Preparation of nanoporous MgO-coated TiO 2 nanoparticles and their application to the electrode of dye-sensitized solar cells

Hyun Suk Jung; Jung Kun Lee; Michael Nastasi; Sang Wook Lee; Jin Young Kim; Jong Sung Park; Kug Sun Hong; Hyunho Shin

doi:10.1021/la051807d

Preparation of nanoporous MgO-coated TiO ₂ nanoparticles and their application to the electrode of dye-sensitized solar cells

Hyun Suk Jung, Jung Kun Lee, Michael Nastasi, Sang Wook Lee, Jin Young Kim, Jong Sung Park, Kug Sun Hong, Hyunho Shin

Research output: Contribution to journal › Article › peer-review

211 Scopus citations

Abstract

Sol-gel-derived Mg(OH) ₂ gel was coated onto TiO ₂ nanoparticles, and the subsequent thermal topotactic decomposition of the gel formed a highly nanoporous MgO crystalline coating. The specific surface area of the electrode that was prepared from the core-shell-structured TiO ₂ nanoparticles significantly increased compared with that of the uncoated TiO ₂ electrode. The increase in the specific surface area of the MgO-coated TiO ₂ electrode was attributed to the highly nanoporous MgO coating layer that resulted from the topotactic reaction. Dye adsorption behavior and solar cell performance were significantly enhanced by employing the MgO-coated TiO ₂ electrode. Optimized coating of a MgO layer on TiO ₂ nanoparticles enhanced the energy conversion efficiency as much as 45% compared to that of the uncoated TiO ₂ electrode. This indicates that controlling the extrinsic parameters such as the specific surface area is very important to improve the energy conversion efficiency of TiO ₂-based solar cells.

Original language	English
Pages (from-to)	10332-10335
Number of pages	4
Journal	Langmuir
Volume	21
Issue number	23
DOIs	https://doi.org/10.1021/la051807d
State	Published - 8 Nov 2005

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title = "Preparation of nanoporous MgO-coated TiO 2 nanoparticles and their application to the electrode of dye-sensitized solar cells",

abstract = "Sol-gel-derived Mg(OH) 2 gel was coated onto TiO 2 nanoparticles, and the subsequent thermal topotactic decomposition of the gel formed a highly nanoporous MgO crystalline coating. The specific surface area of the electrode that was prepared from the core-shell-structured TiO 2 nanoparticles significantly increased compared with that of the uncoated TiO 2 electrode. The increase in the specific surface area of the MgO-coated TiO 2 electrode was attributed to the highly nanoporous MgO coating layer that resulted from the topotactic reaction. Dye adsorption behavior and solar cell performance were significantly enhanced by employing the MgO-coated TiO 2 electrode. Optimized coating of a MgO layer on TiO 2 nanoparticles enhanced the energy conversion efficiency as much as 45% compared to that of the uncoated TiO 2 electrode. This indicates that controlling the extrinsic parameters such as the specific surface area is very important to improve the energy conversion efficiency of TiO 2-based solar cells.",

author = "Jung, {Hyun Suk} and Lee, {Jung Kun} and Michael Nastasi and Lee, {Sang Wook} and Kim, {Jin Young} and Park, {Jong Sung} and Hong, {Kug Sun} and Hyunho Shin",

year = "2005",

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doi = "10.1021/la051807d",

language = "English",

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T1 - Preparation of nanoporous MgO-coated TiO 2 nanoparticles and their application to the electrode of dye-sensitized solar cells

AU - Jung, Hyun Suk

AU - Lee, Jung Kun

AU - Nastasi, Michael

AU - Lee, Sang Wook

AU - Kim, Jin Young

AU - Park, Jong Sung

AU - Hong, Kug Sun

AU - Shin, Hyunho

PY - 2005/11/8

Y1 - 2005/11/8

N2 - Sol-gel-derived Mg(OH) 2 gel was coated onto TiO 2 nanoparticles, and the subsequent thermal topotactic decomposition of the gel formed a highly nanoporous MgO crystalline coating. The specific surface area of the electrode that was prepared from the core-shell-structured TiO 2 nanoparticles significantly increased compared with that of the uncoated TiO 2 electrode. The increase in the specific surface area of the MgO-coated TiO 2 electrode was attributed to the highly nanoporous MgO coating layer that resulted from the topotactic reaction. Dye adsorption behavior and solar cell performance were significantly enhanced by employing the MgO-coated TiO 2 electrode. Optimized coating of a MgO layer on TiO 2 nanoparticles enhanced the energy conversion efficiency as much as 45% compared to that of the uncoated TiO 2 electrode. This indicates that controlling the extrinsic parameters such as the specific surface area is very important to improve the energy conversion efficiency of TiO 2-based solar cells.

AB - Sol-gel-derived Mg(OH) 2 gel was coated onto TiO 2 nanoparticles, and the subsequent thermal topotactic decomposition of the gel formed a highly nanoporous MgO crystalline coating. The specific surface area of the electrode that was prepared from the core-shell-structured TiO 2 nanoparticles significantly increased compared with that of the uncoated TiO 2 electrode. The increase in the specific surface area of the MgO-coated TiO 2 electrode was attributed to the highly nanoporous MgO coating layer that resulted from the topotactic reaction. Dye adsorption behavior and solar cell performance were significantly enhanced by employing the MgO-coated TiO 2 electrode. Optimized coating of a MgO layer on TiO 2 nanoparticles enhanced the energy conversion efficiency as much as 45% compared to that of the uncoated TiO 2 electrode. This indicates that controlling the extrinsic parameters such as the specific surface area is very important to improve the energy conversion efficiency of TiO 2-based solar cells.

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Preparation of nanoporous MgO-coated TiO ₂ nanoparticles and their application to the electrode of dye-sensitized solar cells

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