A5007658639- Perovskite Materials and Applications
- Conducting polymers and applications
- Metamaterials and Metasurfaces Applications
- Optical Coatings and Gratings
- Advanced Antenna and Metasurface Technologies
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Microwave Engineering and Waveguides
- Photonic and Optical Devices
- Antenna Design and Analysis
- Solid-state spectroscopy and crystallography
- Optical Network Technologies
- Electromagnetic Scattering and Analysis
- Advanced Photonic Communication Systems
- Thermal Expansion and Ionic Conductivity
- Ferroelectric and Piezoelectric Materials
- Thin-Film Transistor Technologies
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
King Abdullah University of Science and Technology
2023-2025
TED University
2019-2021
Korea Advanced Institute of Science and Technology
2021
Abstract Thermally evaporated C 60 is a near-ubiquitous electron transport layer in state-of-the-art p–i–n perovskite-based solar cells. As perovskite photovoltaic technologies are moving toward industrialization, batch-to-batch reproducibility of device performances becomes crucial. Here, we show that commercial as-received (99.75% pure) source materials may coalesce during repeated thermal evaporation processes, jeopardizing such reproducibility. We find the coalescence due to oxygen...
To achieve the full potential of monolithic perovskite/silicon tandem solar cells, crystal defects and film inhomogeneities in perovskite top cell must be minimized. We discuss use methylenediammonium dichloride as an additive to precursor solution, resulting incorporation situ–formed tetrahydrotriazinium (THTZ-H + ) into lattice upon crystallization. The cyclic nature THTZ-H cation enables a strong interaction with lead octahedra through formation hydrogen bonds iodide multiple directions....
Abstract In this study, we present the numerical design and experimental demonstration of an all-dielectric low refractive index polarization-insensitive multilevel diffractive lens (MDL) at microwave frequencies. The proposed MDL structure is composed concentric rings (zones) having different widths heights. Here, heights each dielectric are optimized by using differential evolution (DE) algorithm to obtain desired focusing performance. DE method incorporated with three-dimensional...
In this study, we propose the metaheuristic design of a polarization-insensitive diffractive lens. The designed lens structure consists concentric dielectric rings with optimally modulated widths and heights. Here, evolutionary optimization approach is conducted to find optimum values rings' heights obtain subwavelength focusing effect incident light. Three-dimensional finite-difference time-domain (3D FDTD) method incorporated algorithm evaluate ability instantly structures throughout...
Controlling crystal growth alignment in low-dimensional perovskites (LDPs) for solar cells has been a persistent challenge, especially low-n LDPs (n < 3, n is the number of octahedral sheets) with wide band gaps (>1.7 eV) impeding charge flow. Here we overcome such transport limits by inducing vertical through addition chlorine to precursor solution. In contrast 3D halide (APbX3), find that Cl substitutes I equatorial position unit cell, strain perovskite octahedra, and critical initiating...
Recently, multilevel diffractive lenses (MDLs) have attracted considerable attention, mainly due to their superior wave-focusing performance; however, efforts reduce chromatic aberration are still ongoing. Here, we present a numerical design and experimentally demonstrate high-numerical aperture ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"> <mml:mrow> <mml:mo form="prefix">∼</mml:mo> <mml:mn>0.99</mml:mn> </mml:mrow> </mml:math> ), diffraction-limited...
The computational inverse design has paved the way for of highly efficient, compact, and novel nanophotonic structures beyond human intuition trial-and-error approaches. Apparently, with power, exploration implementation multi-objective, complex, functional devices become feasible. Herein, we used a recently emerged framework to demonstrate 1 × 2 polarization-insensitive wavelength division multiplexer (PIWDM) made low-refractive-index material an index 1.55. inversely designed PIWDM...
Abstract Wide bandgap (WB) perovskites are of interest for envisioned applications in coloured and semi-transparent solar cells. For this, phase pure low dimensional (LDP) promise as they pair a tuneable wide with stability. However, so far, the power conversion efficiency (PCE) LDP cells barely touched few percentages, mainly due to inefficient charge transport being inorganic layer spaced by organic sheets. To overcome such limit is essential control growth crystalline backbone, which...
In this manuscript, we demonstrate the design and experimental proof of an optical cloaking structure which multi-directionally conceals a perfectly electric conductor (PEC) object from incident plane wave. The dielectric modulation around highly reflective scattering PEC is determined by optimization process for multi-directional purposes.
Abstract The computational inverse design has paved the way for of highly efficient, compact, and novel nanophotonic structures beyond human intuition trial-and-error approaches. Consequently, with this new power, exploration implementation multi-objective, complex, functional devices become feasible. Herein, we used a recently emerged framework to demonstrate 1 * 2 polarization-insensitive wavelength division multiplexer (PIWDM) made low-refractive-index material an index 1.55. designed...
Recently, the multilevel diffractive lenses (MDLs) have attracted considerable attention mainly due to their superior wave focusing performance; however, efforts correct chromatic aberration are still in progress. Here, we demonstrate numerical design and experimental demonstration of high-numerical aperture (NA) (${\sim}0.99$), diffraction-limited achromatic lens (AMDL) operating microwave range $10 GHz$ - $14 GHz$. A multi-objective differential evolution (MO-DE) algorithm is incorporated...