A5069426974- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Extraction and Separation Processes
- Conducting polymers and applications
- CO2 Reduction Techniques and Catalysts
- Chalcogenide Semiconductor Thin Films
- Gas Sensing Nanomaterials and Sensors
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Electrocatalysts for Energy Conversion
- 2D Materials and Applications
- Graphene research and applications
- Oxidative Organic Chemistry Reactions
- Photochromic and Fluorescence Chemistry
- Adsorption and biosorption for pollutant removal
- Radical Photochemical Reactions
- Copper-based nanomaterials and applications
City University of Hong Kong
2021-2025
University of Engineering and Technology Lahore
2019-2022
University of Electronic Science and Technology of China
2018-2019
Since the first report of all-inorganic perovskite solar cells (PSCs) in 2014, more than 200 research articles have been published on this topic, reporting enhancement stabilized power conversion efficiency (PCE) up to 18.4%. All-inorganic PSCs become one most astonishing domains field perovskite-based photovoltaics. In Review, significant improvements are analytically reviewed, with some insight into kinetics intrinsic phase, light, and thermal stability perovskites. Theoretical...
Perovskite solar cells (PSCs) have a comparable performance to silicon and other thin-film photovoltaic (PV) technologies, which are near commercialization. PSCs several advantages over established PV technologies such as higher power output, enhanced at low light intensities, mechanical flexibility, allow their integration into applications. Industrial opportunities include specific applications in building-integrated photovoltaics, agrivoltaics, the internet of things. Although it is...
This article presents a compact ultra-wideband (UWB) circular monopole antenna with frequency-selective surface (FSS) for gain enhancement. The proposed has patch cuts at the edges and is excited by microstrip feed. bottom plane truncated further modified two triangular sides one rectangular cut in middle to improve radiation characteristics of UWB antenna. designed on an FR-4 substrate thickness 1.6 mm, relative permittivity 4.3, planner dimensions 30 mm × mm. To antenna’s gain, FSS that...
Abstract Lithium (Li) is an essential element in modern energy production and storage devices. Technology to extract Li from seawater, which contains ~ 230 billion tons of Li, offers a solution the widespread concern regarding quantitative geographical limitations future supplies. To obtain green we propose unassisted photoelectrochemical (PEC) extraction system based on III-V-based triple-junction (3J) photoelectrode Li-ion selective membrane with only sunlight as input. A...
Abstract Solar‐driven carbon dioxide reduction reaction (CO 2 RR) provides an opportunity to produce value‐added chemical feedstocks and fuels. However, achieving efficient stable photoelectrochemical (PEC) CO RR into selective products is challenging owing the difficulties associated with optical electrical configuration of PEC devices electrocatalyst properties. Herein, we construct efficient, concentrated sunlight‐driven setup consisting InGaP/GaAs/Ge triple‐junction cell as a photoanode...
Abstract The manipulation of polarization state electromagnetic waves is great importance in many practical applications. In this paper, the reflection characteristics a thin and dual-band metasurface are examined microwave frequency regime. consists 22 × element array periodic unit cells. geometry cell three layers, including 45° inclined dipole shape metal patch on top, which backed by 1.6 mm thick FR-4 substrate middle, fully reflective metallic mirror at bottom. proposed surface exposed...
This study demonstrates quick and efficient removal of different dyes from wastewater by using MoS2/CuS nanosheet composites (NCs) as adsorbent. The NCs are prepared a facile hydrothermal route, the exhibit high adsorption capacity with 273.23, 432.68, 98.78, 211.18 mg/g for rhodamine B (RhB), methylene blue (MB), methyl orange (MO), 6G (RhB 6G), respectively. is ascribed to its specific surface area (106.27 m2/g) small mesopores (2.299 nm) which provide numerous sites uniform coverage dye...
All-inorganic perovskite solar cells (IPSCs) have gained massive attention due to their less instability against common degradation factors (light, heat, and moisture) than organic-inorganic hybrid counterparts. Inorganic perovskites bear a general formula of CsPbX
The increasing need to control anthropogenic CO2 emissions and conversion fuels features the necessity for innovative solutions, one of which is photoelectrochemical system. This approach, capable yielding gaseous production progressively, facing challenges liquid generation due optical, electrical, catalytic properties. study employs a standalone setup, in InGaP/GaAs/Ge photoanode integrated with tin-modified bismuth oxide cathode convert into formic acid. In unassisted two-electrode...
In this paper, a triple-band polarization converting metasurface for X and K u band applications is investigated. The unit cell consists of an asymmetric circular ring, terminated with T-shaped stub, printed on FR-4 substrate, backed by copper cladding. convertibility the results from proper engineering anisotropy along x - y -axis. has three plasmonic resonances conversion ratio (PCR) almost 100% in lower two frequencies bands 95% higher frequency band. at 8.2 13.6 GHz are due to magnetic...
The desorption of conventional ligands from the surface halide perovskite nanocrystals (NCs) often causes their structural instability and deterioration optoelectronic properties. To address this challenge, we present an approach using a bidentate Lewis base ligand, namely, 1,4-bis(diphenylphosphino)butane (DBPP), for synthesis CsPbBr3 NCs. phosphine group DBPP has strong interaction with PbBr2 precursor, forming highly crystalline intermediate complex during reaction. In presence oleic...
This paper presents a broad-band and broad-angle anisotropic reflective polarization converting metasurface (PCMS) for C- X-band applications, which is composed of square split ring resonators. Such PCMS can be used in wide range applications such as satellite antennas, navigation systems, biomedical devices, to name but few. The performance the presented analyzed theoretically, numerically, experimentally. results at normal oblique incidences demonstrate that achieves linear (LP)...
A wideband polarization converting metasurface (MS) is designed, simulated and measured. The proposed design achieves cross conversion from 10.5 to 16.2 GHz. MS exhibit the property of insensitivity against variation in incidence angle (0°-60°) electromagnetic waves. unit cell imprinted on dielectric substrate supported by a metal ground plane. transform linearly polarized waves their orthogonal state, that is, x/y-polarized vice versa GHz band. To validate results, surface fabricated...
Abstract All‐inorganic perovskite solar cells (PSCs) are most promising in yielding stabilized power conversion efficiencies (PCE) as compared to their hybrid organic–inorganic counterparts. However, all‐inorganic PSCs have suffered from low efficiency due significant charge carrier recombination within active layer (PAL) bulk and at the selective interfaces (CSI). Boosting PCE through remedy both issues seems be only Achilles‐Heal on way commercialization. Here, a synergistic approach of...
In this letter an ultra-wideband cross polarization conversion metasurface (PCM) has been designed and simulation results are presented. The proposed surface is made of H shaped unit cells. pattern on FR4 substrate, backed by a copper sheet. structure works as PCM in the frequency range 6.5-22 GHz. efficient cross-polarization (CPC) for both normally oblique incident electromagnetic (EM) waves with fractional bandwidth 114%. simulated shows that 99% converting wave, under transverse electric...
Metasurfaces (MS) allow the base for manifold number of applications rendering to exotic properties mostly not found in nature. These surfaces are contrived using metallic array or dielectric subwavelength resonators. In this paper, we have constructed an extend split ring resonator (SRR) type unit Microwave frequency range. The SRR is printed on a FR-4 stacked by copper ground. results shows that surface capable polarization conversion three distinct bands, i.e. 7-10 GHz (wideband), 11-12.4...
Summary A dual broadband cross‐polarization‐conversion (CPC) metasurface is designed, simulated, fabricated and results are experimentally verified. The designed patch of unit cell composed a triangular loop connected with two arcs at both ends. made 44 × cells arranged periodically on 1.6‐mm‐thick FR4 dielectric substrate, backed by metallic copper sheet as reflector surface the back side substrate. achieves CPC in bands (7–8.5 GHz) (13–19 GHz), microwave regime. simulation show that...
The direct conversion of solar energy to valuable chemicals by mimicking the photosynthesis natural leaves, known as artificial is promising for utilizing renewable energy. Herein, we demonstrate successful extraction lithium (Li) from brine using a photoelectrochemical (PEC) system, combined with Li-selective membrane process. A Si photoelectrode, three p–n junctions connected in series (3S-Si), was seamlessly embedded into an H-cell two compartments separated Li1+xAlxGe2−x(PO4)3 membrane....