Influence of electrolyte co-additives on the performance of dye-sensitized solar cells

Influence of electrolyte co-additives on the performance of dye-sensitized solar cells

The presence of specific chemical additives in the redox electrolyte results in an efficient increase of the photovoltaic performance of dye-sensitized solar cells (DSCs). The most effective additives are 4-tert-butylpyridine (TBP), N-methylbenzimidazole (NMBI) and guanidinium thiocyanate (GuNCS) th...

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Main Authors: Stergiopoulos, Thomas, Rozi, Evangelia, Karagianni, Chaido-Stefania, Falaras, Polycarpos
Format: Online
Language:English
Published: Springer 2011
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211393/
id pubmed-3211393
recordtype oai_dc
spelling pubmed-32113932011-11-09 Influence of electrolyte co-additives on the performance of dye-sensitized solar cells Stergiopoulos, Thomas Rozi, Evangelia Karagianni, Chaido-Stefania Falaras, Polycarpos Nano Express The presence of specific chemical additives in the redox electrolyte results in an efficient increase of the photovoltaic performance of dye-sensitized solar cells (DSCs). The most effective additives are 4-tert-butylpyridine (TBP), N-methylbenzimidazole (NMBI) and guanidinium thiocyanate (GuNCS) that are adsorbed onto the photoelectrode/electrolyte interface, thus shifting the semiconductor's conduction band edge and preventing recombination with triiodides. In a comparative work, we investigated in detail the action of TBP and NMBI additives in ionic liquid-based redox electrolytes with varying iodine concentrations, in order to extract the optimum additive/I2 ratio for each system. Different optimum additive/I2 ratios were determined for TBP and NMBI, despite the fact that both generally work in a similar way. Further addition of GuNCS in the optimized electrolytic media causes significant synergistic effects, the action of GuNCS being strongly influenced by the nature of the corresponding co-additive. Under the best operation conditions, power conversion efficiencies as high as 8% were obtained. Springer 2011-04-07 /pmc/articles/PMC3211393/ /pubmed/21711833 http://dx.doi.org/10.1186/1556-276X-6-307 Text en Copyright ©2011 Stergiopoulos et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Stergiopoulos, Thomas
Rozi, Evangelia
Karagianni, Chaido-Stefania
Falaras, Polycarpos
spellingShingle Stergiopoulos, Thomas
Rozi, Evangelia
Karagianni, Chaido-Stefania
Falaras, Polycarpos
Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
author_facet Stergiopoulos, Thomas
Rozi, Evangelia
Karagianni, Chaido-Stefania
Falaras, Polycarpos
author_sort Stergiopoulos, Thomas
title Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
title_short Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
title_full Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
title_fullStr Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
title_full_unstemmed Influence of electrolyte co-additives on the performance of dye-sensitized solar cells
title_sort influence of electrolyte co-additives on the performance of dye-sensitized solar cells
description The presence of specific chemical additives in the redox electrolyte results in an efficient increase of the photovoltaic performance of dye-sensitized solar cells (DSCs). The most effective additives are 4-tert-butylpyridine (TBP), N-methylbenzimidazole (NMBI) and guanidinium thiocyanate (GuNCS) that are adsorbed onto the photoelectrode/electrolyte interface, thus shifting the semiconductor's conduction band edge and preventing recombination with triiodides. In a comparative work, we investigated in detail the action of TBP and NMBI additives in ionic liquid-based redox electrolytes with varying iodine concentrations, in order to extract the optimum additive/I2 ratio for each system. Different optimum additive/I2 ratios were determined for TBP and NMBI, despite the fact that both generally work in a similar way. Further addition of GuNCS in the optimized electrolytic media causes significant synergistic effects, the action of GuNCS being strongly influenced by the nature of the corresponding co-additive. Under the best operation conditions, power conversion efficiencies as high as 8% were obtained.
publisher Springer
publishDate 2011
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211393/
_version_ 1611486204564340736

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