Publication date: 31st July 2014
Plasmonic-metal nanostructures for efficient conversion of solar to chemical energy have been considered as significant promise. Metal nanoparticles (core-shell geometry) may influence the photovoltaic behavior of semiconducting oxides through electron storage effects that can drive the Fermi level to more negative potentials. The use of structure core@shell type (p.e., Au@TiO2) is give rise to a new generation of plasmonic solar cells1. Because of its higher electronic mobility than that of TiO2, similar electron affinity and energy level of the conduction band, zinc oxide (ZnO) has been the object of depth studies for solar cell applications as an alternative to TiO2. Thereby, the focus of the preliminary study Ag nanoparticles with ZnO for application in dye solar cells was sensitized in different conditions experimentals2. The nanocomposites dispersion on ZnO films showed marked increase both photocurrent density (jsc), with contribution from FF. Impedance spectroscopy analysis showed decrease in recombination resistance in the Ag@ZnO/electrolyte interface when compared with DSSCs without metal. Furthermore, an increment in overall conversion efficiency, +60%, was observed in DSSCs with Ag metal nanoparticle.
1 Choi, H.; Chen, W. T.; Kamat, P. V. A. ACS Nano, 2012, 6 (5), pp 4418–4427.
2. Aguirre, M. E.; Rodríguez, H. B.; Román, E. S.; Feldhoff, A.; Grela, M. A. J. Phys. Chem. C, 2011, 115 (50), pp 24967–24974.
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