Assembly of CdS Quantum Dots onto Hierarchical TiO2 Structure for Quantum Dots Sensitized Solar Cell Applications

Abstract

Quantum dot (QD) sensitized solar cells based on Hierarchical TiO2 structure (HTS) consisting of spherical nano-urchins on transparent conductive fluorine doped tin oxide glass substrate is fabricated. The hierarchical TiO2 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 TiO2 structure shows a current density JSC = 1.44 mA, VOC = 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.

Investigations on Multiexciton Generation and Hot Electron Transfer Process in CdTe QD-Decorated TiO2 Nanostructures for Effective Photocatalytic Activity

“…The hydrothermal reaction was performed in an oven at 180 °C for 12 h. Post reaction, the oven was cooled down normally. The solid particles were washed with ethanol and deionized water several times and dried overnight at 70 °C, followed by calcination at 450 °C for 60 min. , …”

“…The solid particles were washed with ethanol and deionized water several times and dried overnight at 70 °C, followed by calcination at 450 °C for 60 min. 20,21 Synthesis of CdTe QDs. Synthesis of CdTe QDs was carried out under the aqueous phase by utilizing capping agents.…”

Quantum Dot Sensitized Solar Cells: A Promising Avenue for Next-Generation Energy Conversion

“…To attain improved light harvesting efficiency across a wide range of wavelengths, including the visible and near-infrared regions, quantum dots-based surface-emitting solar cells (QDSSCs) make use of the distinctive characteristics of colloidal quantum dots (QDs) (Ali et al, 2015).…”

Simultaneous Growth of Rutile TiO2 Nanorod on FTO Plate by One-Step Hydrothermal Process for CdS Sensitized Solar Cell Applications

“…The band gap of bulk CdS is ~2.42 eV from the literature [9]. The bandgap of FTO/TiO2/CdS-8 is higher than bulk, so it's indicated that CdS nanocrystals are obey the quantum confinement effect [22]. These electrons passed through the counterpart and then, enter the electrolyte and the process is repeated.…”