Bragg stack-functionalized counter electrode for solid-state dye-sensitized solar cells

Jung Tae Park, Jacob H. Prosser, Dong Jun Kim, Jong Hak Kim, Daeyeon Lee

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A highly reflective counter electrode is prepared through the deposition of alternating layers of organized mesoporous TiO2 (om-TiO2) and colloidal SiO2 (col-SiO2) nanoparticles. We present the effects of introducing this counter electrode into dyesensitized solar cells (DSSCs) for maximizing light harvesting properties. The om-TiO2 layers with a high refractive index are prepared by using an atomic transfer radical polymerization and a sol-gel process, in which a polyvinyl chloride-g-poly(oxyethylene) methacrylate graft copolymer is used as a structuredirecting agent. The col-SiO2 layers with a low refractive index are prepared by spin-coating commercially available silica nanoparticles. The properties of the Bragg stack (BS)-functionalized counter electrode in DSSCs are analyzed by using a variety of techniques, including spectroscopic ellipsometry, SEM, UV/Vis spectroscopy, incident photon-to-electron conversion efficiency, electrochemical impedance spectroscopy, and intensity modulated photocurrent/voltage spectroscopy measurements, to understand the critical factors contributing to the cell performance. When incorporated into DSSCs that are used in conjunction with a polymerized ionic liquid as the solid electrolyte, the energy conversion efficiency of this solid-state DSSC (ssDSSC) approaches 6.6 %, which is one of the highest of the reported N719 dye-based ssDSSCs. Detailed optical and electrochemical analyses of the device performance show that this assembly yields enhanced light harvesting without the negative effects of charge recombination or electrolyte penetration, which thus, presents new possibilities for effective light management.

Original languageEnglish
Pages (from-to)856-864
Number of pages9
JournalChemSusChem
Volume6
Issue number5
DOIs
Publication statusPublished - 2013 Jan 1

Fingerprint

dye
Solar cells
electrode
Electrodes
spectroscopy
refractive index
electrolyte
Conversion efficiency
Refractive index
Nanoparticles
Ionic Liquids
Methacrylates
Spectroscopic ellipsometry
Graft copolymers
Solid electrolytes
Spin coating
Free radical polymerization
Ultraviolet spectroscopy
Photocurrents
Electrochemical impedance spectroscopy

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Park, Jung Tae ; Prosser, Jacob H. ; Kim, Dong Jun ; Kim, Jong Hak ; Lee, Daeyeon. / Bragg stack-functionalized counter electrode for solid-state dye-sensitized solar cells. In: ChemSusChem. 2013 ; Vol. 6, No. 5. pp. 856-864.
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Bragg stack-functionalized counter electrode for solid-state dye-sensitized solar cells. / Park, Jung Tae; Prosser, Jacob H.; Kim, Dong Jun; Kim, Jong Hak; Lee, Daeyeon.

In: ChemSusChem, Vol. 6, No. 5, 01.01.2013, p. 856-864.

Research output: Contribution to journalArticle

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