Issue 9, 2011

Spongy structure of CdS nanocrystals decorated with dye molecules for semiconductor sensitized solar cells

Abstract

We exploit a new structure of semiconductor sensitized solar cells, where CdS nanocrystals are assembled into a spongy structure and decorated with organic molecules to serve as photoanode. UV-vis absorption, Nyquist impedance spectra, combining with photocurrent density-voltage characterization demonstrate that the assembled CdS nanocrystals with porous architecture can effectively capture the incoming light and allow thorough infiltration of electrolyte, while the decoration of organic molecules helps to accelerate hole-transfer. As a result, the solar cells with spongy structure show higher absorption, short-circuit-current density, open-circuit voltage, and final performance than traditional semiconductor sensitized solar cells. Our results indicate that it is essential to develop reasonable semiconductor structures for constructing solar cells with high efficiency.

Graphical abstract: Spongy structure of CdS nanocrystals decorated with dye molecules for semiconductor sensitized solar cells

Supplementary files

Article information

Article type
Paper
Submitted
19 Oct 2010
Accepted
29 Nov 2010
First published
24 Jan 2011

J. Mater. Chem., 2011,21, 2883-2889

Spongy structure of CdS nanocrystals decorated with dye molecules for semiconductor sensitized solar cells

T. Ling, M. Wu, K. Niu, J. Yang, Z. Gao, J. Sun and X. Du, J. Mater. Chem., 2011, 21, 2883 DOI: 10.1039/C0JM03530K

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