Ferroelectric BaTiO3 dipole induced charge transfer enhancement in dye-sensitized solar cells

Keyuan Feng; Xiaoyan Liu; Donghui Si; Xiao Tang; An Xing; Minoru Osada; Peng Xiao

doi:10.1016/j.jpowsour.2017.03.049

Ferroelectric BaTiO₃ dipole induced charge transfer enhancement in dye-sensitized solar cells

Keyuan Feng, Xiaoyan Liu^*, Donghui Si, Xiao Tang, An Xing, Minoru Osada, Peng Xiao

^*Corresponding author for this work

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

20 Citations (Scopus)

Abstract

BaTiO₃/TiO₂ nanocomposite films with varied amount of BaTiO₃ are fabricated and applied as photoanodes for dye-sensitized solar cells (DSCs) and demonstrated enhanced power conversion efficiency. Ferroelectricity of BaTiO₃ in the film after subjected to a annealing process up to 450 °C is examined by Switching Spectroscopy Piezoresponse Force Microscopy (SSPFM). The highest performance is achieved in 1.0 wt% BaTiO₃ addition as a result of increased photocurrent density (J_sc) and fill factor (FF), regardless of reduction of dye-loading. Electrochemical impedance spectroscopy (EIS) measurements at different bias voltages (≦V_oc) in dark suggest that ferroelectric dipole induced electric field has positive effects on enhancing electron mobility and suppressing charge recombination. Although more detailed experiments are needed in designing of the nanocomposite films for compensating characteristics of dye-loading and electron mobility, introduction of ferroelectric dipole induced electric field into the photoanode would be a good strategy in achieving further improvement of power conversion efficiency of DSCs through improved charge transfer properties.

Original language	English
Pages (from-to)	35-40
Number of pages	6
Journal	Journal of Power Sources
Volume	350
DOIs	https://doi.org/10.1016/j.jpowsour.2017.03.049
Publication status	Published - 2017 May 15
Externally published	Yes

Keywords

Charge recombination
Dye-sensitized solar cells
Electron mobility
Ferroelectric dipole induced electric field

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2017.03.049

Cite this

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title = "Ferroelectric BaTiO3 dipole induced charge transfer enhancement in dye-sensitized solar cells",

abstract = "BaTiO3/TiO2 nanocomposite films with varied amount of BaTiO3 are fabricated and applied as photoanodes for dye-sensitized solar cells (DSCs) and demonstrated enhanced power conversion efficiency. Ferroelectricity of BaTiO3 in the film after subjected to a annealing process up to 450 °C is examined by Switching Spectroscopy Piezoresponse Force Microscopy (SSPFM). The highest performance is achieved in 1.0 wt% BaTiO3 addition as a result of increased photocurrent density (Jsc) and fill factor (FF), regardless of reduction of dye-loading. Electrochemical impedance spectroscopy (EIS) measurements at different bias voltages (≦Voc) in dark suggest that ferroelectric dipole induced electric field has positive effects on enhancing electron mobility and suppressing charge recombination. Although more detailed experiments are needed in designing of the nanocomposite films for compensating characteristics of dye-loading and electron mobility, introduction of ferroelectric dipole induced electric field into the photoanode would be a good strategy in achieving further improvement of power conversion efficiency of DSCs through improved charge transfer properties.",

keywords = "Charge recombination, Dye-sensitized solar cells, Electron mobility, Ferroelectric dipole induced electric field",

author = "Keyuan Feng and Xiaoyan Liu and Donghui Si and Xiao Tang and An Xing and Minoru Osada and Peng Xiao",

year = "2017",

month = may,

day = "15",

doi = "10.1016/j.jpowsour.2017.03.049",

language = "English",

volume = "350",

pages = "35--40",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Ferroelectric BaTiO3 dipole induced charge transfer enhancement in dye-sensitized solar cells

AU - Feng, Keyuan

AU - Liu, Xiaoyan

AU - Si, Donghui

AU - Tang, Xiao

AU - Xing, An

AU - Osada, Minoru

AU - Xiao, Peng

PY - 2017/5/15

Y1 - 2017/5/15

N2 - BaTiO3/TiO2 nanocomposite films with varied amount of BaTiO3 are fabricated and applied as photoanodes for dye-sensitized solar cells (DSCs) and demonstrated enhanced power conversion efficiency. Ferroelectricity of BaTiO3 in the film after subjected to a annealing process up to 450 °C is examined by Switching Spectroscopy Piezoresponse Force Microscopy (SSPFM). The highest performance is achieved in 1.0 wt% BaTiO3 addition as a result of increased photocurrent density (Jsc) and fill factor (FF), regardless of reduction of dye-loading. Electrochemical impedance spectroscopy (EIS) measurements at different bias voltages (≦Voc) in dark suggest that ferroelectric dipole induced electric field has positive effects on enhancing electron mobility and suppressing charge recombination. Although more detailed experiments are needed in designing of the nanocomposite films for compensating characteristics of dye-loading and electron mobility, introduction of ferroelectric dipole induced electric field into the photoanode would be a good strategy in achieving further improvement of power conversion efficiency of DSCs through improved charge transfer properties.

AB - BaTiO3/TiO2 nanocomposite films with varied amount of BaTiO3 are fabricated and applied as photoanodes for dye-sensitized solar cells (DSCs) and demonstrated enhanced power conversion efficiency. Ferroelectricity of BaTiO3 in the film after subjected to a annealing process up to 450 °C is examined by Switching Spectroscopy Piezoresponse Force Microscopy (SSPFM). The highest performance is achieved in 1.0 wt% BaTiO3 addition as a result of increased photocurrent density (Jsc) and fill factor (FF), regardless of reduction of dye-loading. Electrochemical impedance spectroscopy (EIS) measurements at different bias voltages (≦Voc) in dark suggest that ferroelectric dipole induced electric field has positive effects on enhancing electron mobility and suppressing charge recombination. Although more detailed experiments are needed in designing of the nanocomposite films for compensating characteristics of dye-loading and electron mobility, introduction of ferroelectric dipole induced electric field into the photoanode would be a good strategy in achieving further improvement of power conversion efficiency of DSCs through improved charge transfer properties.

KW - Charge recombination

KW - Dye-sensitized solar cells

KW - Electron mobility

KW - Ferroelectric dipole induced electric field

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