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Title: Molecular Design of Doped Polymers for Thermoelectric Systems-Final Technical Report

The self-assembly of organic semiconducting molecules and polymers is critical for their electrical properties. This project addressed the design of organic semiconductors with novel synthetic building blocks for proton-dopable conducting materials and the molecular order and microstructure of high performance semiconducting polymers blended with charge transfer dopants. Novel azulene donor-acceptor materials were designed and synthesized with unique electronic effects upon protonation to generate charged species in solution. The microstructure and optical properties of these derivatives were examined to develop structure-property relationships. Studies of the microstructure of blends of charge transfer doped semiconducting polymers revealed highly ordered conductive phases in blends. The molecular packing of one blend was studied in detail using a combination of solid-state NMR and x-ray scattering revealing that dopant incorporation is unlikely to be random as assumed in transport models. Studies of the electrical properties of these highly ordered blends revealed a universal trend between the thermopower and electrical conductivity of semiconducting polymers that is independent of the doping mechanism.
Authors:
 [1] ;  [1]
  1. University of California, Santa Barbara
Publication Date:
OSTI Identifier:
1095902
Report Number(s):
DOE-UCSB-05414
DOE Contract Number:
SC0005414
Resource Type:
Technical Report
Research Org:
UNIVERSITY OF CALIFORNIA, SANTA BARBARA
Sponsoring Org:
USDOE SC Office of Basic Energy Sciences (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE polymers, semiconductors, self-assembly