A5081644664- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Parallel Computing and Optimization Techniques
- Embedded Systems Design Techniques
- Copper-based nanomaterials and applications
- Interconnection Networks and Systems
- Catalytic Processes in Materials Science
- Semiconductor Lasers and Optical Devices
- Liquid Crystal Research Advancements
- Distributed and Parallel Computing Systems
- Semiconductor materials and interfaces
- Thin-Film Transistor Technologies
- Visual perception and processing mechanisms
- CCD and CMOS Imaging Sensors
- ZnO doping and properties
- Industrial Gas Emission Control
- Perovskite Materials and Applications
- Advanced Optical Imaging Technologies
- Image and Video Quality Assessment
- Impact of Light on Environment and Health
- Tactile and Sensory Interactions
- Neuroscience and Neural Engineering
- Advanced Sensor and Energy Harvesting Materials
- Advanced Neural Network Applications
- Color Science and Applications
Institute for Advanced Engineering
2016-2024
Daegu Gyeongbuk Institute of Science and Technology
2013-2023
Kyung Hee University
2015-2023
Government of the Republic of Korea
2019
University of California, San Diego
2009-2013
Using an appropriate SeS<sub>2</sub>/Se weight ratio, band gap grading was realized. By increasing the value of<italic>V</italic><sub>OC</sub>through in depletion region, a record<italic>V</italic><sub>OC</sub>deficit of 0.576 V and efficiency 12.3% were obtained.
We fabricated CZTSSe thin films using optimized SLG-Mo/Zn/Cu/Sn (MZCT) as a stacked structure and described the phenomenon of Zn elemental volatilization MZCT structure.
In the era of multi-core, computer vision has emerged as an exciting application area which promises to continue drive demand for both more powerful and energy efficient processors. Although there is still a long way go, matured significantly over last few decades, list applications that are useful end users continues grow. The parallelism inherent in makes them promising workload multi-core many-core While community focused many years on improving accuracy algorithms, major barrier study...
Many recent parallelization tools lower the barrier for parallelizing a program, but overlook one of first questions that programmer needs to answer: which parts program should I spend time ? This paper examines Kremlin, an automatic tool that, given serial version will make recommendations user as what regions (e.g. loops or functions) attack first. Kremlin introduces novel hierarchical critical path analysis and develops new metric estimating potential region: self-parallelism . We further...
Many recent parallelization tools lower the barrier for parallelizing a program, but overlook one of first questions that programmer needs to answer: which parts program should I spend time parallelizing?
Software engineers now face the difficult task of refactoring serial programs for parallel execution on multicore processors. Currently, they are offered little guidance as to how much benefit may come from this task, or close best possible parallelization. This paper presents Kismet, a tool that creates speedup estimates unparallelized programs. Kismet differs previous approaches in it does not require any manual analysis modification program. difference allows quick many programs, avoiding...
Viewing high luminance displays under low light conditions causes unbearable glare. On the other hand, viewing bright reduces visibility. We investigate comfortable display range for several different of ambient illuminance through a psychophysical experiment, which involved 30 subjects. The obtained upper (lower) limits zone were 516 (113), 574 (116), 612 (130), 664 (154), 737 (177), 790 (204), and 836 (246) cd/m2, illuminances 50, 100, 200, 500, 1000, 2000, 5000 lx, respectively.
Abstract Understanding the defect characteristics that occur near space‐charge regions (SCRs) of kesterite (CZTSSe) solar cells is important because recombination loss at CZTSSe/CdS interface considered main cause their low efficiency. CZTSSe surfaces with different elemental compositions were formed without polishing (C00) and for 20 s (C20) 60 (C60). For C60, a specific region SCR was excessively Cu‐rich Zn‐poor compared to C00 C20. Various charged defects where variation large. As deep...
This paper overviews Kremlin, a software profiling tool designed to assist the parallelization of serial programs. Kremlin accepts source code, profiles it, and provides list regions that should be considered in parallelization. Unlike typical profiler, not only work but also parallelism, which is accomplished via novel technique called hierarchical critical path analysis. Our evaluation demonstrates highly effective, resulting parallelized program whose performance sometimes outperforms,...
The Kremlin open-source tool helps programmers by automatically identifying regions in sequential programs that merit parallelization. combines a novel dynamic program analysis, hierarchical critical-path with multicore processor models to evaluate thousands of potential parallelization strategies and estimate their performance outcomes.
This letter proposes a novel active-matrix (AM) micro light-emitting diode (micro-LED) display architecture featuring fingerprint detection. A new pixel circuit comprising four transistors and one capacitor (4T1C) is proposed to compensate for threshold voltages externally. The AM micro-LED does not need any additional light sources sensors because an LED itself can be used photosensors. 4T1C isolate the effects of photocurrents caused by ambient lights large capacitance from detecting...
In this paper, we propose a new physical model to predict the transient responses of an active-matrix liquid crystal display (LCD) in twisted nematic (TN) mode. For behavioral model, three types data are most important: 1) capacitance-voltage; 2) transmittance-voltage characteristics; and 3) time constant parameters a1 a2. We extract them from properties TN LC molecules, such as dielectric anisotropy, birefringence, viscosity, cell gap, elastic constant. describe behavior TN-LCD by using...
We evaluated a ZnS buffer layer prepared using chemical bath deposition (CBD) process for application in cadmium-free Cu(In,Ga)Se2 (CIGS) solar cells. The showed good transmittance (above 90%) the spectral range from 300 to 800 nm and was non-toxic compared with CdS layers normally used CIGS CBD affected by several conditions. rate dependent on ammonia concentration (complexing agent). When either too high or low, decrease observed. In addition, post heat treatments at temperatures had...
The efficiency of thin-film chalcogenide solar cells is dependent on their window layer thickness. However, the application an ultrathin difficult because limited capability deposition process. This paper reports use atomic (ALD) processes for fabrication thin layers Cu(Inx,Ga1-x)Se2 (CIGS) cells, replacing conventional sputtering techniques. We fabricated a viable 12 nm CdS buffer from uniform conformal coating provided by ALD. CIGS with ALD ZnO exhibited superior photovoltaic performances...
In this paper, a 100CMM regenerative thermal oxidizer (RTO) system based on high heating device for low-emission combustion is implemented at volatile organic compound (VOCs) gas generation workplace. Existing RTO has structure that repeats the inflow and discharge of VOCs into cylindrical drum-type rotating disk excellent energy efficiency with heat recovery rate 95% or more. However, when used long time, there problem rotation stops explodes due to pollutants dust expansion temperature...
In this study, we investigated the effect of stacking order metal precursors on formation volume defects, such as blisters and nanopores, in CZTSSe thin-film solar cells. We fabricated thin films using three types metal-precursor combinations, namely, Zn/Cu/Sn/Mo, Cu/Zn/Sn/Mo, Sn/Cu/Zn/Mo, studied blister formation. The blister-formation mechanism was based delamination model, taking into consideration compressive stress adhesion properties. A could be induced during preferential a ZnSSe...
This paper proposes a new architecture for micro light emitting diode (micro-LED) display featuring fingerprint detection without any additional and sensing devices in mobile applications. that conventional LEDs can be used as photodetectors active-matrix pixel circuits. In the area where finger touched, some are others sources. The photocurrents of reverse-biased under various illumination conditions were investigated. circuit was fabricated using p-type low-temperature polycrystalline...
Software engineers now face the difficult task of refactoring serial programs for parallel execution on multicore processors. Currently, they are offered little guidance as to how much benefit may come from this task, or close best possible parallelization. This paper presents Kismet, a tool that creates speedup estimates unparallelized programs. Kismet differs previous approaches in it does not require any manual analysis modification program. difference allows quick many programs, avoiding...