Facile synthesis of size-tunable mesoporous anatase TiO 2 beads using a graft copolymer for quasi-solid and all-solid dye-sensitized solar cells

Dong Kyu Roh, Jin Ah Seo, Won Seok Chi, Jong Kwan Koh, Jong Hak Kim

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Multi-functional mesoporous TiO 2 (M-TiO 2) beads with high porosity and good interconnectivity in the anatase phase were synthesized via a solvothermal reaction at low temperature (100 °C) using a graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM), as a structure-directing agent. Field-emission scanning electron microscopy (FE-SEM), energy-filtering transmission electron microscopy (EF-TEM) and X-ray diffraction (XRD) revealed that the TiO 2 beads consisted of 13 nm interconnected nanocrystallites and were monodisperse with tunable sizes of approximately 120, 250, 500 and 750 nm. The photoelectrodes fabricated with M-TiO 2 beads showed a high surface area (86.5 m 2 g -1) and a stronger light scattering effect, as confirmed by Brunauer-Emmett-Teller (BET) and incident photon-to-electron conversion efficiency (IPCE) measurements. The structures of M-TiO 2 beads effectively offered better pore infiltration of the polymer electrolyte. Furthermore, the improved interconnectivity of M-TiO 2 beads improved the electron diffusion coefficient and electron lifetime, resulting in an improvement in the light harvesting efficiency. Thus, quasi-solid-state polymer electrolyte dye-sensitized solar cells (DSSCs) with M-TiO 2 beads showed a higher efficiency (4.8% at 100 mW cm -2) than those with conventional P25 (3.8%). A structure-property relation among M-TiO 2 beads was investigated in terms of surface area and light scattering. Upon utilizing double layer structures and a solid polymerized ionic liquid (PIL), the efficiency was increased up to 6.7% at 100 mW cm -2, one of the highest values for all-solid-state DSSCs.

Original languageEnglish
Pages (from-to)11079-11085
Number of pages7
JournalJournal of Materials Chemistry
Volume22
Issue number22
DOIs
Publication statusPublished - 2012 Jun 14

Fingerprint

Graft copolymers
Titanium dioxide
Light scattering
Electrolytes
Electrons
Polymers
Ionic Liquids
Nanocrystallites
Ionic liquids
Infiltration
Field emission
Conversion efficiency
Photons
Porosity
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
Dye-sensitized solar cells
titanium dioxide
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

@article{cfd0536a258d4a11803c1fea84d928c2,
title = "Facile synthesis of size-tunable mesoporous anatase TiO 2 beads using a graft copolymer for quasi-solid and all-solid dye-sensitized solar cells",
abstract = "Multi-functional mesoporous TiO 2 (M-TiO 2) beads with high porosity and good interconnectivity in the anatase phase were synthesized via a solvothermal reaction at low temperature (100 °C) using a graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM), as a structure-directing agent. Field-emission scanning electron microscopy (FE-SEM), energy-filtering transmission electron microscopy (EF-TEM) and X-ray diffraction (XRD) revealed that the TiO 2 beads consisted of 13 nm interconnected nanocrystallites and were monodisperse with tunable sizes of approximately 120, 250, 500 and 750 nm. The photoelectrodes fabricated with M-TiO 2 beads showed a high surface area (86.5 m 2 g -1) and a stronger light scattering effect, as confirmed by Brunauer-Emmett-Teller (BET) and incident photon-to-electron conversion efficiency (IPCE) measurements. The structures of M-TiO 2 beads effectively offered better pore infiltration of the polymer electrolyte. Furthermore, the improved interconnectivity of M-TiO 2 beads improved the electron diffusion coefficient and electron lifetime, resulting in an improvement in the light harvesting efficiency. Thus, quasi-solid-state polymer electrolyte dye-sensitized solar cells (DSSCs) with M-TiO 2 beads showed a higher efficiency (4.8{\%} at 100 mW cm -2) than those with conventional P25 (3.8{\%}). A structure-property relation among M-TiO 2 beads was investigated in terms of surface area and light scattering. Upon utilizing double layer structures and a solid polymerized ionic liquid (PIL), the efficiency was increased up to 6.7{\%} at 100 mW cm -2, one of the highest values for all-solid-state DSSCs.",
author = "Roh, {Dong Kyu} and Seo, {Jin Ah} and Chi, {Won Seok} and Koh, {Jong Kwan} and Kim, {Jong Hak}",
year = "2012",
month = "6",
day = "14",
doi = "10.1039/c2jm30826f",
language = "English",
volume = "22",
pages = "11079--11085",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "22",

}

Facile synthesis of size-tunable mesoporous anatase TiO 2 beads using a graft copolymer for quasi-solid and all-solid dye-sensitized solar cells. / Roh, Dong Kyu; Seo, Jin Ah; Chi, Won Seok; Koh, Jong Kwan; Kim, Jong Hak.

In: Journal of Materials Chemistry, Vol. 22, No. 22, 14.06.2012, p. 11079-11085.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Facile synthesis of size-tunable mesoporous anatase TiO 2 beads using a graft copolymer for quasi-solid and all-solid dye-sensitized solar cells

AU - Roh, Dong Kyu

AU - Seo, Jin Ah

AU - Chi, Won Seok

AU - Koh, Jong Kwan

AU - Kim, Jong Hak

PY - 2012/6/14

Y1 - 2012/6/14

N2 - Multi-functional mesoporous TiO 2 (M-TiO 2) beads with high porosity and good interconnectivity in the anatase phase were synthesized via a solvothermal reaction at low temperature (100 °C) using a graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM), as a structure-directing agent. Field-emission scanning electron microscopy (FE-SEM), energy-filtering transmission electron microscopy (EF-TEM) and X-ray diffraction (XRD) revealed that the TiO 2 beads consisted of 13 nm interconnected nanocrystallites and were monodisperse with tunable sizes of approximately 120, 250, 500 and 750 nm. The photoelectrodes fabricated with M-TiO 2 beads showed a high surface area (86.5 m 2 g -1) and a stronger light scattering effect, as confirmed by Brunauer-Emmett-Teller (BET) and incident photon-to-electron conversion efficiency (IPCE) measurements. The structures of M-TiO 2 beads effectively offered better pore infiltration of the polymer electrolyte. Furthermore, the improved interconnectivity of M-TiO 2 beads improved the electron diffusion coefficient and electron lifetime, resulting in an improvement in the light harvesting efficiency. Thus, quasi-solid-state polymer electrolyte dye-sensitized solar cells (DSSCs) with M-TiO 2 beads showed a higher efficiency (4.8% at 100 mW cm -2) than those with conventional P25 (3.8%). A structure-property relation among M-TiO 2 beads was investigated in terms of surface area and light scattering. Upon utilizing double layer structures and a solid polymerized ionic liquid (PIL), the efficiency was increased up to 6.7% at 100 mW cm -2, one of the highest values for all-solid-state DSSCs.

AB - Multi-functional mesoporous TiO 2 (M-TiO 2) beads with high porosity and good interconnectivity in the anatase phase were synthesized via a solvothermal reaction at low temperature (100 °C) using a graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM), as a structure-directing agent. Field-emission scanning electron microscopy (FE-SEM), energy-filtering transmission electron microscopy (EF-TEM) and X-ray diffraction (XRD) revealed that the TiO 2 beads consisted of 13 nm interconnected nanocrystallites and were monodisperse with tunable sizes of approximately 120, 250, 500 and 750 nm. The photoelectrodes fabricated with M-TiO 2 beads showed a high surface area (86.5 m 2 g -1) and a stronger light scattering effect, as confirmed by Brunauer-Emmett-Teller (BET) and incident photon-to-electron conversion efficiency (IPCE) measurements. The structures of M-TiO 2 beads effectively offered better pore infiltration of the polymer electrolyte. Furthermore, the improved interconnectivity of M-TiO 2 beads improved the electron diffusion coefficient and electron lifetime, resulting in an improvement in the light harvesting efficiency. Thus, quasi-solid-state polymer electrolyte dye-sensitized solar cells (DSSCs) with M-TiO 2 beads showed a higher efficiency (4.8% at 100 mW cm -2) than those with conventional P25 (3.8%). A structure-property relation among M-TiO 2 beads was investigated in terms of surface area and light scattering. Upon utilizing double layer structures and a solid polymerized ionic liquid (PIL), the efficiency was increased up to 6.7% at 100 mW cm -2, one of the highest values for all-solid-state DSSCs.

UR - http://www.scopus.com/inward/record.url?scp=84861316182&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861316182&partnerID=8YFLogxK

U2 - 10.1039/c2jm30826f

DO - 10.1039/c2jm30826f

M3 - Article

AN - SCOPUS:84861316182

VL - 22

SP - 11079

EP - 11085

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 22

ER -