Mathematics Faculty Proceedings, Presentations, Speeches, Lectures

Event Name/Location

46th Midwest 39th Great Lakes Joint Regional ACS Meeting / St. Louis, MO

Event Name

46th Midwest 39th Great Lakes Joint Regional ACS Meeting

Event Location

St. Louis, MO

Document Type

Poster

Publication Date

2011

Date Range

October 19-22, 2011

Abstract

The photoanode of a dye sensitized solar cell is typically a mesoporous titanium dioxide thin film adhered to a conductive glass plate. In the case of TEC-8 glass, an approximately 500 nm film of tin oxide provides the conductivity of this substrate. During the calcining step of photoanode fabrication, tin diffuses into the titanium dioxide layer. Scanning Electron Microscopy and Electron Dispersion Microscopy are used to analyze quantitatively the diffusion of tin through the photoanode. At temperatures (400 to 600 °C) and times (30 to 90 min) typically employed in the calcinations of titanium dioxide layers for dye sensitized solar cells, tin is observed to diffuse through several micrometers of the photoanode. The transport of tin is reasonably described using Fick's Law of Diffusion through a semi-infinite medium with a fixed tin concentration at the interface. Numerical modeling allows for extraction of mass transport parameters that will be important in assessing the degree to which tin diffusion influences the performance of dye sensitized solar cells.

ORCID ID

0000-0001-7817-4308

Included in

Mathematics Commons

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