Preparation of a nanoporous CaCO 3-coated TiO 2 electrode and its application to a dye-sensitized solar cell

Sangwook Lee; Jin Young Kim; Sung Hun Youn; Min Park; Kug Sun Hong; Hyun Suk Jung; Jung Kun Lee; Hyunho Shin

doi:10.1021/la701826v

Preparation of a nanoporous CaCO ₃-coated TiO ₂ electrode and its application to a dye-sensitized solar cell

Sangwook Lee, Jin Young Kim, Sung Hun Youn, Min Park, Kug Sun Hong, Hyun Suk Jung, Jung Kun Lee, Hyunho Shin

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

63 Scopus citations

Abstract

A nanoporous CaCO ₃ overlayer-coated TiO ₂ thick film was prepared by the topotactic thermal decomposition of Ca(OH) ₂, and its performance as an electrode of a dye-sensitized solar cell was investigated. As compared to bare TiO ₂, nanoporous CaCO ₃-coated TiO ₂ provided higher specific surface area and, subsequently, a larger amount of dye adsorption; this in turn increased short-circuit current (J _sc). Furthermore, the CaCO ₃ coating demonstrated increased impedance at the TiO ₂/dye/electrolyte interface and increased the lifetime of the photoelectrons, indicating the improved retardation of the back electron transfer, which increases J _sc, open-circuit voltage (V _oc), and fill factor (ff). Thereby, the energy conversion efficiency (η) of the solar cell improved from 7.8 to 9.7% (an improvement of 24.4%) as the nanoporous CaCO ₃ layer was coated onto TiO ₂ thick films.

Original language	English
Pages (from-to)	11907-11910
Number of pages	4
Journal	Langmuir
Volume	23
Issue number	23
DOIs	https://doi.org/10.1021/la701826v
State	Published - 6 Nov 2007

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title = "Preparation of a nanoporous CaCO 3-coated TiO 2 electrode and its application to a dye-sensitized solar cell",

abstract = "A nanoporous CaCO 3 overlayer-coated TiO 2 thick film was prepared by the topotactic thermal decomposition of Ca(OH) 2, and its performance as an electrode of a dye-sensitized solar cell was investigated. As compared to bare TiO 2, nanoporous CaCO 3-coated TiO 2 provided higher specific surface area and, subsequently, a larger amount of dye adsorption; this in turn increased short-circuit current (J sc). Furthermore, the CaCO 3 coating demonstrated increased impedance at the TiO 2/dye/electrolyte interface and increased the lifetime of the photoelectrons, indicating the improved retardation of the back electron transfer, which increases J sc, open-circuit voltage (V oc), and fill factor (ff). Thereby, the energy conversion efficiency (η) of the solar cell improved from 7.8 to 9.7% (an improvement of 24.4%) as the nanoporous CaCO 3 layer was coated onto TiO 2 thick films.",

author = "Sangwook Lee and Kim, {Jin Young} and Youn, {Sung Hun} and Min Park and Hong, {Kug Sun} and Jung, {Hyun Suk} and Lee, {Jung Kun} and Hyunho Shin",

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T1 - Preparation of a nanoporous CaCO 3-coated TiO 2 electrode and its application to a dye-sensitized solar cell

AU - Lee, Sangwook

AU - Kim, Jin Young

AU - Youn, Sung Hun

AU - Park, Min

AU - Hong, Kug Sun

AU - Jung, Hyun Suk

AU - Lee, Jung Kun

AU - Shin, Hyunho

PY - 2007/11/6

Y1 - 2007/11/6

N2 - A nanoporous CaCO 3 overlayer-coated TiO 2 thick film was prepared by the topotactic thermal decomposition of Ca(OH) 2, and its performance as an electrode of a dye-sensitized solar cell was investigated. As compared to bare TiO 2, nanoporous CaCO 3-coated TiO 2 provided higher specific surface area and, subsequently, a larger amount of dye adsorption; this in turn increased short-circuit current (J sc). Furthermore, the CaCO 3 coating demonstrated increased impedance at the TiO 2/dye/electrolyte interface and increased the lifetime of the photoelectrons, indicating the improved retardation of the back electron transfer, which increases J sc, open-circuit voltage (V oc), and fill factor (ff). Thereby, the energy conversion efficiency (η) of the solar cell improved from 7.8 to 9.7% (an improvement of 24.4%) as the nanoporous CaCO 3 layer was coated onto TiO 2 thick films.

AB - A nanoporous CaCO 3 overlayer-coated TiO 2 thick film was prepared by the topotactic thermal decomposition of Ca(OH) 2, and its performance as an electrode of a dye-sensitized solar cell was investigated. As compared to bare TiO 2, nanoporous CaCO 3-coated TiO 2 provided higher specific surface area and, subsequently, a larger amount of dye adsorption; this in turn increased short-circuit current (J sc). Furthermore, the CaCO 3 coating demonstrated increased impedance at the TiO 2/dye/electrolyte interface and increased the lifetime of the photoelectrons, indicating the improved retardation of the back electron transfer, which increases J sc, open-circuit voltage (V oc), and fill factor (ff). Thereby, the energy conversion efficiency (η) of the solar cell improved from 7.8 to 9.7% (an improvement of 24.4%) as the nanoporous CaCO 3 layer was coated onto TiO 2 thick films.

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Preparation of a nanoporous CaCO ₃-coated TiO ₂ electrode and its application to a dye-sensitized solar cell

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