One-pot synthesis of hierarchical mesoporous SnO2 spheres using a graft copolymer: Enhanced photovoltaic and photocatalytic performance

Jung Tae Park, Chang Soo Lee, Jong Hak Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We synthesized hierarchical mesoporous SnO2 (HM-SnO2) spheres with a large surface area (85.3 m2 g-1) via a one-pot controlled solvothermal process using tin chloride pentahydrate and graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) as a Sn precursor and structure directing agent, respectively. Solid-state dye-sensitized solar cells (ssDSSCs) fabricated with HM-SnO 2 spheres on an organized mesoporous SnO2 interfacial (om-SnO2 IF) layer as the photoanode had a long-term stable efficiency of 3.4% at 100 mW cm2, which was much higher than that of ssDSSCs with a photoanode comprising nonporous SnO2 (NP-SnO 2) spheres (1.9%). We attributed the enhanced device performance of ssDSSCs fabricated with the HM-SnO2 photoanode to the well-organized hierarchical structure with dual pores (23.5 and 162.3 nm), which provided a larger surface area, improved light scattering, and decreased charge recombination compared to the nonporous SnO2 (NP-SnO2) photoanode. We confirmed this by reflectance, incident photon to current conversion efficiency (IPCE), and intensity modulated photocurrent/voltage spectroscopy (IMPS/IMVS) measurements. Introduction of an om-SnO2 IF layer between the HM-SnO2 spheres and fluorine-doped tin oxide (FTO) substrate enhanced light harvesting, increased electron transport, reduced charge recombination, and decreased interfacial/internal resistance. Photocatalytic tests indicated that HM-SnO2 spheres showed high activity with good recyclability for photodegradation of methyl orange under UV light irradiation. This journal is

Original languageEnglish
Pages (from-to)31452-31461
Number of pages10
JournalRSC Advances
Volume4
Issue number59
DOIs
Publication statusPublished - 2014

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Graft copolymers
Fluorine
Photodegradation
Tin oxides
Photocurrents
Ultraviolet radiation
Light scattering
Tin
Conversion efficiency
Photons
Irradiation
Spectroscopy
Electric potential
Substrates
Dye-sensitized solar cells

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "One-pot synthesis of hierarchical mesoporous SnO2 spheres using a graft copolymer: Enhanced photovoltaic and photocatalytic performance",
abstract = "We synthesized hierarchical mesoporous SnO2 (HM-SnO2) spheres with a large surface area (85.3 m2 g-1) via a one-pot controlled solvothermal process using tin chloride pentahydrate and graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) as a Sn precursor and structure directing agent, respectively. Solid-state dye-sensitized solar cells (ssDSSCs) fabricated with HM-SnO 2 spheres on an organized mesoporous SnO2 interfacial (om-SnO2 IF) layer as the photoanode had a long-term stable efficiency of 3.4{\%} at 100 mW cm2, which was much higher than that of ssDSSCs with a photoanode comprising nonporous SnO2 (NP-SnO 2) spheres (1.9{\%}). We attributed the enhanced device performance of ssDSSCs fabricated with the HM-SnO2 photoanode to the well-organized hierarchical structure with dual pores (23.5 and 162.3 nm), which provided a larger surface area, improved light scattering, and decreased charge recombination compared to the nonporous SnO2 (NP-SnO2) photoanode. We confirmed this by reflectance, incident photon to current conversion efficiency (IPCE), and intensity modulated photocurrent/voltage spectroscopy (IMPS/IMVS) measurements. Introduction of an om-SnO2 IF layer between the HM-SnO2 spheres and fluorine-doped tin oxide (FTO) substrate enhanced light harvesting, increased electron transport, reduced charge recombination, and decreased interfacial/internal resistance. Photocatalytic tests indicated that HM-SnO2 spheres showed high activity with good recyclability for photodegradation of methyl orange under UV light irradiation. This journal is",
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One-pot synthesis of hierarchical mesoporous SnO2 spheres using a graft copolymer : Enhanced photovoltaic and photocatalytic performance. / Park, Jung Tae; Lee, Chang Soo; Kim, Jong Hak.

In: RSC Advances, Vol. 4, No. 59, 2014, p. 31452-31461.

Research output: Contribution to journalArticle

TY - JOUR

T1 - One-pot synthesis of hierarchical mesoporous SnO2 spheres using a graft copolymer

T2 - Enhanced photovoltaic and photocatalytic performance

AU - Park, Jung Tae

AU - Lee, Chang Soo

AU - Kim, Jong Hak

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AB - We synthesized hierarchical mesoporous SnO2 (HM-SnO2) spheres with a large surface area (85.3 m2 g-1) via a one-pot controlled solvothermal process using tin chloride pentahydrate and graft copolymer, i.e., poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) as a Sn precursor and structure directing agent, respectively. Solid-state dye-sensitized solar cells (ssDSSCs) fabricated with HM-SnO 2 spheres on an organized mesoporous SnO2 interfacial (om-SnO2 IF) layer as the photoanode had a long-term stable efficiency of 3.4% at 100 mW cm2, which was much higher than that of ssDSSCs with a photoanode comprising nonporous SnO2 (NP-SnO 2) spheres (1.9%). We attributed the enhanced device performance of ssDSSCs fabricated with the HM-SnO2 photoanode to the well-organized hierarchical structure with dual pores (23.5 and 162.3 nm), which provided a larger surface area, improved light scattering, and decreased charge recombination compared to the nonporous SnO2 (NP-SnO2) photoanode. We confirmed this by reflectance, incident photon to current conversion efficiency (IPCE), and intensity modulated photocurrent/voltage spectroscopy (IMPS/IMVS) measurements. Introduction of an om-SnO2 IF layer between the HM-SnO2 spheres and fluorine-doped tin oxide (FTO) substrate enhanced light harvesting, increased electron transport, reduced charge recombination, and decreased interfacial/internal resistance. Photocatalytic tests indicated that HM-SnO2 spheres showed high activity with good recyclability for photodegradation of methyl orange under UV light irradiation. This journal is

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