Ag2S quantum dots and N3 dye co-sensitized TiO2 nanotube arrays for a solar cell

•TiO2 nanotube arrays were prepared by electrochemical anodization using as-fabricated FTO glass which coated with Ti membrance.•Ag2S quantum dots (QDs) and N3 dye (Ag2S -N3-TNAs) were prepared by the processes of sequential chemical bath deposition (S-CBD) approach.•We assembled the co-sensitized s...

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Bibliographic Details
Published in:Applied surface science 2013-10, Vol.282, p.695-699
Main Authors: Ji, Gangqiang, Liu, Zhongqing, Guan, Debin, Yang, Yuntao
Format: Article
Language:English
Subjects:
Ag2S quantum dots
Arrays
Co-sensitized solar cell
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Density
Dyes
Exact sciences and technology
Nanostructure
Photoelectric conversion
Photoelectric effect
Photovoltaic cells
Physics
Quantum dots
S-CBD
Solar cells
TiO2 nanotube arrays
Titanium dioxide
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Summary:•TiO2 nanotube arrays were prepared by electrochemical anodization using as-fabricated FTO glass which coated with Ti membrance.•Ag2S quantum dots (QDs) and N3 dye (Ag2S -N3-TNAs) were prepared by the processes of sequential chemical bath deposition (S-CBD) approach.•We assembled the co-sensitized solar cells model in form of sandwich.•We researched the transferring of electrons amongst energy band of Ag2S, N3 and TNAs. Ag2S quantum dots (QDs) and N3 dye co-sensitized TiO2 nanotube arrays (Ag2S-N3-TNAs) were prepared by the processes of anodization method followed by sequential chemical bath deposition (S-CBD) approach and dye sensitization, using FTO-based titanium film formed by vacuum ion coating method as a precursor. XRD, EDS, FE-SEM, TEM, UV–vis diffuse reflectance and photo electrochemical measurements were used to characterize the samples. Fabricated co-sensitized solar cell prototype exhibited a photocurrent density of 10.2mAcm−2 and a power conversion efficiency of 4.40% based solar cells, which is higher than that of N3-sensitized TiO2 nanotube arrays (N3-TNAs) (8.5mAcm−2 and 3.64%) under AM 1.5 light irradiation.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2013.06.035