes in Food Safety
University of Cyprus
2018-2025
Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine
2025
Nanocrystal superlattices (NC SLs) have long been sought as promising metamaterials, with nanoscale-engineered properties arising from collective and synergistic effects among the constituent building blocks. Lead halide perovskite (LHP) NCs come across outstanding candidates for SL design, they demonstrate light emission, known superfluorescence, in single- multicomponent SLs. Thus far, LHP only assembled single-component SLs or coassembled dielectric NC blocks acting solely spacers between...
Nanocrystal (NC) self-assembly is a versatile platform for materials engineering at the mesoscale. The NC shape anisotropy leads to structures not observed with spherical NCs. This work presents broad structural diversity in multicomponent, long-range ordered superlattices (SLs) comprising highly luminescent cubic CsPbBr3 NCs (and FAPbBr3 NCs) coassembled spherical, truncated cuboid, and disk-shaped building blocks. nanocubes combined Fe3O4 or NaGdF4 spheres cuboid PbS form binary SLs of six...
Solution-processed lasers are cost-effective, compatible with a vast range of photonic resonators, and suited for mass production flexible, lightweight, disposable devices. The emerging class lead halide perovskite nanocrystals (LHP NCs) can serve as highly suitable active medium such lasers, owing to their outstanding optical gain properties the suppressed nonradiative recombination losses stemming from defect-tolerant nature. In this work, CsPbBr3 NCs embedded within polymeric Bragg...
The primary obstacle to the use of lead halide perovskite nanocrystals (NCs) in optoelectronics is inability traditional ligand engineering approaches provide robust surface passivation. structural lability can be mitigated by employing different ligands such as long-chain quaternary ammonium and zwitterionic surfactants. Here, we report a comprehensive study that probes impact passivation routes on optoelectronic properties weakly confined CsPbBr3 NCs. Spectroscopy unravels clear...
Coumarin-6 is used as a model hydrophobic drug to investigate delivery tumors via polymeric micelles. Photophysical characterization, well in vitro and vivo experiments showcase this platform for cancer diagnosis imaging.
Abstract Tin halide perovskite nanocrystals (NCs) are less prone to the environmental issues associated with lead‐based NC analogs, however, they suffer from tin oxidation and structural polymorphism. durability deteriorates further in solid state due greater exposure humidity oxygen, resulting a very limited number of studies on thin films nanostructures. Herein, spectroscopic study 3D CsSnI 3 NCs that coexist 2D Ruddlesden‐Popper nanosheets (NSs) residual amounts is being reported....
Lead halide perovskite nanocrystals (NCs) were recently found to exhibit extraordinary optical amplification properties. The great majority of such studies implemented ultrashort photon pulses in the femtosecond regime initiate stimulated emission process. Yet realization practical lasing applications based on materials is crucially dependent their ability sustain at significantly longer time scales, which major losses associated with spontaneous and nonradiative recombination occur. Herein...
Advances in the technology and processing of flexible optical materials have paved way toward integration semiconductor emitters polymers into functional light emitting fabrics. Lead halide perovskite nanocrystals appear as highly suitable sensitizers for such polymer fiber due to their ease fabrication, versatile solution-processing efficient, tunable, narrow emission across visible spectrum. A beneficial byproduct nanocrystal incorporation matrix is that it provides a facile low-cost...
Lead halide perovskite nanocrystals (NCs) are highly suitable active media for solution-processed lasers in the visible spectrum, owing to wide tunability of their emission from blue red via facile ion-exchange reactions. Their outstanding optical gain properties and suppressed nonradiative recombination losses stem defect-tolerant nature. In this work, we demonstrate flexible waveguides combining transparent, bioplastic, polymer cellulose acetate with green CsPbBr3 or red-emitting...
The slowdown of carrier cooling in lead halide perovskites (LHP) may allow the realization efficient hot solar cells. Much current effort focuses on understanding mechanisms that retard relaxation, while proof-of-principle demonstrations harvesting have started to emerge. Less attention has been placed impact energy and momentum relaxation imparts spontaneous stimulated light-emission process. LHP nanocrystals (NCs) provide an ideal testing ground for such studies as they exhibit bright...
The European Food Safety Authority (EFSA) has approved the use of a 1045 J/L UV-C dose as an adjunct to pasteurization increase shelf life and vitamin D3 content milk. However, there are no verification methods analogous alkaline phosphatase test for pasteurized milk ensure that desired been correctly applied. aim is develop real-time in-line detector based on fluorescence spectroscopy. In this study, 22 different doses (ranging from 0 2000 J/L) were applied assess impact photooxidation...
Abstract Ligand exchange performed during or after the colloidal synthesis of nanocrystals (NCs) provides an efficient way to produce conductive NC solids for optoelectronics. Herein, a post‐synthetic ligand washing process is developed and applied two different combinations ligands perovskite NCs, namely robust green CsPbBr 3 NCs capped by didodecyldimethylammonium bromide near‐infrared FAPbI decorated weakly bound oleic acid ligands. The impact such processes on morphological...
In this work, we demonstrate efficient light down-conversion via FRET in InGaN/GaN multiple quantum well (MQW) nanohole arrays, coated with green-emitting CsPbBr3 and FAPbBr3 nanocrystals (NCs) near-infrared (IR) FAPbI3 NC overlayers for solid-state lighting. Patterning the InGaN MQW into arrays allows a minimum nitride–NC separation while increasing heterointerfacial area, thus improving simultaneously nonradiative radiative transfer efficiencies. Detailed spectroscopic studies of...
Colloidal quantum dots (CQDs) are typically decorated with organic molecules that provide surface passivation and colloidal solubility. An alternate but less studied functionalization approach via inorganic complexes can produce stable CQDs attractive transport optical properties. Further development of such all-inorganic CQD solids is dependent on the deeper understanding energetic dynamic interactions new ligands excitons. Herein, a series four metal chalcogenide (MCC) KzXS4 type were...
Spontaneous and Stimulated Emission Studies of Tin Halide Perovskite NanostructuresGrigorios Itskos a, Andreas Manoli Paris Papagiorgis Kyriacos Georgiou b, Emmanouil Lioudakis Kushagra Gahlot c, Loredana Protesescu Othonos ba Experimental Condensed Matter Physics Laboratory, Department Physics, University Cyprus, Nicosia 1678, Cyprusb Laboratory Ultrafast Science, Cyprusc Zernike Institute for Advanced Materials Groningen Nijenborgh 4, 9747AG, The NetherlandsMaterials Sustainable...