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Feimeng Zhou, California State University, Los Angeles

Enhancing Conversion Efficiency of Dye-Sensitized Solar Cells by Synthesis of Highly Ordered Titania Structures and Judicious Selection of Redox Couples. h u. e -. e -. h +. Structure of Sensitizer. Electrode. = PDDA. = QD. = Sensitizer.

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Feimeng Zhou, California State University, Los Angeles

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  1. Enhancing Conversion Efficiency of Dye-Sensitized Solar Cells by Synthesis of Highly Ordered Titania Structures and Judicious Selection of Redox Couples hu e- e- h+ Structure of Sensitizer Electrode = PDDA = QD = Sensitizer Feimeng Zhou, California State University, Los Angeles Using layer-by-layer deposition method, we have immobilized CdS quantum dots (QDs) and polydiallydimethylammonium onto conductive glass electrode. Such an assembly can also be coated with a sensitizer (top figure). Significant photocurrents were observed upon irradiation the as-prepared electrodes with UV light (bottom figure), suggesting the feasibility of using QD and/or a photosensitizer-coated QD assembly to convert light energy into electrical current. Future research will focus on the elucidation of the possible difference between the QD (red curve in the bottom figure) and the sensitizer-coated electrode (black curve) and thoroughly examine the performance of the photoelectrochemical cell.

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