A newly designed Nb-doped TiO2/Al-doped ZnO transparent conducting oxide multilayer for electrochemical photoenergy conversion devices

Jun Hong Noh; Hyun Soo Han; Sangwook Lee; Dong Hoe Kim; Jong Hun Park; Sangbaek Park; Jin Young Kim; Hyun Suk Jung; Kug Sun Hong

doi:10.1021/jp104247t

A newly designed Nb-doped TiO₂/Al-doped ZnO transparent conducting oxide multilayer for electrochemical photoenergy conversion devices

Jun Hong Noh, Hyun Soo Han, Sangwook Lee, Dong Hoe Kim, Jong Hun Park, Sangbaek Park, Jin Young Kim, Hyun Suk Jung, Kug Sun Hong

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

27 Scopus citations

Abstract

We present dye-sensitized solar cells (DSSCs) employing a thermally and chemically stable Nb-doped TiO₂ (NTO)/Al-doped ZnO (AZO) multilayer transparent conducting oxide (TCO) thin film. The NTO overlayer was found to block oxygen diffusion into AZO during the air-annealing process for the fabrication process of the DSSCs, thereby exhibiting good thermal stability in electrical conductivity of the multilayer TCO. Moreover, the NTO overlayer suppressed the formation of Zn²⁺-dye aggregates at the surface of the AZO. The DSSC employing this multilayer TCO showed a photon to electron conversion efficiency of 3.8% compared to 1.9% for the cell employing the AZO single layer. The optical transmittance and charge transport properties that were measured using electrochemical impedance spectroscopy demonstrate that NTO/AZO is a promising TCO for large scale DSSCs.

Original language	English
Pages (from-to)	13867-13871
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	32
DOIs	https://doi.org/10.1021/jp104247t
State	Published - 19 Aug 2010

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title = "A newly designed Nb-doped TiO2/Al-doped ZnO transparent conducting oxide multilayer for electrochemical photoenergy conversion devices",

abstract = "We present dye-sensitized solar cells (DSSCs) employing a thermally and chemically stable Nb-doped TiO2 (NTO)/Al-doped ZnO (AZO) multilayer transparent conducting oxide (TCO) thin film. The NTO overlayer was found to block oxygen diffusion into AZO during the air-annealing process for the fabrication process of the DSSCs, thereby exhibiting good thermal stability in electrical conductivity of the multilayer TCO. Moreover, the NTO overlayer suppressed the formation of Zn2+-dye aggregates at the surface of the AZO. The DSSC employing this multilayer TCO showed a photon to electron conversion efficiency of 3.8% compared to 1.9% for the cell employing the AZO single layer. The optical transmittance and charge transport properties that were measured using electrochemical impedance spectroscopy demonstrate that NTO/AZO is a promising TCO for large scale DSSCs.",

author = "Noh, {Jun Hong} and Han, {Hyun Soo} and Sangwook Lee and Kim, {Dong Hoe} and Park, {Jong Hun} and Sangbaek Park and Kim, {Jin Young} and Jung, {Hyun Suk} and Hong, {Kug Sun}",

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doi = "10.1021/jp104247t",

language = "English",

volume = "114",

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T1 - A newly designed Nb-doped TiO2/Al-doped ZnO transparent conducting oxide multilayer for electrochemical photoenergy conversion devices

AU - Noh, Jun Hong

AU - Han, Hyun Soo

AU - Lee, Sangwook

AU - Kim, Dong Hoe

AU - Park, Jong Hun

AU - Park, Sangbaek

AU - Kim, Jin Young

AU - Jung, Hyun Suk

AU - Hong, Kug Sun

PY - 2010/8/19

Y1 - 2010/8/19

N2 - We present dye-sensitized solar cells (DSSCs) employing a thermally and chemically stable Nb-doped TiO2 (NTO)/Al-doped ZnO (AZO) multilayer transparent conducting oxide (TCO) thin film. The NTO overlayer was found to block oxygen diffusion into AZO during the air-annealing process for the fabrication process of the DSSCs, thereby exhibiting good thermal stability in electrical conductivity of the multilayer TCO. Moreover, the NTO overlayer suppressed the formation of Zn2+-dye aggregates at the surface of the AZO. The DSSC employing this multilayer TCO showed a photon to electron conversion efficiency of 3.8% compared to 1.9% for the cell employing the AZO single layer. The optical transmittance and charge transport properties that were measured using electrochemical impedance spectroscopy demonstrate that NTO/AZO is a promising TCO for large scale DSSCs.

AB - We present dye-sensitized solar cells (DSSCs) employing a thermally and chemically stable Nb-doped TiO2 (NTO)/Al-doped ZnO (AZO) multilayer transparent conducting oxide (TCO) thin film. The NTO overlayer was found to block oxygen diffusion into AZO during the air-annealing process for the fabrication process of the DSSCs, thereby exhibiting good thermal stability in electrical conductivity of the multilayer TCO. Moreover, the NTO overlayer suppressed the formation of Zn2+-dye aggregates at the surface of the AZO. The DSSC employing this multilayer TCO showed a photon to electron conversion efficiency of 3.8% compared to 1.9% for the cell employing the AZO single layer. The optical transmittance and charge transport properties that were measured using electrochemical impedance spectroscopy demonstrate that NTO/AZO is a promising TCO for large scale DSSCs.

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U2 - 10.1021/jp104247t

DO - 10.1021/jp104247t

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 32

ER -

A newly designed Nb-doped TiO₂/Al-doped ZnO transparent conducting oxide multilayer for electrochemical photoenergy conversion devices

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