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

被引：26

作者：

Feng, Keyuan ^{[1
,2
]}

Liu, Xiaoyan ^{[2
]}

Si, Donghui ^{[1
,2
]}

Tang, Xiao ^{[2
]}

Xing, An ^{[2
]}

Osada, Minoru ^{[3
]}

Xiao, Peng ^{[1
]}

机构：

[1] Chongqing Univ, Coll Phys, Chongqing 400030, Peoples R China

[2] Chongqing Univ Sci & Technol, Coll Met & Mat Engn, Chongqing Key Lab Nano Micro Composites & Devices, Chongqing 401331, Peoples R China

[3] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF POWER SOURCES | 2017年 / 350卷

基金：

中国国家自然科学基金;

关键词：

Ferroelectric dipole induced electric field; Charge recombination; Electron mobility; Dye-sensitized solar cells; HIGH-EFFICIENCY; FILMS; PERFORMANCE; CONVERSION; NANOTUBE; LAYER; ELECTRODES; TRANSPORT; POWDERS; ZNO;

D O I：

10.1016/j.jpowsour.2017.03.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

BaTiO3/TiO2 nanocomposite films with varied amount of BaTiO3 are fabricated and applied as photo anodes 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 degrees 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 (<= 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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：35 / 40

页数：6

共 37 条

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