Development of Dye-sensitized solar cells fabricated with PVDF-HFP-type polymeric Solid electrolytes and titanium dioxide nanotubes

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dye-sensitized solar cells (DSCs) are photoelectrochemical cells consisting of mesoporous TiO2 electrodes sensitized with organic dyes such as ruthenium dyes, Pt counter-electrodes, and I-/I3 - redox electrolytes. Increasing the durability and power conversion efficiency of DSCs are critical goals that willhave to be met before DSCs can be put on the market on a large scale. For increasing durability, we have developed new gel-type polymeric solid electrolytes (PSEs) based on poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) to reduce leakage of the electrolyte solution, which is one of the main factors of poor DSC durability. The use of PSEs, however, is almost always accompanied by a decrease in the short-circuit current density (Jsc). We then studied the electrochemical properties of two different kinds of DSCs to determine why the conversion efficiency is lower in PSE-based DSCs than in liquid electrolyte-based DSCs. The diffusion coefficient of I3 - and the cell-gap (the distance between the surface of the transparent conducting oxide substrate for the TiO2 electrode and that of the Pt counterelectrode) of DSCs were eventually understood to be key factors affecting the Jsc. This indicates that the design of the DSC structure is quite important for achieving higher conversion efficiency in a PSE-based DSC. Further, with the aim of increasing the power conversion efficiency, we have developed ultrahigh-aspect-ratio TiO2 nanotubes (TNTs), made by anodic oxidation of Ti metals in an extremely dilute perchloric acid solution, to establish goodcarrier pathways. Unlike TiO2 nanoparticles (NPs), TNTs of suitable dimensionsserve as efficient light scatterers while also providing large surface areas for chargeseparation. We have succeeded in enhancing the power conversion efficiency of a DSC using a TiO2 electrode with a new bilayer structure, which consists of a light-scattering TNT layer formed upon a light-absorbing NP layer. We also found a promising application for TNTs formed on Ti substrates, i.e. their use in the fabrication of flexible, back-side illuminated DSCs. In this review we present our recent research on DSCs fabricated with PVDF-HFP-type PSEs and ultrahigh-aspect-ratio TNTs.

Original languageEnglish
Pages (from-to)168-179
Number of pages12
JournalJournal of the Japan Petroleum Institute
Volume54
Issue number3
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

Solid electrolytes
Titanium dioxide
Nanotubes
Conversion efficiency
Electrodes
Durability
Electrolytes
Dye-sensitized solar cells
Aspect ratio
Dyes
Nanoparticles
Photoelectrochemical cells
Leakage (fluid)
Anodic oxidation
Substrates
Ruthenium
Electrochemical properties
Short circuit currents
Light scattering
Current density

Keywords

  • Anodic oxidation
  • Dye-sensitized solar cell
  • Light scatterer
  • Polymeric solid electrolyte
  • PVDF-HFP
  • Titanium dioxide nanotube

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

@article{b5083358e83348189b139f2fd813af86,
title = "Development of Dye-sensitized solar cells fabricated with PVDF-HFP-type polymeric Solid electrolytes and titanium dioxide nanotubes",
abstract = "Dye-sensitized solar cells (DSCs) are photoelectrochemical cells consisting of mesoporous TiO2 electrodes sensitized with organic dyes such as ruthenium dyes, Pt counter-electrodes, and I-/I3 - redox electrolytes. Increasing the durability and power conversion efficiency of DSCs are critical goals that willhave to be met before DSCs can be put on the market on a large scale. For increasing durability, we have developed new gel-type polymeric solid electrolytes (PSEs) based on poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) to reduce leakage of the electrolyte solution, which is one of the main factors of poor DSC durability. The use of PSEs, however, is almost always accompanied by a decrease in the short-circuit current density (Jsc). We then studied the electrochemical properties of two different kinds of DSCs to determine why the conversion efficiency is lower in PSE-based DSCs than in liquid electrolyte-based DSCs. The diffusion coefficient of I3 - and the cell-gap (the distance between the surface of the transparent conducting oxide substrate for the TiO2 electrode and that of the Pt counterelectrode) of DSCs were eventually understood to be key factors affecting the Jsc. This indicates that the design of the DSC structure is quite important for achieving higher conversion efficiency in a PSE-based DSC. Further, with the aim of increasing the power conversion efficiency, we have developed ultrahigh-aspect-ratio TiO2 nanotubes (TNTs), made by anodic oxidation of Ti metals in an extremely dilute perchloric acid solution, to establish goodcarrier pathways. Unlike TiO2 nanoparticles (NPs), TNTs of suitable dimensionsserve as efficient light scatterers while also providing large surface areas for chargeseparation. We have succeeded in enhancing the power conversion efficiency of a DSC using a TiO2 electrode with a new bilayer structure, which consists of a light-scattering TNT layer formed upon a light-absorbing NP layer. We also found a promising application for TNTs formed on Ti substrates, i.e. their use in the fabrication of flexible, back-side illuminated DSCs. In this review we present our recent research on DSCs fabricated with PVDF-HFP-type PSEs and ultrahigh-aspect-ratio TNTs.",
keywords = "Anodic oxidation, Dye-sensitized solar cell, Light scatterer, Polymeric solid electrolyte, PVDF-HFP, Titanium dioxide nanotube",
author = "Yoshinori Nishikitani and Takaya Kubo",
year = "2011",
doi = "10.1627/jpi.54.168",
language = "English",
volume = "54",
pages = "168--179",
journal = "Journal of the Japan Petroleum Institute",
issn = "1346-8804",
publisher = "Japan Petroleum Institute",
number = "3",

}

TY - JOUR

T1 - Development of Dye-sensitized solar cells fabricated with PVDF-HFP-type polymeric Solid electrolytes and titanium dioxide nanotubes

AU - Nishikitani, Yoshinori

AU - Kubo, Takaya

PY - 2011

Y1 - 2011

N2 - Dye-sensitized solar cells (DSCs) are photoelectrochemical cells consisting of mesoporous TiO2 electrodes sensitized with organic dyes such as ruthenium dyes, Pt counter-electrodes, and I-/I3 - redox electrolytes. Increasing the durability and power conversion efficiency of DSCs are critical goals that willhave to be met before DSCs can be put on the market on a large scale. For increasing durability, we have developed new gel-type polymeric solid electrolytes (PSEs) based on poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) to reduce leakage of the electrolyte solution, which is one of the main factors of poor DSC durability. The use of PSEs, however, is almost always accompanied by a decrease in the short-circuit current density (Jsc). We then studied the electrochemical properties of two different kinds of DSCs to determine why the conversion efficiency is lower in PSE-based DSCs than in liquid electrolyte-based DSCs. The diffusion coefficient of I3 - and the cell-gap (the distance between the surface of the transparent conducting oxide substrate for the TiO2 electrode and that of the Pt counterelectrode) of DSCs were eventually understood to be key factors affecting the Jsc. This indicates that the design of the DSC structure is quite important for achieving higher conversion efficiency in a PSE-based DSC. Further, with the aim of increasing the power conversion efficiency, we have developed ultrahigh-aspect-ratio TiO2 nanotubes (TNTs), made by anodic oxidation of Ti metals in an extremely dilute perchloric acid solution, to establish goodcarrier pathways. Unlike TiO2 nanoparticles (NPs), TNTs of suitable dimensionsserve as efficient light scatterers while also providing large surface areas for chargeseparation. We have succeeded in enhancing the power conversion efficiency of a DSC using a TiO2 electrode with a new bilayer structure, which consists of a light-scattering TNT layer formed upon a light-absorbing NP layer. We also found a promising application for TNTs formed on Ti substrates, i.e. their use in the fabrication of flexible, back-side illuminated DSCs. In this review we present our recent research on DSCs fabricated with PVDF-HFP-type PSEs and ultrahigh-aspect-ratio TNTs.

AB - Dye-sensitized solar cells (DSCs) are photoelectrochemical cells consisting of mesoporous TiO2 electrodes sensitized with organic dyes such as ruthenium dyes, Pt counter-electrodes, and I-/I3 - redox electrolytes. Increasing the durability and power conversion efficiency of DSCs are critical goals that willhave to be met before DSCs can be put on the market on a large scale. For increasing durability, we have developed new gel-type polymeric solid electrolytes (PSEs) based on poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) to reduce leakage of the electrolyte solution, which is one of the main factors of poor DSC durability. The use of PSEs, however, is almost always accompanied by a decrease in the short-circuit current density (Jsc). We then studied the electrochemical properties of two different kinds of DSCs to determine why the conversion efficiency is lower in PSE-based DSCs than in liquid electrolyte-based DSCs. The diffusion coefficient of I3 - and the cell-gap (the distance between the surface of the transparent conducting oxide substrate for the TiO2 electrode and that of the Pt counterelectrode) of DSCs were eventually understood to be key factors affecting the Jsc. This indicates that the design of the DSC structure is quite important for achieving higher conversion efficiency in a PSE-based DSC. Further, with the aim of increasing the power conversion efficiency, we have developed ultrahigh-aspect-ratio TiO2 nanotubes (TNTs), made by anodic oxidation of Ti metals in an extremely dilute perchloric acid solution, to establish goodcarrier pathways. Unlike TiO2 nanoparticles (NPs), TNTs of suitable dimensionsserve as efficient light scatterers while also providing large surface areas for chargeseparation. We have succeeded in enhancing the power conversion efficiency of a DSC using a TiO2 electrode with a new bilayer structure, which consists of a light-scattering TNT layer formed upon a light-absorbing NP layer. We also found a promising application for TNTs formed on Ti substrates, i.e. their use in the fabrication of flexible, back-side illuminated DSCs. In this review we present our recent research on DSCs fabricated with PVDF-HFP-type PSEs and ultrahigh-aspect-ratio TNTs.

KW - Anodic oxidation

KW - Dye-sensitized solar cell

KW - Light scatterer

KW - Polymeric solid electrolyte

KW - PVDF-HFP

KW - Titanium dioxide nanotube

UR - http://www.scopus.com/inward/record.url?scp=79960017509&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960017509&partnerID=8YFLogxK

U2 - 10.1627/jpi.54.168

DO - 10.1627/jpi.54.168

M3 - Article

AN - SCOPUS:79960017509

VL - 54

SP - 168

EP - 179

JO - Journal of the Japan Petroleum Institute

JF - Journal of the Japan Petroleum Institute

SN - 1346-8804

IS - 3

ER -