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Enhanced light harvesting in plasmonic dye-sensitized solar cells by using a topologically ordered gold
Nailiang Yang1, Qi Yuan, Jin Zhai
1Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, PR China.
Abstract:
Dye-sensitized solar cells (DSSCs) are promising low-cost, high-efficiency devices with low environmental impact. One of the important methods to improve their efficiencies involves increasing the light-harvesting efficiency. Earlier work has focused on varying the morphology of the photoanode. With such a hierarchical structured photoanode in hand, we modify herein the structure of the counter electrode to enhance the optical path length through the plasmonic and reflecttion effects. With the introduced topological gold layer, the photocurrent and efficiency are increased by 16 % and 18 %, respectively, due to the increased light collection. Besides, this effect is effective at both high and low levels of solar irradiation.
