Enhancing the performance of dye-sensitized solar cells by incorporating nanosilicate platelets in gel electrolyte

Handle URI:
http://hdl.handle.net/10754/598196
Title:
Enhancing the performance of dye-sensitized solar cells by incorporating nanosilicate platelets in gel electrolyte
Authors:
Lai, Yi-Hsuan; Chiu, Chih-Wei; Chen, Jian-Ging; Wang, Chun-Chieh; Lin, Jiang-Jen; Lin, King-Fu; Ho, Kuo-Chuan
Abstract:
Two kinds of gel-type dye-sensitized solar cells (DSSCs), composed of two types of electrolytes, were constructed and the respective cell performance was evaluated in this study. One electrolyte, TEOS-Triton X-100 gel, was based on a hybrid organic/inorganic gel electrolyte made by the sol-gel method and the other was based on poly(vinyidene fluoride-co-hexafluoro propylene) (PVDF-HFP) copolymer. TEOS-Triton X-100 gel was based on the reticulate structure of silica, formed by hydrolysis, and condensation of tetraethoxysilane (TEOS), while its organic subphase was a mixture of surfactant (Triton X-100) and ionic liquid electrolytes. Both DSSC gel-type electrolytes were composed of iodine, 1-propy-3-methyl-imidazolium iodide, and 3-methoxypropionitrile to create the redox couple of I3 -/I-. Based on the results obtained from the I-V characteristics, it was found that the optimal iodine concentrations for the TEOS-Triton X-100 gel electrolyte and PVDF-HFP gel electrolyte are 0.05 M and 0.1 M, respectively. Although the increase in the iodine concentration could enhance the short-circuit current density (JSC), a further increase in the iodine concentration would reduce the JSC due to increased dark current. Therefore, the concentration of I2 is a significant factor in determining the performance of DSSCs. In order to enhance cell performance, the addition of nanosilicate platelets (NSPs) in the above-mentioned gel electrolytes was investigated. By incorporating NSP-Triton X-100 into the electrolytes, the JSC of the cells increased due to the decrease of diffusion resistance, while the open circuit voltage (VOC) remained almost the same. As the loading of the NSP-Triton X-100 in the TEOS-Triton X-100 gel electrolyte increased to 0.5 wt%, the JSC and the conversion efficiency increased from 8.5 to 12 mA/cm2 and from 3.6% to 4.7%, respectively. However, the JSC decreased as the loading of NSP-Triton X-100 exceeded 0.5 wt%. At higher NSP-Triton X-100 loading, NSPs acted as a barrier interface between the electrolyte and the dye molecules, hindering electron transfer, hence, reducing the cell's photocurrent density. The same behavior was also observed in the PVDF-HFP gel electrolyte DSSC system. © 2009 Elsevier B.V. All rights reserved.
Citation:
Lai Y-H, Chiu C-W, Chen J-G, Wang C-C, Lin J-J, et al. (2009) Enhancing the performance of dye-sensitized solar cells by incorporating nanosilicate platelets in gel electrolyte. Solar Energy Materials and Solar Cells 93: 1860–1864. Available: http://dx.doi.org/10.1016/j.solmat.2009.06.027.
Publisher:
Elsevier BV
Journal:
Solar Energy Materials and Solar Cells
Issue Date:
Oct-2009
DOI:
10.1016/j.solmat.2009.06.027
Type:
Article
ISSN:
0927-0248
Sponsors:
This work was financially supported by the National Science Council (NSC) of Taiwan, the Republic of China, under Grant NSC 97-2120-M-002-012. This work was partially supported by the King Abdullah University of Science and Technology (KAUST) through the Global Research Partnership Centers-in-Development grant (KAUST GRP-CID). Some instruments used in this study were supported by the Academia Sinica, Taipei, Taiwan, the Republic of China, under Grant AS-97-TP-A08.
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DC FieldValue Language
dc.contributor.authorLai, Yi-Hsuanen
dc.contributor.authorChiu, Chih-Weien
dc.contributor.authorChen, Jian-Gingen
dc.contributor.authorWang, Chun-Chiehen
dc.contributor.authorLin, Jiang-Jenen
dc.contributor.authorLin, King-Fuen
dc.contributor.authorHo, Kuo-Chuanen
dc.date.accessioned2016-02-25T13:14:30Zen
dc.date.available2016-02-25T13:14:30Zen
dc.date.issued2009-10en
dc.identifier.citationLai Y-H, Chiu C-W, Chen J-G, Wang C-C, Lin J-J, et al. (2009) Enhancing the performance of dye-sensitized solar cells by incorporating nanosilicate platelets in gel electrolyte. Solar Energy Materials and Solar Cells 93: 1860–1864. Available: http://dx.doi.org/10.1016/j.solmat.2009.06.027.en
dc.identifier.issn0927-0248en
dc.identifier.doi10.1016/j.solmat.2009.06.027en
dc.identifier.urihttp://hdl.handle.net/10754/598196en
dc.description.abstractTwo kinds of gel-type dye-sensitized solar cells (DSSCs), composed of two types of electrolytes, were constructed and the respective cell performance was evaluated in this study. One electrolyte, TEOS-Triton X-100 gel, was based on a hybrid organic/inorganic gel electrolyte made by the sol-gel method and the other was based on poly(vinyidene fluoride-co-hexafluoro propylene) (PVDF-HFP) copolymer. TEOS-Triton X-100 gel was based on the reticulate structure of silica, formed by hydrolysis, and condensation of tetraethoxysilane (TEOS), while its organic subphase was a mixture of surfactant (Triton X-100) and ionic liquid electrolytes. Both DSSC gel-type electrolytes were composed of iodine, 1-propy-3-methyl-imidazolium iodide, and 3-methoxypropionitrile to create the redox couple of I3 -/I-. Based on the results obtained from the I-V characteristics, it was found that the optimal iodine concentrations for the TEOS-Triton X-100 gel electrolyte and PVDF-HFP gel electrolyte are 0.05 M and 0.1 M, respectively. Although the increase in the iodine concentration could enhance the short-circuit current density (JSC), a further increase in the iodine concentration would reduce the JSC due to increased dark current. Therefore, the concentration of I2 is a significant factor in determining the performance of DSSCs. In order to enhance cell performance, the addition of nanosilicate platelets (NSPs) in the above-mentioned gel electrolytes was investigated. By incorporating NSP-Triton X-100 into the electrolytes, the JSC of the cells increased due to the decrease of diffusion resistance, while the open circuit voltage (VOC) remained almost the same. As the loading of the NSP-Triton X-100 in the TEOS-Triton X-100 gel electrolyte increased to 0.5 wt%, the JSC and the conversion efficiency increased from 8.5 to 12 mA/cm2 and from 3.6% to 4.7%, respectively. However, the JSC decreased as the loading of NSP-Triton X-100 exceeded 0.5 wt%. At higher NSP-Triton X-100 loading, NSPs acted as a barrier interface between the electrolyte and the dye molecules, hindering electron transfer, hence, reducing the cell's photocurrent density. The same behavior was also observed in the PVDF-HFP gel electrolyte DSSC system. © 2009 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was financially supported by the National Science Council (NSC) of Taiwan, the Republic of China, under Grant NSC 97-2120-M-002-012. This work was partially supported by the King Abdullah University of Science and Technology (KAUST) through the Global Research Partnership Centers-in-Development grant (KAUST GRP-CID). Some instruments used in this study were supported by the Academia Sinica, Taipei, Taiwan, the Republic of China, under Grant AS-97-TP-A08.en
dc.publisherElsevier BVen
dc.subjectDye-sensitized solar cellsen
dc.subjectGel electrolytesen
dc.subjectNanosilicate plateletsen
dc.titleEnhancing the performance of dye-sensitized solar cells by incorporating nanosilicate platelets in gel electrolyteen
dc.typeArticleen
dc.identifier.journalSolar Energy Materials and Solar Cellsen
dc.contributor.institutionNational Taiwan University, Taipei, Taiwanen
dc.contributor.institutionNational Chung Hsing University, Taichung, Taiwanen
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