Novel Polymers for High Efficiency Renewable and Portable Power Applications
Abstract
This research revealed several important or critical information: 1) Too much LUMO offset or electron transfer driving force between the polymer and dye would result in weaker PL quenching and optoelectronic device power conversion efficiency, this experimentally confirmed some earlier theoretical speculation or prediction and could become another evidence for the inverted region of Marcus electron transfer model. The results could be very useful for materials design for developing high efficiency organic and polymer based optoelectronic devices; 2) Optimum LUMO offset or highest PL quenching appears much more critical than molar absorption coefficient for polymer-dye based optoelectronic conversion efficiency. 3) The optoelectronic performance of covalent attached polymer-dye system is much better than the polymer/dye blend system, this could be attributed to more convenient reach of polymer/dye interface of photo generated excitons in the covalent system resulting in more efficient exciton dissociations. 4) For thermoelectric studies, it appears the thermoelectric charge carrier generations of the four conjugated polymers doped with iodine at room temperature are in the normal region of the Marcus electron transfer model. An optimal thermoelectric charge generation condition may be identified with further decreasing the orbital offsets (D-HOMO/A-LUMO) of the D/A pairs or increasing the temperature, or both
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 30, 2015
- Accession Number
- ADA626408
Entities
People
- Sam-Shajing Sun
Organizations
- Norfolk State University