The Optimized Thickness of Silver Doping on CdS/CdSe for Quantum Dot-Sensitized Solar Cell

Overall, CdSe:Ag+ quantum dots were prepared by the successive ionic layer absorption and reaction method using two solutions: mixing molar concentrations of 0.003 mM AgNO3 and a Cd(CH3COO)2·2H2O anion to make solution 1 and 2.27 g Se powder and 0.6 M Na2SO3 were dissolved in 100 ml deionized water,...

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Bibliographic Details
Published in:International journal of photoenergy 2019, Vol.2019 (2019), p.1-7
Main Authors: Ha Thanh, Tung, Phuc, Dang Huu
Format: Article
Language:English
Subjects:
Cadmium selenides
Cadmium sulfide
Conduction bands
Deionization
Electrolytes
Material properties
Morphology
Nanoparticles
Optical properties
Photovoltaic cells
Quantum dots
Scanning electron microscopy
Sodium sulfite
Solar cells
Spectrum analysis
Thickness
Titanium dioxide
Valence band
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Summary:Overall, CdSe:Ag+ quantum dots were prepared by the successive ionic layer absorption and reaction method using two solutions: mixing molar concentrations of 0.003 mM AgNO3 and a Cd(CH3COO)2·2H2O anion to make solution 1 and 2.27 g Se powder and 0.6 M Na2SO3 were dissolved in 100 ml deionized water, solution 2. The FTO was coated with TiO2 nanoparticles and then was dipped in both solutions, which created a FTO/TiO2/CdSe:Ag+ photoanode with a thickness of 1 layer to 4 layers. The layers of the CdSe:Ag+ film show an effect on the morphology, crystalline structure, optical properties, and photovoltaic through optical and photovoltaic measurements. Finally, the performance of the device based on a FTO/TiO2/CdSe:Ag+ photoanode with the different thickness increased significantly to exactly 3.96%. Moreover, in the pattern of an explanation of the optical and photovoltaic properties of materials, we use Tauc’s theory to determine the band gap, the conduction band, and the valence band.
ISSN:1110-662X
1687-529X
DOI:10.1155/2019/1069308