Transparent bifacial dye-sensitized solar cells based on an electrochemically polymerized organic counter electrode and an iodine-free polymer gel electrolyte

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• 作者：Yaoguang Rong ; Zhiliang Ku ; Xiong Li ; Hongwei Han
• 刊名：Journal of Materials Science
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：50
• 期：10
• 页码：3803-3811
• 全文大小：1,137 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Bifacial transparent dye-sensitized solar cells (DSSCs) assembled with a highly transparent poly(3,4-ethylenedioxythiophene) (PEDOT) counter electrode (CE) and a non-absorptive iodine-free polymer gel electrolyte were developed. The PEDOT CEs were obtained via a facile in situ electrochemical polymerization method. Different charge capacities were applied in the polymerization process, and the PEDOT CEs were optimized with high transparency (>90?%) and favorable activity for catalyzing the reaction between the redox couples in the electrolyte. The gel electrolyte was prepared using an ionic liquid (1,2-dimethyl-3-propylinmidazolium iodide, DMPII) as the charge transfer intermediate and a polymer composite (PEO/PVDF-HFP) as the gelator without the addition of iodine. Besides high conductivity, the iodine-free electrolyte presented non-absorption in visible light region. The assembled bifacial DSSC device showed a power conversion efficiency (PCE) of 6.35?% under front-side irradiation, and 4.98?% under rear-side irradiation with intensity of 100 mW cm?, which approached almost 80?% of that of the front-side irradiation. These promising results demonstrated the potential of these transparent organic CE and non-absorptive polymer gel electrolyte for further applications such as developing transparent bifacial photovoltaics.