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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Quantum Dot-Dye Bilayer-Sensitized Solar Cells: Breaking the Limits Imposed by the Low Absorbance of Dye Monolayers
Menny Shalom1, Josep Albero1, Zion Tachan1
1Institute of Nanotechnology & Advanced Materials, Department of Chemistry, Bar-Ilan University, 52900 Ramat Gan, Israel, Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans 16, E-46007 Tarragona, Spain, and Institució Catalana de Recerca I Estudis Avançats (ICREA), Avda. Lluís Companys 23, E-08010 Tarragona, Spain.
Abstract:
Here, we present a new DSSC design, consisting of sequential QDs and dye sensitization layers, that opens the path toward high optical density DSSCs that cover a significant part of the solar spectrum. The new configuration is enabled by the application of an amorphous TiO2 layer between the two sensitizers, allowing both electron injection from the outer absorber and fast hole extraction from the inner sensitizing layer. Utilizing two sensitizing layers, we obtain a 250% increase in cell efficiency compared to a QD monolayer cell.
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