Presentation Type
Oral Presentation
Start Date
5-8-2024 9:00 AM
End Date
5-8-2024 11:00 AM
Subjects
Photocathodes
Advisor
Theresa McCormick
Student Level
Doctoral
Abstract
Contemporary dye-sensitized solar cells are far less efficient than silicon solar panels, therefore this project seeks to develop an improved dye sensitized photocathode. Tellurorhodamine dyes, including mesityl derivatives and tellurium black, have been chosen to increase efficiency through increased light harvesting. The photophysical and electrochemical properties of tellurorhodamines with varying structures are analyzed to quantify its efficiency to serve as a dye sensitized photo cathode. Dyes undergo aerobic oxidation facilitated by light, the absorption profile is obtained before and after. Mesityl derivatives are known to experience significant red-shifting following aerobic oxidation. At its base oxidation state, tellurium black experiences an even greater redshift than the oxidized mesityl derivative. Furthermore, mesityl derivatives reversibly undergo reduction and oxidation, as examined by cyclic voltammetry. Open circuit voltage demonstrates that the dye automatically oxidizes in the presence of light and then electronically reduces back in dark conditions. The effect of aerobic oxidation on the other tellurorhodamine derivatives is not known currently as they are still being investigated in this project.
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Included in
Photocathodes From Aerobic Oxidation of Tellurorhodamines
Contemporary dye-sensitized solar cells are far less efficient than silicon solar panels, therefore this project seeks to develop an improved dye sensitized photocathode. Tellurorhodamine dyes, including mesityl derivatives and tellurium black, have been chosen to increase efficiency through increased light harvesting. The photophysical and electrochemical properties of tellurorhodamines with varying structures are analyzed to quantify its efficiency to serve as a dye sensitized photo cathode. Dyes undergo aerobic oxidation facilitated by light, the absorption profile is obtained before and after. Mesityl derivatives are known to experience significant red-shifting following aerobic oxidation. At its base oxidation state, tellurium black experiences an even greater redshift than the oxidized mesityl derivative. Furthermore, mesityl derivatives reversibly undergo reduction and oxidation, as examined by cyclic voltammetry. Open circuit voltage demonstrates that the dye automatically oxidizes in the presence of light and then electronically reduces back in dark conditions. The effect of aerobic oxidation on the other tellurorhodamine derivatives is not known currently as they are still being investigated in this project.