Please use this identifier to cite or link to this item:
|Title:||Enhancement of the performance of dye-sensitized solar cell by formation of shallow transport levels under visible light illumination|
|Authors:||Wang, Q. |
|Citation:||Wang, Q., Zhang, Z., Zakeeruddin, S.M., Grätzel, M. (2008-05-01). Enhancement of the performance of dye-sensitized solar cell by formation of shallow transport levels under visible light illumination. Journal of Physical Chemistry C 112 (17) : 7084-7092. ScholarBank@NUS Repository. https://doi.org/10.1021/jp800426y|
|Abstract:||The performance enhancement of dye-sensitized solar cells (DSCs) in lithium-free and lithium-containing electrolytes under visible light-soaking was examined by impedance spectroscopy and photovoltage transient decay measurements. The improvement was found to arise from the formation of electronic transport levels close to the conduction band, resulting most likely from photoinduced proton intercalation in the TiO2 nanoparticles. These shallow trapping states accelerate the charge carrier transport within the nanocrystalline films without deteriorating the open circuit photovoltage. Subjecting the cells to forward bias in the dark produces a similar effect, whereas the introduction of lithium ions in the electrolyte suppresses the phenomena due to prevailing lithium ion intercalation. The redistribution of localized states in the band gap of TiO2 and the resulting conduction band edge movement appears to play a significant role in the performance of the DSC. © 2008 American Chemical Society.|
|Source Title:||Journal of Physical Chemistry C|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 20, 2018
WEB OF SCIENCETM
checked on Apr 16, 2018
checked on Mar 12, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.