Int. J. of Nanomanufacturing   »   2016 Vol.12, No.3/4

 

 

Title: Cu2-xS nanocrystals prepared by solvothermal method for highly efficient quantum dot sensitised solar cells

 

Authors: S.X. Wang; X.G. Liu; J.J. Tian

 

Addresses:
Institute of Advanced Materials Technology, University of Science and Technology Beijing, Beijing, 100083, China
Institute of Advanced Materials Technology, University of Science and Technology Beijing, Beijing, 100083, China
Institute of Advanced Materials Technology, University of Science and Technology Beijing, Beijing, 100083, China

 

Abstract: Copper chalcogenide nanostructures such as Cu2-xS have been widely used in quantum dot sensitised solar cells (QDSCs) as counter electrode (CE). Owing to larger surface area and higher catalytic activity, the introduction of the nanostructured Cu2-xS CE is regarded as an efficient approach to improve the performance of QDSCs. Here, we report on a Cu2-xS nanostructured CE for QDSCs. The Cu2-xS nanocrystals with the size of ∼50 nm are prepared by solvothermal method at 160°C for 120 minutes. Such nanostructured CE shows better catalytic activity and charge transfer, larger specific surface area and higher power conversion efficiency (PCE) than those of the common Cu2-xS CE prepared by grass foil. In addition, the charge recombination in QDSCs can be reduced by the nanostructured CE. As a result, one of the best PCE of QDSC with the nanostructured Cu2-xS CE is up to 4.52%.

 

Keywords: quantum dot sensitised solar cells; QDSC; counter electrodes; Cu2-xS; power conversion efficiency; PCE; nanocrystals; solvothermal method; quantum dots; copper chalcogenide nanostructures; nanotechnology; catalytic activity; charge transfer; surface area.

 

DOI: 10.1504/IJNM.2016.079215

 

Int. J. of Nanomanufacturing, 2016 Vol.12, No.3/4, pp.363 - 371

 

Submission date: 08 May 2015
Date of acceptance: 27 Nov 2015
Available online: 20 Sep 2016

 

 

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