A5100399775- Organic Light-Emitting Diodes Research
- Design Education and Practice
- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Engineering Education and Curriculum Development
- Biomedical and Engineering Education
- Creativity in Education and Neuroscience
- Technology Assessment and Management
- Engineering Education and Pedagogy
- Luminescence and Fluorescent Materials
- Photochemistry and Electron Transfer Studies
- Problem and Project Based Learning
- Traffic Prediction and Management Techniques
- Liquid Crystal Research Advancements
- Research Data Management Practices
- Systems Engineering Methodologies and Applications
- Human Mobility and Location-Based Analysis
- Sport and Mega-Event Impacts
- Quantum Dots Synthesis And Properties
- Engineering Applied Research
- Material Properties and Processing
- Green IT and Sustainability
- Molecular Junctions and Nanostructures
- Advanced Sensor and Energy Harvesting Materials
- Nanomaterials and Printing Technologies
Purdue University West Lafayette
2018-2024
Korea Advanced Institute of Science and Technology
2014-2020
University of Florida
2020
Northwestern University
2019
Seoul National University
2012
Korea Maritime and Ocean University
2011
Abstract Graphene-based organic light-emitting diodes (OLEDs) have recently emerged as a key element essential in next-generation displays and lighting, mainly due to their promise for highly flexible light sources. However, efficiency has been, at best, similar that of conventional, indium tin oxide-based counterparts. We here propose an ideal electrode structure based on synergetic interplay high-index TiO 2 layers low-index hole-injection sandwiching graphene electrodes, which results...
Abstract High efficiency is important for successful deployment of any light sources. Continued efforts have recently made it possible to demonstrate organic light-emitting diodes with comparable that inorganic diodes. However, such achievements were only the help a macroscopic lens or complex internal nanostructures, both which undermine key benefits as an affordable planar source. Here we present systematic way achieve ultrahigh even external scattering film, one simplest low-cost...
Contribution: Increased understanding of the influence a project-based multidisciplinary design and innovation course on students' engineering thinking, specifically regarding problem framing. Background: Entrepreneurship-related education has been offered to technology students, but its discussed mainly in terms self-efficacy or awareness entrepreneurship technological innovation, relying mostly their self-reported data. Research Questions: 1) How do undergraduate students perceive...
Abstract An optical functional film applicable to various lighting devices is demonstrated in this study. The phase separation of two immiscible polymers a common solvent was used fabricate the film. In paper, self-organized lens-like structure realized manner with OLED For an OLED, there are few drawbacks, including light confinement or viewing angle distortion. By applying angular spectra distortion resulting from designed organic stack which produced highest efficiency successfully...
Strategies to achieve efficient transparent organic light-emitting diodes (TrOLEDs) are presented. The emission zone position is carefully adjusted by monitoring the optical phase change upon reflection from top electrode, which significant when thickness of capping layer changes. With proposed design strategy, external quantum efficiency and transmittance values as high 15% 80% demonstrated simultaneously. effect surface plasmon polariton (SPP) loss thin metal electrodes also taken into...
Indoxacarb 수화제 및 입상수화제 살포액 조제 시 농작업자의 노출량 측정을하여 두 제형 간 노출 양상을 비교하였으며 위해성 평가를 실시하였다. 손 측정은 면 장갑을 사용하였고 호흡노출량은 personal air monitor를 이용하였으며, 측정을 위한 다양한 분석/시험방법을 검증하였다. 분석 기기의 검출한계는 0.25 ng, 정량한계는 1 ng로 설정하였고, 표준 검량선의 직선성은 <TEX>$R^2$</TEX>이 0.9999 이상이었으며, 분석재현성은 C.V값이 0.7~6.0이었다. 또한 3수준으로 수행한 시료(장갑, 고체 흡착제, 유리섬유필터)에서 indoxacarb의 분석법의 회수율은 81.5-108.8% 이었고, 호흡 실험의 검증 중에서 포집효율 파과실험 결과 90.4-112.0%의 회수율을 보였다. 30반복의 노출량의 75percentile 값은 수화제는 459.8 mg/kg a.i이며, 입상수화제는 81.4 a.i로, 수화제가 입상수화제에 비해 6배 이상...
Area-selective external light extraction films based on wrinkle structured were applied to large transparent organic light-emitting diodes (TOLEDs) with auxiliary metal buses. To be specific, the surface of glass, we selectively formed a film, which was aligned electrodes. The wrinkle-structured film patterned using photo-mask and UV curing, has same shape With this area-selective it possible enhance quantum efficiencies bottom top emissions TOLEDs by 15.7% 15.1%, respectively, without...
Engineering education has increasingly become an area of interest at the P-12 level, yet attempts to align engineering knowledge, skills, and habits existing elementary secondary educational programming have been parochial in nature (e.g., for a specific context, grade, or initiative). Consequently, need exists establish coherent content framework teaching learning, which would serve as both epistemological foundation subject guide design developmentally appropriate standards, performance...
Polarizer-free high contrast-ratio organic light-emitting diodes (OLEDs) are explored with a structure involving semi-reflective Cr-based bottom electrode and dielectric-capped thin Ag top electrode. Their efficiency is shown to be improved significantly little sacrifice in luminous reflectance by adopting low-refractive-index injection layers that can increase the effective from simultaneously reduce loss owing surface plasmon polariton modes. OLEDs employing layer exhibit current up ca....
Polarizer-free, high-contrast-ratio organic light-emitting diodes (OLEDs) are demonstrated using a microcavity structure in conjunction with neutral-density (ND) attenuation filters. The reduction of the OLED efficiency associated ND filters is compensated for by enhancement resonance. Furthermore, absorption photons from cavity eases requirement optical density (OD) filter. reflectance proposed devices filter an OD 0.4 less than 20% throughout visible-wavelength region, and their luminous...
Empathic design involves two social practices – collaboration with users and intra team forshared empathic understandings. This study is focused on the latter phenomenon, aiming to characterise a mechanism underlying it. To achieve this objective, we used framework of perspective-mixing in design, including three distinct perspectives: first, second, third-person perspectives. With framework, traced how members share integrate individuals' user knowledge insights develop apply their shared...
Random Al2O3 nanoparticle-based polymer composite films are investigated as external scattering layers to enhance light extraction from flexible organic light-emitting diodes (OLEDs). We found that the size and concentration of nanoparticles (NPs) in film play a crucial role improving extraction. It turned out their increase has favorable impact on output devices, high NPs leads formation large nanoparticle clusters, which, turn, yield pore-containing films. As result, efficiency OLEDs PEN...
Design tasks are characterized by high levels of complexity and uncertainty.Accordingly, in engineering design practices, engineers communicate, share, integrate their different viewpoints orientations to develop a deeper understanding the problem space broaden solution space.In this context, is usually taught team-based learning environments, students' teaming evaluated as one objectives courses.The evaluation has tended rely on self-or peer-reported data.The peer-evaluation process can...
Abstract In addressing the challenge of rising healthcare costs, medical technology innovation is needed to reduce improve outcomes, and make care accessible affordable. Meanwhile, biomedical engineers are increasingly asked develop user-centered solutions. Nevertheless, making solution desirable among users has been often neglected in process. To engineering educators, it remains unclear how effectively stimulate potential an undergraduate curriculum as there a lack studies discussing...
Abstract In the innovation process, design practice involves multiple iterations of framing and reframing under high levels uncertainty ambiguity. Additionally, as user desirability is a significant criterion for innovative design, designers' empathy in process considered critical user-centered ability that engineering students should develop. this context, study aims to discuss how problem manifestation interplay process. As an exploratory study, investigates biomedical (BME) students'...