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Title: Interface functionalization of photoelectrodes with graphene for high performance dye-sensitized solar cells
Authors: Chen, Tao
Hu, Weihua
Song, Junling
Guai, Guan Hong
Li, Chang Ming
Issue Date: 2012
Source: Chen, T., Hu, W., Song, J., Guai, G. H., & Li, C. M. (2012). Interface Functionalization of Photoelectrodes with Graphene for High Performance Dye-Sensitized Solar Cells. Advanced Functional Materials, 22(24), 5245-5250.
Series/Report no.: Advanced functional materials
Abstract: The microstructures of photo- and counter-electrodes play critical roles in the performance of dye-sensitized solar cells (DSSCs). In particular, various interfaces, such as fluorinated-tin oxide (FTO)/TiO2, TiO2/TiO2, and TiO2/electrolyte, in DSSCs significantly affect the final power conversion efficiency (PCE). However, research has generally focused more on the design of various nanostructured semiconducting materials with emphasis on optimizing chemical or/and physical properties, and less on these interface functionalizations for performance improvement. This work explores a new application of graphene to modify the interface of FTO/TiO2 to suppress charge recombination. In combination with interfaces functionalization of TiO2/TiO2 for low charge-transport resistance and high charge-transfer rate, the final PCE of DSSC is remarkably improved from 5.80% to 8.13%, achieving the highest efficiency in comparison to reported graphene/TiO2-based DSSCs. The method of using graphene to functionalize the surface of FTO substrate provides a better alternative method to the conventional pre-treatment through hydrolyzing TiCl4 and an approach to reduce the adverse effect of microstructural defect of conducting glass substrate for electronic devices.
ISSN: 1616-3028
DOI: 10.1002/adfm.201201126
Rights: © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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