Dissertation/Thesis Abstract

Nanostructured aminophenylporphyrin films for use in bulk heterojunction and inverse dye-sensitized titanium dioxide solar cells
by Walter, Michael George, Ph.D., Portland State University, 2008, 139; 3358494
Abstract (Summary)

Conductive nanostructured films of poly-tetrakis-5,10,15,20-(4-aminophenyl)porphyrin (TAPP) can be grown electrochemically or through interfacial oxidative polymerization. The poly-TAPP nanomorphology is sensitive to the electrochemical solvent, potentiometric method, and the aminophenyl porphyrin monomer utilized. To elucidate the molecular structure of poly-TAPP and to correlate structures with proposed polymerization and conductivity mechanisms, reflectance FT-IR and spectroelectrochemistry were used to detect the presence and electroactivity of dihydrophenazine and phenazine polymer linkages formed during the polymerization.

Poly-TAPP nanofiber films were evaluated for use in a bulk heterojunction solar cell (with PCBM) and in an inverse dye-sensitized TiO2 solar cell using the poly-TAPP nanoporous scaffold to control the interfacial contact region between donor (poly-TAPP) and acceptor (PCBM or TiO2) phases. Poly-TAPP/PCBM cells exhibited short-circuit current densities of 140 μA/cm 2 and open-circuit potential values up to 500 mV under simulated full-sun illumination. An inverse dye-sensitized solar cell was developed by incorporating TiO2 into a dye-coated nanoporous poly-TAPP electrode. These cells demonstrated short-circuit current densities up to 46 μA/cm 2 and open-circuit potential values of 232 mV under AM 1.5 solar illumination.

Indexing (document details)
School: Portland State University
School Location: United States -- Oregon
Source: DAI-B 70/05, Dissertation Abstracts International
Subjects: Physical chemistry, Polymer chemistry, Materials science
Keywords: Aminophenylporphyrin films, Conductive polymers, Dihydrophenazine, Nanoporous scaffolds, Solar cells, Titanium dioxide
Publication Number: 3358494
ISBN: 978-1-109-17912-5
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