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Electrochemically deposited SnO2–TiO2 compact layers for enhanced carrier transport and defect passivation in dye-sensitized solar cells.

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Title: Electrochemically deposited SnO2–TiO2 compact layers for enhanced carrier transport and defect passivation in dye-sensitized solar cells.
Authors: Ho, Ying-Rong1 (AUTHOR), Chen, Chao-Nan1 (AUTHOR), Chen, Jian-Zhi2 (AUTHOR), Huang, Jung-Jie1 (AUTHOR) jjhuang@asia.edu.tw
Source: Materials Science & Engineering: B. Jun2026, Vol. 328, pN.PAG-N.PAG. 1p.
Subjects: Dye-sensitized solar cells, Electron transport, Surface passivation, Charge carrier lifetime, Thin film deposition, Photovoltaic power generation
Abstract: This study presents the fabrication of SnO 2 –TiO 2 compact layers (CLs) by electrochemical deposition (ECD) to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). Incorporating Sn into TiO₂ CLs significantly improved carrier transport and effectively passivated intrinsic TiO₂ defects. X-ray photoelectron spectroscopy revealed that SnO₂ doping suppressed Ti3+/Ti2+ states and increased the proportion of stable Ti4+, while high-resolution TEM confirmed the conformal growth of uniform composite films. The optimized SnO₂–TiO₂ CL reduced charge transport time from 16.46 ms to 3.45 ms, extended electron lifetime as verified by open-circuit voltage decay analysis, and improved device efficiency from 4.19% to 6.13%. Electrochemical impedance spectroscopy further demonstrated reduced interfacial resistance and enhanced electron collection. These results indicate that ECD-fabricated SnO₂–TiO₂ CLs simultaneously offer high conductivity and defect passivation, providing a cost-effective and scalable strategy for advancing DSSC performance and other optoelectronic semiconductor devices. • SnO 2 –TiO 2 compact layer by electrochemical deposition for DSSC device • SnO₂–TiO₂ layer can improved charge transport time and electron lifetime of device • The device efficiency improved from 4.19% to 6.13% after added SnO₂–TiO₂ layer • Electrochemically deposited SnO 2 –TiO 2 is suitable for improving the DSSC performance. [ABSTRACT FROM AUTHOR]
Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192437196
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Electrochemically deposited SnO2–TiO2 compact layers for enhanced carrier transport and defect passivation in dye-sensitized solar cells.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Ho%2C+Ying-Rong%22">Ho, Ying-Rong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Chao-Nan%22">Chen, Chao-Nan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Jian-Zhi%22">Chen, Jian-Zhi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Jung-Jie%22">Huang, Jung-Jie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jjhuang@asia.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+B%22">Materials Science & Engineering: B</searchLink>. Jun2026, Vol. 328, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Dye-sensitized+solar+cells%22">Dye-sensitized solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+transport%22">Electron transport</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+passivation%22">Surface passivation</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+carrier+lifetime%22">Charge carrier lifetime</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+film+deposition%22">Thin film deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+generation%22">Photovoltaic power generation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study presents the fabrication of SnO 2 –TiO 2 compact layers (CLs) by electrochemical deposition (ECD) to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). Incorporating Sn into TiO₂ CLs significantly improved carrier transport and effectively passivated intrinsic TiO₂ defects. X-ray photoelectron spectroscopy revealed that SnO₂ doping suppressed Ti3+/Ti2+ states and increased the proportion of stable Ti4+, while high-resolution TEM confirmed the conformal growth of uniform composite films. The optimized SnO₂–TiO₂ CL reduced charge transport time from 16.46 ms to 3.45 ms, extended electron lifetime as verified by open-circuit voltage decay analysis, and improved device efficiency from 4.19% to 6.13%. Electrochemical impedance spectroscopy further demonstrated reduced interfacial resistance and enhanced electron collection. These results indicate that ECD-fabricated SnO₂–TiO₂ CLs simultaneously offer high conductivity and defect passivation, providing a cost-effective and scalable strategy for advancing DSSC performance and other optoelectronic semiconductor devices. • SnO 2 –TiO 2 compact layer by electrochemical deposition for DSSC device • SnO₂–TiO₂ layer can improved charge transport time and electron lifetime of device • The device efficiency improved from 4.19% to 6.13% after added SnO₂–TiO₂ layer • Electrochemically deposited SnO 2 –TiO 2 is suitable for improving the DSSC performance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.mseb.2026.119357
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Dye-sensitized solar cells
        Type: general
      – SubjectFull: Electron transport
        Type: general
      – SubjectFull: Surface passivation
        Type: general
      – SubjectFull: Charge carrier lifetime
        Type: general
      – SubjectFull: Thin film deposition
        Type: general
      – SubjectFull: Photovoltaic power generation
        Type: general
    Titles:
      – TitleFull: Electrochemically deposited SnO2–TiO2 compact layers for enhanced carrier transport and defect passivation in dye-sensitized solar cells.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Ho, Ying-Rong
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            NameFull: Chen, Chao-Nan
      – PersonEntity:
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            NameFull: Chen, Jian-Zhi
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            NameFull: Huang, Jung-Jie
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 328
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            – TitleFull: Materials Science & Engineering: B
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