Photovoltaic performance of Pb-doped CdS quantum dots for solar cell application

•Un-doped and Pb-doped CdS were successfully deposited on TiO2 surface.•Optical response was found to be high for 2% Pb-doped CdS.•The absorption was increased may be due to the creation of additional energy levels.•The highest power conversion efficiency was 1.19% for 2% Pb-doped CdS. The successiv...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2018-06, Vol.220, p.74-77
Main Authors: Veerathangam, K., Senthil Pandian, Muthu, Ramasamy, P.
Format: Article
Language:English
Subjects:
Adsorption
Cadmium sulfide
Deposition
Materials science
Morphology
Nanoparticles
Nanostructured materials
Photovoltaic cells
Quantum dots
Solar energy materials
Structural
Surfaces
Thin films
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Un-doped and Pb-doped CdS were successfully deposited on TiO2 surface.•Optical response was found to be high for 2% Pb-doped CdS.•The absorption was increased may be due to the creation of additional energy levels.•The highest power conversion efficiency was 1.19% for 2% Pb-doped CdS. The successive ionic layer adsorption and reaction (SILAR) method was employed to deposit the un-doped CdS and Pb-doped CdS quantum dots (QDs) with different doping concentrations over the TiO2 nanostructures. The systematic investigations of photoanode were carried out and the observed results reveal that the deposited sensitized layer has spherical morphology. Polycrystalline nature of the deposited film was observed, but the characteristic peaks for Pb or PbS are not observed. However, the presence of lead was confirmed through energy dispersive X-ray spectrum (EDX) and elemental mapping study. The superior optical absorption and photovoltaic performance were observed in the 2% Pb-doped CdS QDs sensitized cell. The corresponding cell parameter values such as η, Jsc, Voc and FF were 1.19%, 3.76 mA/cm2, 0.61 V and 51.5% respectively.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.03.007