Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Dye-sensitized solar cells (DSSCs) as a photoelectric power generation device have been intensively studied since these have been developed by Prof. Grätzel group in 1991. The DSSCs have considerable attention and promising candidate for the development of next generation solar cells due to high power conversion efficiency and low production cost.
Generally, DSSCs based on TiO2 nanoparticle is transparent to the solar light and it is impossible to effectively use the incident light. The way to solve the problem is to utilize an efficient light scattering layer on a TiO2 layer and enhance the light absorption by increasing the optical path length.
In the present study, we fabricated the Lu3Al5O12: Ce3+ scattering layer by solid-state reaction method using core-shell materials as an activator and mesoporous TiO2 nanoparticle based photoelectrodes were prepared using doctor blade method on FTO glass. The Lu3Al5O12: Ce3+ phosphor gave rise to visible green-emission. Green light was emitted from the excited dye N719 and yield excess electron. In case of using the phosphor scattering layer, solar energy was converted to electric energy more effectively than by the DSSCs without phosphors, resulting in an increase in photocurrent density. The as-fabricated DSSCs with a green-emitting Lu3Al5O12: Ce3+ phosphor as a scattering layer showed a conversion efficiency of 8.33% compared to the cell without scattering layer (7.1%). The DSSCs based on phosphor scattering layer on TiO2 showed better photovoltaic performance than the cell made of TiO2 nanoparticles.
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