A5059989929- Advanced Materials and Mechanics
- solar cell performance optimization
- Spacecraft and Cryogenic Technologies
- Polymer composites and self-healing
- Hybrid Renewable Energy Systems
- Methane Hydrates and Related Phenomena
- Cellular and Composite Structures
- Thin-Film Transistor Technologies
- Photovoltaic Systems and Sustainability
- Rocket and propulsion systems research
- Silicon and Solar Cell Technologies
- Additive Manufacturing and 3D Printing Technologies
- Organic Electronics and Photovoltaics
- Adhesion, Friction, and Surface Interactions
- Advanced Sensor and Energy Harvesting Materials
- Laser and Thermal Forming Techniques
University of California, Irvine
2023-2024
Irvine University
2022-2023
Seoul National University
2022
Rutgers, The State University of New Jersey
2022
Pomona College
2015
We report on the degradation of organic photovoltaic (OPV) cells in both indoor and outdoor environments. Eight different research groups contributed state art OPV to be studied at Pomona College. Power conversion efficiency fill factor were determined from IV curves collected regular intervals over six eight months. Similarly prepared devices measured indoors, outdoors, after dark storage. Device architectures are compared. Cells kept indoors performed better than outdoors due lack...
Shape memory polymers are gaining significant interest as one of the major constituent materials for emerging field 4D printing. While 3D-printed metamaterials with shape show unique thermomechanical behaviors, their thermal transport properties have received relatively little attention. Here, we that in strongly depends on shape, solid volume fraction, and temperature radiation plays a critical role. Our infrared thermography measurements reveal mechanisms varying shapes from bulk to...
Here the authors present an active thermal control system using 4Dprinted shape memory polymers and demonstrate how distinct deformation mechanisms lead to unique, tunable properties stretching- bending-dominated architectures. Infrared thermography measurements with varying temperature compression settings show that at low strains, radiation drives effective conductance increase as view factors among struts increasing strain, higher conduction strut-to-strut contact areas increase. The...
We report on the degradation of organic photovoltaic (OPV) cells in both indoor and outdoor environments. Eight different research groups contributed state art OPV to be studied at Pomona College. Power conversion efficiency, fill factor, IV curves were collected regular intervals over six eight months. Similarly prepared devices measured indoors, outdoors, after dark storage. Device architectures are compared. Cells kept indoors performed better than outdoors due lack temperature humidity...
Abstract Here the authors present a thermal switch design composed of stimuli-responsive material (SRM) component paired with structured (SM) for insulation applications. A numerical model is used to assess performance point versus area contact in vacuum environment where emissivity set ε ≥ 0.00, conduction-based analytical developed validate when = 0.00. governed by at singular ON state enhance transport compared OFF state. Conversely, an state, occurs across cross-sectional rather than...
Abstract Hydrogen is an element that can be stored via phase change through compression or liquification by varying temperature and pressure, physical chemical bonding. This study provides a closed-form transient model of spherical liquid hydrogen storage tank heated over time with validation provided numerical model. The analytical couples the lumped capacitance approach heat equation, thermal diffusivity for hollow glass bubble (HGB) insulation uses combination effective medium theory...