Development of Dye-Sensitized Solar Cells Composed of Liquid Crystal Embedded, Electrospun Poly(vinylidene fluoride-co-hexafluoropropylene) Nanofibers as Polymer Gel Electrolytes
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- 作者：Sung Kwang Ahn ; Taewon Ban ; P. Sakthivel ; Jae Wook Lee ; Yeong-Soon Gal ; Jin-Kook Lee ; Mi-Ra Kim ; Sung-Ho Jin
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：April 25, 2012
- 年：2012
- 卷：4
- 期：4
- 页码：2096-2100
- 全文大小：272K
- 年卷期：v.4,no.4(April 25, 2012)
- ISSN：1944-8252
文摘
In order to overcome the problems associated with the use of liquid electrolytes in dye-sensitized solar cells (DSSCs), a new system composed of liquid crystal embedded, polymer electrolytes has been developed. For this purpose, three types of DSSCs have been fabricated. The cells contain electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (e-PVdF-co-HFP) polymer gel electrolyte, with and without doping with the liquid crystal E7 and with a liquid electrolyte. The morphologies of the newly prepared DSSCs were explored using field emission scanning electron microscopy (FE-SEM). Analysis of the FE-SEM images indicate that the DSSC composed of E7 embedded on e-PVdF-co-HFP polymer gel electrolyte has a greatly regular morphology with an average diameter. The ionic conductivity of E7 embedded on e-PVdF-co-HFP polymer gel electrolyte was found to be 2.9 脳 10鈥? S/cm at room temperature, a value that is 37% higher than that of e-PVdF-co-HFP polymer gel electrolyte. The DCCS containing the E7 embedded, e-PVdF-co-HFP polymer gel electrolyte was observed to possess a much higher power conversion efficiency (PCE = 6.82%) than that of an e-PVdF-co-HFP nanofiber (6.35%). In addition, DSSCs parameters of the E7 embedded, e-PVdF-co-HFP polymer gel electrolyte (Voc = 0.72 V, Jsc = 14.62 mA/cm2, FF = 64.8%, and PCE = 6.82% at 1 sun intensity) are comparable to those of a liquid electrolyte (Voc = 0.75 V, Jsc = 14.71 mA/cm2, FF = 64.9%, and PCE = 7.17%, both at a 1 sun intensity).