A5087834678- Organic Electronics and Photovoltaics
- Analytical Chemistry and Sensors
- Acoustic Wave Resonator Technologies
- GaN-based semiconductor devices and materials
- Heart Rate Variability and Autonomic Control
- Advanced Sensor and Energy Harvesting Materials
- Luminescence and Fluorescent Materials
- Hemodynamic Monitoring and Therapy
- Conducting polymers and applications
- Non-Invasive Vital Sign Monitoring
- Nanowire Synthesis and Applications
Ajou University
2024-2025
Inha University
2011
Abstract Photomultiplication organic photodetectors (PM‐OPDs) demonstrate exceptional sensitivity in low‐light environments, making them valuable for imaging, environmental monitoring, and wearable health sensors. However, traditional PM‐OPDs require significantly high operational voltages, which lead to elevated dark current degraded noise performance. To address these limitations, a novel light‐mediated PM‐OPD is introduced that enhances signal gain through cycle of light emission...
Ultra-flexible organic photovoltaic (OPV) devices are gaining recognition due to their lightweight, mechanical flexibility, and high productivity potential emerging as a notable alternative power source. Significant enhancements in material design device architecture have facilitated near 20% of conversion efficiencies (PCEs). To elevate PCE further, the integration soft optical elements is pivotal, enabling optimized photon utilization by minimizing reflection augmenting path through...
We report the production of AlN nanowires by thermal heating method, for exploring their photoluminescence properties.The room-temperature properties were investigated with different annealing environment.While broad emissions peaks at around 2.45 and 2.95 eV obtained from both unannealed annealed samples, additional 2.1 peak was found samples.We have suggested possible emission mechanisms based on assumption that are ascribed to nitrogen vacancies.Annealing in N 2 environment exhibited...
Photoplethysmography (PPG) sensors, which utilize light to detect blood volume changes in the skin, offer advantages over traditional methods by being non-contact, avoiding electrical stimulation, and integrating seamlessly with wearable devices. However, conventional PPG sensors are primarily composed of rigid, inorganic materials, limiting their flexibility causing discomfort during prolonged use. To overcome these challenges, recent research has focused on flexible using organic,...