Assembly of CdS Quantum Dots onto Hierarchical TiO(2) Structure for Quantum Dots Sensitized Solar Cell Applications

Quantum dot (QD) sensitized solar cells based on Hierarchical TiO(2) structure (HTS) consisting of spherical nano-urchins on transparent conductive fluorine doped tin oxide glass substrate is fabricated. The hierarchical TiO(2) structure consisting of spherical nano-urchins on transparent conductive fluorine doped tin oxide glass substrate synthesized by hydrothermal route. The CdS quantum dots were grown by the successive ionic layer adsorption and reaction deposition method. The quantum dot sensitized solar cell based on the hierarchical TiO(2) structure shows a current density J(SC) = 1.44 mA, V(OC) = 0.46 V, FF = 0.42 and η = 0.27%. The QD provide a high surface area and nano-urchins offer a highway for fast charge collection and multiple scattering centers within the photoelectrode.