A5049422501- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Semiconductor materials and interfaces
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Photovoltaic System Optimization Techniques
- Quantum Dots Synthesis And Properties
- solar cell performance optimization
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Silicon Nanostructures and Photoluminescence
- Integrated Circuits and Semiconductor Failure Analysis
- Nanowire Synthesis and Applications
- Advancements in Battery Materials
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and devices
- Photovoltaic Systems and Sustainability
- Advanced battery technologies research
- ZnO doping and properties
- Organic Electronics and Photovoltaics
- Electrospun Nanofibers in Biomedical Applications
- Electrocatalysts for Energy Conversion
- Semiconductor Quantum Structures and Devices
- Nanomaterials and Printing Technologies
- GaN-based semiconductor devices and materials
Korea University
2016-2025
Toyota Technological Institute
2006-2022
Seoul Institute
2019-2020
Government of the Republic of Korea
2014-2020
Gangnam Severance Hospital
2018
Yonsei University
2018
Shinsung University
2012
Hyosung Corporation (South Korea)
2010-2011
Korea Innotech (South Korea)
2011
LG (South Korea)
1999-2006
Abstract Although the power conversion efficiency of perovskite solar cells has increased from 3.81% to 22.1% in just 7 years, they still suffer stability issues, as degrade upon exposure moisture, UV light, heat, and bias voltage. We herein examined degradation presence light alone. The were exposed 365 nm for over 1,000 h under inert gas at <0.5 ppm humidity without encapsulation. 1-sun illumination after resulted recovery fill factor efficiency. Furthermore, during consecutive...
Abstract In this study, we employ a combination of various in-situ surface analysis techniques to investigate the thermally induced degradation processes in MAPbI 3 perovskite solar cells (PeSCs) as function temperature under air-free conditions (no moisture and oxygen). Through comprehensive approach that combines grazing-incidence wide-angle X-ray diffraction (GIWAXD) high-resolution photoelectron spectroscopy (HR-XPS) measurements, confirm structure film changes an intermediate phase...
Perovskite solar cells have great potential for high efficiency generation but are subject to the impact of external environmental conditions such as humidity, UV and sun light, temperature, electric fields. The long-term stability perovskite is an important issue their commercialization. Various studies on currently being performed; however, related fields rarely discussed. Here electrical studied. Ion migration confirmed using temperature-dependent dark current decay. Changes in power...
Copper has attracted significant interests as an abundant and low‐cost alternative material for flexible transparent conducting electrodes (FTCEs). However, Cu‐based FTCEs still present unsolved technical issues, such their inferior light transmittance oxidation durability compared to conventional indium tin oxide (ITO) silver metal electrodes. This study reports a novel technique fabricating highly efficient composed of copper ultrathin film sandwiched between zinc oxides, with enhanced...
Tunnel oxide passivated contact (TOPCon) solar cells achieve efficiencies exceeding 26% by incorporating a heavily doped poly‐Si layer with tunnel oxide, recent efforts focusing on enhancing the rear passivation structure. In industrial TOPCon cells, high‐temperature firing process during metal formation degrades quality of poly‐Si/SiO x contacts, necessitating improvements to maintain cell performance. While previous studies examine degradation factors related structure, research mechanisms...
In the photovoltaic (PV) industry, module manufacturers have begun to install bifacial cells into monofacial modules because of their lower production costs relative cells. This is linked mainly a 65.3% reduction in rear aluminum paste consumption and corresponding 0.5 cent/wafer cost for M4 (161.7 × 161.7 mm2) size wafers. Therefore, this study compared performance PV with as reference group test determine potential latter terms energy yield. Fifteen each type were installed solar carport...
Abstract We report on the structural evolution of tunneling oxide passivating contact (TOPCon) for high efficient solar cells upon thermal annealing. The doped hydrogenated amorphous silicon (a-Si:H) into polycrystalline-silicon (poly-Si) by annealing was accompanied with significant changes. Annealing at 600 °C one minute introduced an increase in implied open circuit voltage (V oc ) due to hydrogen motion, but V decreased again five minutes. At temperature above 800 °C, a-Si:H crystallized...
A highly efficient light-scattering layer based on a silica nanoparticle array was fabricated flexible polymer substrate by employing direct vacuum deposition process at room temperature, facilitating power conversion efficiency of 7.42% from organic solar cell.
The development of highly efficient flexible transparent electrodes (FTEs) supported on polymer substrates is great importance to the realization portable and bendable photovoltaic devices. Highly conductive, low-cost Cu has attracted attention as a promising alternative for replacing expensive indium tin oxide (ITO) Ag. However, efficient, Cu-based FTEs are currently unavailable because absence an means attaining atomically thin, completely continuous film that simultaneously exhibits...
Graphene quantum dot (GQD) layers were deposited as an energy-down-shift layer on crystalline-silicon solar cell surfaces by kinetic spraying of GQD suspensions. A supersonic air jet was used to accelerate the GQDs onto surfaces. Here, we report coating results a silicon substrate and GQDs' application in cells, which enhanced power conversion efficiency (PCE). at nozzle scan speeds 40, 30, 20, 10 mm/s evaluated after they fabricate cells; indicate that play important role increasing optical...
The silicon surface texture significantly affects the current density and efficiency of perovskite/silicon tandem solar cells. However, only a few studies have explored fabricating perovskite on textured effect films because limitations solution processes. Here we produce conformal with dry two-step conversion process that incorporates lead oxide sputtering direct contact methyl ammonium iodide. To separately analyze influence each structure films, patterned texture, high-resolution...
In this study, we focused on understanding the roles of a polysilicon (poly-Si) layer in poly-Si/SiO x /c-Si passivating contacts. Passivating contact formation conditions were varied by changing doping method, annealing temperature and time, thickness, concentration. Our observations indicated that are contact, in-diffusion barrier action, field effect, gettering, light absorption. Based observations, iV OC 741 mV was obtained. Finally, to increase J SC with high V OC, etched after...
Abstract Silicon solar cells among different types of energy harvesters have entered the commercial market owing to their high power conversion efficiency and stability. By replacing electrode p ‐type layer by a single carbon nanotubes, device can be further simplified. This greatly augments attractiveness silicon in light raw material shortages payback period, as well lowering fabrication costs. However, nanotube‐based still lack These improved chemical doping, antireflection coating,...
Perovskite-based tandem solar cells are promising candidates for industrial applications. This study demonstrated perovskite/silicon devices based on a conventional Si homojunction device configuration employing tunnel oxide passivating contact to improve the voltage. Moreover, we fabricated it without deposition of recombination layer large area while showing possibility applying industry market. cell exhibited power conversion efficiency 17.3% and high voltage 1783 mV 25 cm2 active area.