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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c01094
|2 doi
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|a pubmed24n1091.xml
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|a (NLM)34185544
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|a DE-627
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|a eng
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|a Topuzlu, Ezgi Yılmaz
|e verfasserin
|4 aut
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|a Role of Water in the Lyotropic Liquid Crystalline Lithium Iodide-Iodine-Water-C12E10 Mesophase as a Gel Electrolyte in a Dye-Sensitized Solar Cell
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|c 2021
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 13.07.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a By replacing volatile and flammable organic-based electrolytes with gel electrolytes, dye-sensitized solar cells (DSSCs) may be a viable and more practical alternative to other clean energy sources. Although they present a promising alternative, gel electrolytes still have some drawbacks for practical applications, such as low ionic conductivity and infusion difficulties into the pores of the working electrode. Here, we introduce a new one-step fabrication method that uses a lyotropic liquid crystalline (LLC) gel electrolyte (LiI:I2:H2O:C12H25(OCH2CH2)10OH) and a dye (N719) to construct a DSSC that performs (7.32%) 2.2 times better compared with a traditional two-step production. Water plays a key role in the gel electrolyte, where the H2O/LiI mole ratio is around 2.57 under ambient laboratory conditions (ALCs); however, this ratio linearly increases to 4.00 and then to 5.85 at 40 and 75% humidities, respectively, without affecting the two-dimensional (2D) hexagonal structure of the mesophase. The ionic conductivity of the gel electrolyte linearly increases accordingly, by 2.2 (4.8 × 10-5 to 10.6 × 10-5) and 13.1 times (63.0 × 10-5 S/cm) from ALC to 40 and ALC to 75% humidity, respectively. Increasing water in the gel phase improves the conductivity of the LLC mesophase and the short-circuit current (Isc) of the DSSC, but negatively influences the open-circuit voltage (Voc) of the cell, equilibrium reaction between the LiI and I2, and the anchoring of the dye molecules over the titania surface
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|a Journal Article
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|a Ulgut, Burak
|e verfasserin
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|a Dag, Ömer
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 37(2021), 27 vom: 13. Juli, Seite 8305-8313
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:37
|g year:2021
|g number:27
|g day:13
|g month:07
|g pages:8305-8313
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|u http://dx.doi.org/10.1021/acs.langmuir.1c01094
|3 Volltext
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