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Study on the change in photovoltage by control of cell gap in dye-sensitized solar cells / Chaehyeon Lee in Transactions of the ASME. Journal of solar energy engineering, Vol. 132 N° 2 (Mai 2010) 

Public ISBD [article]  in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021104/1-5] Titre : Study on the change in photovoltage by control of cell gap in dye-sensitized solar cells Type de document : texte imprimé Auteurs : Chaehyeon Lee, Auteur ; Weekyung Kang, Auteur ; Min Jae Ko, Auteur Année de publication : 2011 Article en page(s) : pp. [021104/1-5] Note générale : Energie Solaire Langues : Anglais (eng) Mots-clés : Dyes  Electrochemical  impedance  spectroscopy  Electrolytes  Electron-hole  recombination  Solar  cells Index. décimale : 621.47 Résumé : Photo-electrochemical properties of dye-sensitized solar cells (DSSCs) were investigated by changing the gap between working and counter electrodes. The open-circuit voltage (VOC) of DSSCs was significantly increased from 616 mV to 776 mV by about 26% with 1-methyl-3-butyl imidazolium iodide (BMII) based electrolyte and from 428 mV to 513 mV by 20% with lithium iodide (LiI) based electrolyte as the cell gap increased from 16 µm to 224 µm. From the electrochemical impedance spectroscopy, it was found that the resistance of the electrolyte was increased as the cell gap widened. This resulted in the reduction in the dark current associated with the VOC enhancement. The transient photovoltage spectroscopic measurement confirmed that the time constant for charge recombination between TiO2 and electrolyte became slower as the cell gap of the DSSC with LiI electrolyte increased, which could be an additional reason for the VOC enhancement. The optimal cell gap was determined to be around 31.3 µm for the BMII electrolyte system, and around 75.5 µm for the LiI electrolyte system in terms of the energy-conversion efficiency. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...] [article] Study on the change in photovoltage by control of cell gap in dye-sensitized solar cells [texte imprimé] / Chaehyeon Lee, Auteur ; Weekyung Kang, Auteur ; Min Jae Ko, Auteur . - 2011 . - pp. [021104/1-5]. Energie Solaire Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021104/1-5] Mots-clés : Dyes  Electrochemical  impedance  spectroscopy  Electrolytes  Electron-hole  recombination  Solar  cells Index. décimale : 621.47 Résumé : Photo-electrochemical properties of dye-sensitized solar cells (DSSCs) were investigated by changing the gap between working and counter electrodes. The open-circuit voltage (VOC) of DSSCs was significantly increased from 616 mV to 776 mV by about 26% with 1-methyl-3-butyl imidazolium iodide (BMII) based electrolyte and from 428 mV to 513 mV by 20% with lithium iodide (LiI) based electrolyte as the cell gap increased from 16 µm to 224 µm. From the electrochemical impedance spectroscopy, it was found that the resistance of the electrolyte was increased as the cell gap widened. This resulted in the reduction in the dark current associated with the VOC enhancement. The transient photovoltage spectroscopic measurement confirmed that the time constant for charge recombination between TiO2 and electrolyte became slower as the cell gap of the DSSC with LiI electrolyte increased, which could be an additional reason for the VOC enhancement. The optimal cell gap was determined to be around 31.3 µm for the BMII electrolyte system, and around 75.5 µm for the LiI electrolyte system in terms of the energy-conversion efficiency. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...]