Research Papers

Enhancement of the performance of cadmium sulfide quantum dot solar cells using a platinum–polyaniline counter electrode and a silver nanoparticle-sensitized photoanode

[+] Author Affiliations
Hamzeh Nourolahi, Mohammadagha A. Bolorizadeh

Graduate University of Advanced Technology, Photonics Research Group, Research Institute of Science and High Technology and the Environmental Sciences, Kerman, Iran

Navid Dorri, Abbas Behjat

Yazd University, Photonics Research Group, Department of Physics, Faculty of Science, Yazd, Iran

J. Nanophoton. 11(3), 036001 (Jul 06, 2017). doi:10.1117/1.JNP.11.036001
History: Received March 28, 2017; Accepted June 16, 2017
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Abstract.  A metal-polymer nanocomposite of platinum–polyaniline (Pt/PANI) was deposited on fluorine-doped tin oxide glass substrates to function as a counter electrode for polysulfide redox reactions in cadmium sulfide quantum dot-sensitized solar cells. In addition, front-side illuminated photoelectrodes were sensitized by silver (Ag) nanoparticles (NPs) as an interfacial layer between a transparent conducting oxide substrate and a TiO2 layer. This configuration, i.e., both the Pt/PANI counter electrode and the Ag NPs in the photoanode, leads to 1.92% in the power-conversion efficiency (PCE) of the fabricated cells. A PCE enhancement of around 21% was obtained for the Ag NPs-sensitized photoanodes, as compared with the Ag NPs-free one. The improved performance can be attributed to the easier transport of excited electrons and the inhibition of charge recombination due to the application of an Ag NPs layer. Electrochemical impedance spectroscopy measurements showed that once Ag NPs are incorporated in a photoanode, electron transport time decreases in the photoanode structure.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Hamzeh Nourolahi ; Mohammadagha A. Bolorizadeh ; Navid Dorri and Abbas Behjat
"Enhancement of the performance of cadmium sulfide quantum dot solar cells using a platinum–polyaniline counter electrode and a silver nanoparticle-sensitized photoanode", J. Nanophoton. 11(3), 036001 (Jul 06, 2017). ; http://dx.doi.org/10.1117/1.JNP.11.036001


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