Wide band gap metal oxides have recently become one of the most investigated materials in
surface science. Among these metal oxides especially TiO2 attracts great interest, because of
its wide range applications, low cost, biocompatibility and ease of analysis by all experimental
techniques. The usage of TiO2 as a component in solar cell technology is one of the most
investigated applications of TiO2 . The wide band gap of TiO2 renders it inecient for isolated
use in solar cells. TiO2 surface are therefore coated with a dye in order to increase eciency.
This type of solar cells are called dye sensitized solar cells .
The eciency of dye sensitized solar cells is directly related with the absorbed light portion of
the entire solar spectrum by the dye molecule. Inspite of the early dyes, recent dye molcules,
which are called wider wavelength response dye molecules, can absorb a larger portion of
entire solar spectrum. Thus, the eciency of dye sensitized solar cells is increased by a
considerably amount.
In this thesis the electronic structure of organic rings, which are the fundamental components
of the dye molecules, adsorbed on anatase (001) surface is analyzed using density functionaltheory. The main goal is to obtain a trend in the electronic structure of the system as a function of increasing ring number. Electronic structure analysis is conducted through band structure
and density of states calculations. Results are presented and discussed in the framework of
dye sensitized solar cells theory.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12610846/index.pdf |
| Date | 01 August 2009 |
| Creators | Torun, Engin |
| Contributors | Toffoli, Hande |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0021 seconds