Domain Wall Conduction in Calcium-Modified Lead Titanate for Polarization Tunable Photovoltaic Devices

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Chong-Xin Qian
  • Hong-Jian Feng
  • Qiang Zhang
  • Jiawei He
  • Zi-Xuan Chen
  • Ming-Zi Wang

Detail(s)

Original languageEnglish
Article number100043
Journal / PublicationCell Reports Physical Science
Volume1
Issue number4
Online published15 Apr 2020
Publication statusPublished - 22 Apr 2020
Externally publishedYes

Link(s)

Abstract

Ferroelectric domain wall (DW) conduction, confirmed in recent experiments, has attracted intense attention due to its promising applications in optoelectronic devices. Herein, we provide theoretical evidence of electric conduction in Pb0.8Ca0.2TiO3 (PCT) DWs. The separation of charge accumulation in DWs, corresponding to the electronic conduction-band minimum (CBM) and valence-band maximum (VBM), weakens the tendency for the electron-hole recombination, thereby providing more efficient channels for charge transfer. We fabricate PCT-based functional photovoltaic devices with polarization tunable charge transfer to exploit the combined conduction and ferroelectric properties of the DW. The photovoltaic performance of the devices can be regulated by the alternation of ferroelectric domains in PCT, caused by variation of the external poling. Our work broadens the applicability of DW conduction and may inspire the future design of high-performance materials in photovoltaic devices.

Research Area(s)

  • charge transfer, density functional theory, domain walls conduction, ferroelectric polarization, photovoltaic devices

Citation Format(s)

Domain Wall Conduction in Calcium-Modified Lead Titanate for Polarization Tunable Photovoltaic Devices. / Qian, Chong-Xin; Feng, Hong-Jian; Zhang, Qiang; He, Jiawei; Chen, Zi-Xuan; Wang, Ming-Zi; Zeng, Xiao Cheng.

In: Cell Reports Physical Science, Vol. 1, No. 4, 100043, 22.04.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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