A5051024996- Nanowire Synthesis and Applications
- Silicon and Solar Cell Technologies
- solar cell performance optimization
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Optical Wireless Communication Technologies
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Ferroelectric and Negative Capacitance Devices
- Advancements in Semiconductor Devices and Circuit Design
- Advancements in Solid Oxide Fuel Cells
- TiO2 Photocatalysis and Solar Cells
- Optical Coatings and Gratings
- Advanced Antenna and Metasurface Technologies
- Advanced Memory and Neural Computing
- Nanoplatforms for cancer theranostics
- Photoreceptor and optogenetics research
- Orbital Angular Momentum in Optics
- Optical and Acousto-Optic Technologies
- Advanced Photocatalysis Techniques
- Electrowetting and Microfluidic Technologies
- Advanced battery technologies research
Northwestern University
2023-2025
Ulsan National Institute of Science and Technology
2016-2023
ARC Centre of Excellence for Transformative Meta-Optical Systems
2022
Australian National University
2022
Korea Foundation for Max Planck POSTECH
2019-2021
Government of the Republic of Korea
2019-2020
Transparent photovoltaics (TPVs), which combine visible transparency and solar energy conversion, are being developed for applications in conventional opaque cells unlikely to be feasible, such as windows of buildings or vehicles. In this paper, we review recent progress TPVs along with strategies that enable the photovoltaics, including thin-film technology, selective light-transmission luminescent concentrator technology. From fundamental research commercialization TPV, three main...
We designed and fabricated a random-size inverted-pyramid-structured polydimethylsiloxane (RSIPS-PDMS) sticker to enhance the light absorption of solar cells thus increase their efficiency. The was laminated onto bare glass crystalline silicon (c-Si) surfaces; consequently, low solar-weighted reflectance values were obtained for these surfaces (6.88 17.2%, respectively). In addition, we found that incident refracted at PDMS-air interface each RSIPS, which redirected power significantly...
We demonstrate here an embedded metal electrode for highly efficient organic–inorganic hybrid nanowire solar cells. The proposed is effective alternative to the conventional bus and finger which leads a localized short circuit at direct Si/metal contact has poor collection efficiency due nonoptimized design. In our design, Ag/SiO2 into Si substrate while being positioned between arrays underneath poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), facilitating suppressed...
We developed a unique nano- and microwire hybrid structure by selectively modifying only the tops of microwires using metal-assisted chemical etching. The proposed nano/micro not minimizes surface recombination but also absorbs 97% incident light under AM 1.5G illumination, demonstrating outstanding absorption compared to that planar (59%) arrays (85%). solar cells with an area 1 cm2 exhibit power conversion efficiencies (Eff) up 17.6% illumination. In particular, show high short-circuit...
This review introduces recent progress in silicon microwire solar cells, including the strategies toward achieving low-cost and high-efficiency cells.
ConspectusFlexible solar cells have been intensively studied in recent years for their applicability on curved or uneven surfaces, which augments versatility toward various applications. Although emerging materials such as organics/polymers, perovskite, amorphous silicon, and copper indium gallium selenide used light absorption flexible cells, the commercialization of these is limited owing to efficiency degradation, usage toxic materials, short lifespan, scarcity. On contrary, crystalline...
Structural optimization of microwire arrays is important for the successful demonstration practical feasibility radial junction crystalline silicon (c-Si) solar cells. In this study, we investigated an optimized design tapered (TMW) to maximize light absorption c-Si cells, while minimizing surface recombination, simultaneously improving open-circuit voltage and short-circuit current density (Jsc). Finite-difference time-domain simulations confirmed that controlling spacing between TMWs at...
All-dielectric nanoarrays have strong electromagnetic resonances with various interesting applications and are tuned by adjusting their geometrical parameters. However, optical properties permanently encoded during fabrication. This study presents robust dynamically tunable all-dielectric nanoresonators for controllable, reversible, reproducible color filtering. Our design uses an array of TiO
Solar-driven reactive oxygen species (ROS) generation is an attractive disinfection technique for cell death and water purification. However, most photocatalysts require high stability in the environment production of ROS with a sufficient amount diffusion length to damage pathogens. Here, system was developed consisting tapered crystalline silicon microwires coated anatase titanium dioxide conformal junction. The effectively absorbed >95% sunlight over 300–1100 nm, resulting effective...
Indium Tin Oxide (ITO)-free carrier-selective contact for crystalline silicon solar cells is developed by the integration of a micro-grid electrode.
Abstract Radial junctions on crystalline silicon (c‐Si) microwire structures considerably reduce the diffusion length of photoinduced minority carriers required for energy generation by decoupling light absorption and carrier separation in orthogonal spatial directions. Hence, radial mitigate need high‐purity materials, thus fabrication cost c‐Si solar cells. In this study, formation dopant‐free from atomic layer deposition (ALD) Al 2 O 3 an n‐c‐Si surface is reported. ALD‐Al generates a p +...
Crystalline silicon nanowires (c-SiNWs) have unique optical characteristics that enable tuning of their spectral response. However, real-world applications c-SiNWs as multispectral photodetectors are still hampered by low selectivity and quantum efficiency (<30%). The primary obstacles include the broad-spectrum light absorption bottom crystalline (c-Si) substrate underneath difficulties in forming appropriate p-n junctions on c-SiNWs. In this study, an blocking layer was applied to block...
Abstract Microwire (MW)‐based radial junction crystalline silicon ( c ‐Si) solar cells have great potential as an emerging energy device with efficiency of over 20%. However, the competitive MW‐based ‐Si in realizing a wafer‐scale is limiting its commercialization. In this study, aim to demonstrate that conventional fabrication techniques can be applied while not only increasing size from lab‐scale but also retaining >20%. Surprisingly, improvement open‐circuit voltage and fill factor...
Exploring a computing paradigm that blends memory and computation functions is essential for artificial synapses. While memristors synapses are widely studied due to their energy-efficient structures, random filament conduction in general makes them less preferred endurability long-term synaptic modulation. Herein, the topotactic phase transition (TPT) brownmillerite-phased (110)-SrCoO
We created a polymer-embedded TiO2 nanodiscs device with robust tunable color filters that preserve veiy sharp spectral bands through spatial variations of the pitch meta array.
We demonstrate dynamic tuning of dielectric optical metasurfaces infiltrated with liquid crystals using external magnetic field. show that our approach does not require pre-alignment and refractive index crystal can be dynamically changed.