The composition and poling-dependent photovoltaic studies in ferroelectric (Bi1−xSr x)(Fe1−xTi x)O3 thin films

P. P. Biswas, Ch Thirmal, S. Pal, M. Miryala, M. Murakami, P. Murugavel

Research output: Contribution to journalArticle

Abstract

The polycrystalline (Bi1−xSrx)(Fe1−xTix)O3 (x = 0.0, 0.05, 0.10, and 0.20) thin films were grown on Pt(111)/TiO2/SiO2/Si(100) substrates using chemical solution deposition technique. X-ray diffraction pattern revealed that pure BiFeO3 film is crystallized in rhombohedrally distorted crystal structure. However, the patterns for doped samples displayed a mixed-phase (rhombohedral + tetragonal) structure. The Raman studies revealed the emergence of B mode related to the tetragonal phase along with the modes corresponding to the rhombohedral phase in doped systems. The photovoltaic studies displayed a large photovoltaic response for the parent compound with an open-circuit voltage of 0.47 V. However, it showed a decrease in the photovoltaic response with an increase in composition x. The composition-dependent photovoltaic response could be correlated to the evolution of tetragonal phase fractions and the polarization. Additionally, the poling-dependent photovoltaic studies revealed the dominant role played by the polarization in comparison with the interface Schottky effect. This work gives an improved understanding of the ferroelectric photovoltaic mechanism and, therefore, may offer guidelines to design and optimize photovoltaic materials.

Original languageEnglish
JournalJournal of Materials Science: Materials in Electronics
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

Ferroelectric materials
Polarization
Thin films
Open circuit voltage
thin films
Chemical analysis
Diffraction patterns
Crystal structure
polarization
open circuit voltage
X ray diffraction
Substrates
diffraction patterns
crystal structure
x rays
TiO2-SiO2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "The composition and poling-dependent photovoltaic studies in ferroelectric (Bi1−xSr x)(Fe1−xTi x)O3 thin films",
abstract = "The polycrystalline (Bi1−xSrx)(Fe1−xTix)O3 (x = 0.0, 0.05, 0.10, and 0.20) thin films were grown on Pt(111)/TiO2/SiO2/Si(100) substrates using chemical solution deposition technique. X-ray diffraction pattern revealed that pure BiFeO3 film is crystallized in rhombohedrally distorted crystal structure. However, the patterns for doped samples displayed a mixed-phase (rhombohedral + tetragonal) structure. The Raman studies revealed the emergence of B mode related to the tetragonal phase along with the modes corresponding to the rhombohedral phase in doped systems. The photovoltaic studies displayed a large photovoltaic response for the parent compound with an open-circuit voltage of 0.47 V. However, it showed a decrease in the photovoltaic response with an increase in composition x. The composition-dependent photovoltaic response could be correlated to the evolution of tetragonal phase fractions and the polarization. Additionally, the poling-dependent photovoltaic studies revealed the dominant role played by the polarization in comparison with the interface Schottky effect. This work gives an improved understanding of the ferroelectric photovoltaic mechanism and, therefore, may offer guidelines to design and optimize photovoltaic materials.",
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AU - Thirmal, Ch

AU - Pal, S.

AU - Miryala, M.

AU - Murakami, M.

AU - Murugavel, P.

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