Low temperature growth of hybrid ZnO/TiO2 nano-sculptured foxtail-structures for dye-sensitized solar cells

Chao Zhao, David Child, Yue Hu, Neil Robertson, Desmond Gibson, Shun Cai Wang, Yong Qing Fu

Research output: Contribution to journalArticle

Abstract

ZnO/TiO2 nano-sculptured foxtail-structures were fabricated using two sequential low-temperature processes combining hydrothermal growth of ZnO nanorods (NRs) and plasma ion assisted evaporation of crystalline TiO2 nanostructures. The ZnO NRs were homogeneously covered with a thin layer of anatase TiO2 nanostructure to form nano-sculptured foxtail-like patterns. Power conversion efficiency of dye-sensitized solar cells made from these hybrid ZnO/TiO2 structures was improved from 0.3% to 1.8% after using the ZnO/TiO2 hybrid structure. Measurement using electrochemical impedance spectroscopy and photocurrent decay proved that the hybrid structures have good electron transport capability, because the ZnO NRs can provide a direct pathway for charge transport; the TiO2 layer can improve charge injection and prevent the formation of Zn2+/dye complex (thus reducing the recombination); the hybrid structures can further increase surface area (thus higher dye loading).
Original languageEnglish
Pages (from-to)61153-61159
JournalRSC ADVANCES
Volume4
Issue number105
DOIs
Publication statusPublished - 6 Nov 2014

Cite this

Zhao, Chao ; Child, David ; Hu, Yue ; Robertson, Neil ; Gibson, Desmond ; Wang, Shun Cai ; Fu, Yong Qing. / Low temperature growth of hybrid ZnO/TiO2 nano-sculptured foxtail-structures for dye-sensitized solar cells. In: RSC ADVANCES. 2014 ; Vol. 4, No. 105. pp. 61153-61159.
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title = "Low temperature growth of hybrid ZnO/TiO2 nano-sculptured foxtail-structures for dye-sensitized solar cells",
abstract = "ZnO/TiO2 nano-sculptured foxtail-structures were fabricated using two sequential low-temperature processes combining hydrothermal growth of ZnO nanorods (NRs) and plasma ion assisted evaporation of crystalline TiO2 nanostructures. The ZnO NRs were homogeneously covered with a thin layer of anatase TiO2 nanostructure to form nano-sculptured foxtail-like patterns. Power conversion efficiency of dye-sensitized solar cells made from these hybrid ZnO/TiO2 structures was improved from 0.3{\%} to 1.8{\%} after using the ZnO/TiO2 hybrid structure. Measurement using electrochemical impedance spectroscopy and photocurrent decay proved that the hybrid structures have good electron transport capability, because the ZnO NRs can provide a direct pathway for charge transport; the TiO2 layer can improve charge injection and prevent the formation of Zn2+/dye complex (thus reducing the recombination); the hybrid structures can further increase surface area (thus higher dye loading).",
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Low temperature growth of hybrid ZnO/TiO2 nano-sculptured foxtail-structures for dye-sensitized solar cells. / Zhao, Chao; Child, David; Hu, Yue; Robertson, Neil; Gibson, Desmond; Wang, Shun Cai; Fu, Yong Qing.

In: RSC ADVANCES, Vol. 4, No. 105, 06.11.2014, p. 61153-61159.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Zhao, Chao

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AU - Fu, Yong Qing

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AB - ZnO/TiO2 nano-sculptured foxtail-structures were fabricated using two sequential low-temperature processes combining hydrothermal growth of ZnO nanorods (NRs) and plasma ion assisted evaporation of crystalline TiO2 nanostructures. The ZnO NRs were homogeneously covered with a thin layer of anatase TiO2 nanostructure to form nano-sculptured foxtail-like patterns. Power conversion efficiency of dye-sensitized solar cells made from these hybrid ZnO/TiO2 structures was improved from 0.3% to 1.8% after using the ZnO/TiO2 hybrid structure. Measurement using electrochemical impedance spectroscopy and photocurrent decay proved that the hybrid structures have good electron transport capability, because the ZnO NRs can provide a direct pathway for charge transport; the TiO2 layer can improve charge injection and prevent the formation of Zn2+/dye complex (thus reducing the recombination); the hybrid structures can further increase surface area (thus higher dye loading).

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