Simulation of Plasmonic Nanoparticles in Thin Film Solar Cells
Manley, Phillip

HaupttitelSimulation of Plasmonic Nanoparticles in Thin Film Solar Cells
TitelvarianteSimulation von Plasmonischen Nanoteilchen in Dünnschicht Solarzellen
AutorManley, Phillip
Geburtsort: Wrexham, Groß Britannien
GutachterSchmid, Martina
weitere GutachterSchmidt, Frank
Freie SchlagwörterPlasmonics; Optics; Simulation
DDC530 Physik
ZusammenfassungPlasmonic nanoparticles are a promising technology for increasing the absorption in thin film solar cells. This thesis uses optical simulations to understand and optimise the role that plasmonics can play in thin film solar cells.

The basics of plasmonics may be covered using the analytical Mie theory which describes a plane wave interacting with a spherical object. This can be extended to include core-shell spherical objects. A key finding is that if the shell refractive index is higher than the surrounding medium refractive index, the plasmonic scattering and near field will be enhanced compared to shells with a lower refractive index. In order to investigate more complex geometries the finite element method is introduced.

In particular the method is used to simulate arrays of particles on a substrate to build the link between simulation and experiment. Simulations of large area arrays are very computationally expensive, therefore statistical averaging of single particle responses is performed. Using this method the experimental response of a particle array was able to be reproduced in simulations.

Ultra-thin film solar cells are then introduced and some of the issues surrounding these devices are investigated via the scattering matrix method. It is shown that moving away from a metallic back contact to a transparent contact with a separated metallic back reflector increases the absorption in the absorbing layer.

Having studied both plasmonics and ultra-thin film solar cells in isolation, they are then combined firstly using the finite element method. The effect of particle placement within the device structure is investigated. The result is that the best performance enhancement comes from particles integrated directly inside the absorbing layer.

Finally the previous methods of Mie theory for particle simulations and scattering matrix for layered stack simulations are combined to create a coupled method capable of rapid simulation of devices with integrated plasmonic nanoparticles. This model is then used to assess many different device structures with the optimum being found for Ag core /
AlSb shell nanoparticles integrated into the absorbing layer of a device with a transparent back contact and an incoherent Ag back reflector. This ultra-thin device is able to reach 93% of the current of a conventional thin film while only using 20% of the absorber
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Seitenzahlxviii, 159 Seiten
Fachbereich/EinrichtungFB Physik
Rechte Nutzungsbedingungen
Tag der Disputation23.05.2016
Erstellt am18.07.2016 - 07:41:36
Letzte Änderung21.07.2016 - 14:18:46
Statische URLhttp://www.diss.fu-berlin.de/diss/receive/FUDISS_thesis_000000102531