Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"optical modeling"”.
-
Optical Modeling of Solar Cells
… and time consuming. Computer simulations of the optical and electrical functions allow for eliminating large class of ineffective combinations and containing the parameter space significantly.</p><p> We modeled solar cell as a stack of layers. The wavelength dependent dielectric permittivity …
-
Optical modeling of organic electronic devices
… or excitons in organic materials necessitates optical models that extend beyond classical far field methods. In this thesis we propose an extended near field calculation method using dyadic Green's functions and demonstrate the applications of both our extended model and traditional far field …
-
Optical Modeling And Analysis Of Disordered Plasmonic Nanoparticle Ensembles
… to establish models describing the effective optical properties of these systems as an ensemble average. Various analytical and numerical electrodynamic calculations will be performed to analyze the dependence of the effective optical response on structural parameters of the ensembles. The …
-
Optical modeling off-stoichiometric amorphous Al2O3 thin films deposited by reactive sputtering
… brought up by previous research about how the optical properties of alumina droplets/particles found in solid rocket motors are related to their stoichiometry. We approached this question by adopting methods common in thin film technology. Alumina/aluminum/off-stoichiometric thin films were …
-
Accelerating Embedded HOWFSC Algorithms
… execution of two foundational HOWFSC algorithms: optical modeling and Electric Field Conjugation (EFC). Optical modeling underpins both Jacobian-based EFC, and a relatively new variant of EFC, called adjoint-based EFC. The two main contributions of this thesis are to port bottleneck HOWFSC …
-
Optical Investigations of Cd Free Cu<sub>2</sub>ZnSnS<sub>4</sub> Solar Cells
We conducted optical simulations with the goal of determining the optimal design of the Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) solar cells with In<sub>2</sub>S<sub>3</sub>, ZnS and ZnSe as buffer layers. The model is parameterized with the complex index of refraction of each layer in the stack. …
-
Tri-phase emulsions as tunable liquid lenses with aberration correction
… a compound lens. Adapting this approch to fluid optical elements, we assess the potential of tri-phase emulsions to correct primary aberrations. We combine optical modeling, fabrication and experimental characterization of tri-phase emulsions and compare their optical properties to bi-phase …
-
Optical and Electrical Enhancement of Organic Solar Cells.
… neglected by researchers. Two of these are optical light trapping to increase absorption and control of interfaces to reduce energy loss. This thesis makes contributions to both of these goals in three ways. First, some surprising results from the optical modeling of organic solar cells at …
-
Materials and strategies for flexible, stretchable and large area photonic devices
… of merit in the visible range of operation. Optical modeling by finite domain time domain simulations will be incorporated to achieve optimized device design. Similarly, large area and highly stretchable plasmonic nanoparticle arrays will be obtained to show large resonance tuning for the …
-
Development of low-temperature solution-processed colloidal quantum dot-based solar cells
… current density-voltage characteristics, optical modeling, and capacitance measurements, the combined diffusion length and depletion width in the PbS QD layer is found to be approximately 170 nm. In the organic/inorganic hybrid device, poly(3-hexylthiophene-2,5-diyl) (P3HT) nanofibers and …
-
Epitaxial growth and plasmonic coupling in topological insulator heterostructures
… and spin-momentum locked Dirac Fermions. The optical transitions among these surface states, for example Dirac plasmon polariton, are in the far-IR THz spectral range, which is hardly accessed by traditional semiconductors. These unique properties enable TI a promising platform for far-IR …
-
Investigation of physical and electro-optic diffractive structures for energy-efficient smart window applications
… its ability to have control over the window’s optical properties such that they adapt to changing environments. A wide variety of technologies to improve window efficiency have been researched to date, including various mechanical and optical methods, but none has shown the ability to …
-
Materials and design strategies for solar microcells
… by careful engineering and incorporation of optical elements and materials external to the devices. These optical elements and materials include periodically nanostructured semi-transparent metallic reflectors that are integrated below microcells, a light trapping structure on the cell’s …
-
Charge carrier recombination and open circuit voltage in organic solar cells
… with these inorganic sub-cells on the basis of optical modeling predictions for the optimal layer thicknesses to finally reach record efficiencies for this type of solar cells. In the second part, organic model systems will be investigated to gain a better understanding of the fundamental loss …