Research Papers

Application of silver nanoparticles as an interfacial layer in cadmium sulfide quantum dot sensitized solar cells

[+] Author Affiliations
Fatemeh Doosthosseini, Abbas Behjat, Naeimeh Torabi

Yazd University, Atomic and Molecular Group, Faculty of Physics, Yazd 89158-18411, Iran

Yazd University, Photonics Research Group, Engineering Research Centre, Yazd 89158-18411, Iran

Sakineh Hashemizadeh

Yazd University, Photonics Research Group, Engineering Research Centre, Yazd 89158-18411, Iran

J. Nanophoton. 9(1), 093092 (Feb 17, 2015). doi:10.1117/1.JNP.9.093092
History: Received October 17, 2014; Accepted January 22, 2015
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Abstract.  Silver (Ag) nanoparticles (NPs) were synthesized and used as an interfacial layer in the photoanode of quantum dot sensitized solar cells (QDSSCs). Two different methods were employed to determine the size and shape of the Ag NPs. Using transmission electron microscopy images and calculations based on Mie theory, a size of 5 nm and a spherical shape were obtained for the sensitized Ag NPs. Then these NPs were applied in a fluorine-doped tin oxide (FTO)/Ag/TiO2/CdS photoanode structure in the QDSSCs. As an interfacial layer, Ag NPs were dip-coated on FTO between an FTO glass and a TiO2 layer. A successive ionic layer adsorption and reaction method was used for deposition of CdS quantum dots on the TiO2 films. A power conversion efficiency of 1.45% was obtained for FTO/Ag/TiO2/CdS cells, which was 40% higher than 1.05% found for noninterfacial layer FTO/TiO2/CdS cells. The easier transport of excited electrons and the inhibition of charge recombination due to the application of an Ag NPs layer are concluded to be responsible for the improved performance of the cells and their increased photocurrent.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Fatemeh Doosthosseini ; Abbas Behjat ; Sakineh Hashemizadeh and Naeimeh Torabi
"Application of silver nanoparticles as an interfacial layer in cadmium sulfide quantum dot sensitized solar cells", J. Nanophoton. 9(1), 093092 (Feb 17, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093092


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