Date of Award
2013
Publisher
North Dakota State University
Document Type
Dissertation
Degree Awarded
Doctor of Philosophy (PhD)
Department
Chemistry and Biochemistry
College
Science and Mathematics
Faculty Advisor
Kose, Erkan
Description
Conjugated polymers are wide bandgap semiconductors which have a series of conjugated π-orbitals that extend along the polymer ‘backbone’. The π-orbital conjugation can be disrupted by twisting of the polymer, affecting their optical properties. These materials are very useful for devices, where they are frequently found in semicrystalline thin films. In thin films, Frenkel excitons diffuse on a nanometer scale. However, measurement of the diffusion length of excitons in conjugated polymer films is currently very difficult. Disordered packing and twisting of polymers plays a significant role, but has not been examined in detail. This dissertation presents methods of measuring exciton diffusion length in polymer films and nanoparticles and explains the effect of nuclear disorder on the optical spectra and exciton diffusion in semicrystalline polymer films.
Recommended Citation
Bjorgaard, Josiah August, "Exciton Diffusion, Transport, and Localization in Conjugated Polymers" (2013). Chemistry and Biochemistry. 57.
https://digitalcommons.ndsu.edu/chem-biochem/57
Rights
NDSU Policy 190.6.2
Rights Link
https://www.ndsu.edu/fileadmin/policy/190.pdf
Handle Identifier
https://hdl.handle.net/10365/27196