Novel chemically cross-linked solid state electrolyte for dye-sensitized solar cells

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• 作者：Xiong Yin ; Weiwei Tan ; Wangchun Xiang ; Yuan Lin ; Jingbo Zhang ; Xurui Xiao ; Xueping Li ; Xiaowen Zhou ; Shibi Fang
• 关键词：Dye-sensitized solar cells ; Cross-linked ; Solid state electrolyte ; Ionic conductivity ; Quaterisation
• 刊名：Electrochimica Acta
• 出版年：2010
• 出版时间：1 August 2010
• 年：2010
• 卷：55
• 期：20
• 页码：5803-5807
• 全文大小：374 K

文摘

Poly(vinylpyridine-co-ethylene glycol methyl ether methacrylate) (P(VP-co-MEOMA)) and α,ω-diiodo poly(ethylene oxide-co-propylene oxide) (I[(EO)_0.8-co-(PO)_0.2]_yI) were synthesized and used as chemically cross-linked precursors of the electrolyte for dye-sensitized solar cells. Meanwhile, α-iodo poly(ethylene oxide-co-propylene oxide) methyl ether (CH₃O[(EO)_0.8-co-(PO)_0.2]_xI) was synthesized and added into the electrolyte as an internal plasticizer. Novel polymer electrolyte resulting from chemically cross-linked precursors was obtained by the quaterisation at 90 °C for 30 min. The characteristics for this kind of electrolyte were investigated by means of ionic conductivity, thermogravimetric and photocurrent–voltage. The ambient ionic conductivity was significantly enhanced to 2.3 × 10⁻⁴ S cm⁻¹ after introducing plasticizer, modified-ionic liquid. The weight loss of the solid state electrolyte at 200 °C was 1.8 % , and its decomposition temperature was 287 °C. Solid state dye-sensitized solar cell based on chemically cross-linked electrolyte presented an overall conversion efficiency of 2.35 % under AM1.5 irradiation (100 mW cm⁻²). The as-fabricated device maintained 88 % of its initial performance at room temperature even without sealing for 30 days, showing a good stability.