Thin films of solid-state polymer electrolytes for dye-sensitized solar cells

Venkatesan, Nguyen Huong Tra My, Hsisheng Teng, Yuh Lang Lee

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

For the first time, thin films of solid-state polymer electrolytes (SSPEs) are developed for dye-sensitized solar cells (DSCs). Firstly, poly(ethylene oxide) (PEO)/polyethylene glycol (PEG) blend and acetonitrile-based iodide liquid electrolyte are utilized to prepare the gel-electrolytes. The gel-electrolytes are then cast onto a glass substrate, fabricating the solvent-free SSPEs by evaporating the solvent. To assemble the solid-state DSCs, these films are sandwiched between photoelectrodes and counter electrodes with the aid of a heating and pressing process to enhance the penetration of the SSPEs into the photoelectrodes. The infra-red spectroscopy and thermogravimetric analysis confirm the absence of solvent in the electrolyte films. The optimization studies reveal that, at the PEO/PEG ratio of 7/3, the solid-state DSC can achieve a power conversion efficiency (PCE) of 7.23%. The PCE of the solid-state cell can be increased further to 8.13% by introduction of 2 wt% TiO2 nanofillers in the SSPEs, attributed to the increase in the ion diffusivity, electrolyte conductivity, charge recombination resistance and charge transfer at the counter electrode/SSPEs interface. The solid-state DSCs have high stability, retaining 98% of their original efficiency after a 700-h test period. This study demonstrates the applicability of the novel solid-state electrolyte films for preparing the solid-state DSCs.

原文English
文章編號232896
期刊Journal of Power Sources
564
DOIs
出版狀態Published - 2023 4月 30

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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