Accession Number:

ADA626408

Title:

Novel Polymers for High Efficiency Renewable and Portable Power Applications

Descriptive Note:

Final rept. 1 May 2011-30 Apr 2015

Corporate Author:

NORFOLK STATE UNIV VA

Personal Author(s):

Report Date:

2015-07-30

Pagination or Media Count:

35.0

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 polymerdye blend system, this could be attributed to more convenient reach of polymerdye 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-HOMOA-LUMO of the DA pairs or increasing the temperature, or both

Subject Categories:

  • Polymer Chemistry
  • Electrooptical and Optoelectronic Devices
  • Electric Power Production and Distribution

Distribution Statement:

APPROVED FOR PUBLIC RELEASE