Structure-Property Relationships of Self-Assembled Conjugated Polymers
de la Iglesia, Pablo
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Conjugated polymers, due to their unique optical and electronic properties, can be used for applications such as photovoltaic devices, light-emitting diodes, transistors, and organic sensors. Although, conjugated polymers have several promising properties, uses for these materials are often limited by inefficient charge transport. Inducing polymer aggregation improves the efficiency of charge propagation due to an increase on the conjugation length of the polymer and the crystallization of the polymer domains. The scope of this project is to study the self-assembly of conjugated polymers and its effect on the properties of the materials. More specifically, this project aims to control the kinetics of aggregation in order to affect the structural conformation of the polymer and have an impact on the properties of the material. Self-assembly is controlled by changing parameters such as solvent quality, temperature and dopant chemistry. Both structure and properties change in response to the conditions in which the polymer is placed. This means that the properties of the material could be controlled and optimized. Additionally, a protocol to synthesized organic solvent dispersible Poly(3,4-ethylenedioxythiphehe) is developed and studied. This synthesis uses the controlled aggregation of the polymer strands to prevent the polymer from going out of dispersion. This procedure enables the use of one of the most conductive conjugated polymers in applications previously prohibited due to its poor processability.
- Chemical engineering