Enhanced photovoltaic performance and long-term stability of dye-sensitized solar cells by incorporating SiO2 nanoparticles in binary ionic liquid electrolytes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Hsin-Fang Lee
  • Jhih-Lin Wu
  • Po-Ya Hsu
  • Yung-Liang Tung
  • Fan-Yi Ouyang

Detail(s)

Original languageEnglish
Pages (from-to)2-6
Journal / PublicationThin Solid Films
Volume529
Publication statusPublished - 1 Feb 2013
Externally publishedYes

Abstract

Hydrophilic SiO2 nanoparticles in a binary ionic liquid (bi-IL) consisting of 1-propyl-3-methylimidazolium iodide (PMII) and 1-ethyl-3-methyl-imidazolium dicyanimide (EMIDCA) facilitated electron transfer and solidified the electrolyte for a dye-sensitized solar cell (DSC). We investigated the dependence of charge transport and photovoltaic performance on the composition of bi-IL electrolytes with varied ratio of SiO2 nanoparticles. The electrochemical impedance spectra revealed a decreased resistance to charge transfer at the Pt counter electrode (Rct1) when SiO2 (up to 2.0 wt.%) was added, improving the photovoltaic parameters. The DSC based on a TiO2 nanocrystalline film (thickness 14.2 μm) with a composite ionic gel electrolyte of EMIDCA/PMII bi-IL (33 vol.% of EMIDCA) incorporating SiO2 (2 wt.%) exhibited a power conversion efficiency of 5.28% under simulated solar illumination (AM 1.5 G, 100 mW cm- 2). The durability of DSC with a SiO2 solidified electrolyte was superior to that of a liquid one, exhibiting good stability at 60 C in darkness during an accelerated test for 1000 h. © 2012 Elsevier B.V.

Research Area(s)

  • Dye-sensitized solar cells, Electrochemical impedance spectroscopy, Ionic liquid, Long-term stability, Quasi-solid electrolytes

Citation Format(s)

Enhanced photovoltaic performance and long-term stability of dye-sensitized solar cells by incorporating SiO2 nanoparticles in binary ionic liquid electrolytes. / Lee, Hsin-Fang; Wu, Jhih-Lin; Hsu, Po-Ya; Tung, Yung-Liang; Ouyang, Fan-Yi; Kai, Ji-Jung.

In: Thin Solid Films, Vol. 529, 01.02.2013, p. 2-6.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal