Journal article
Polarization-Modulated Photovoltaic Effect at the Morphotropic Phase Boundary in Ferroelectric Ceramics
Advanced electronic materials, v 7(5), pp 2100144-n/a
01 May 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Ferroelectric materials, which exhibit switchable polarization, are potential candidates for photovoltaic applications owing to their intriguing charge carrier separation mechanism associated with polarization and breaking of inversion symmetry. To overcome the low photocurrent of ferroelectrics, extensive efforts have focused on reducing their bandgaps to increase the optical absorption of the solar spectrum and thus the power conversion efficiency. Here, a new avenue of enhancing photovoltaic performance via engineering the polarization across a morphotropic phase boundary (MPB) is reported. Tetragonal compositions in the vicinity of the MPB in a PbTiO3-Bi(Ni1/2Ti1/2)O-3 solid solution are shown to generate up to 3.6 kV cm(-1) photoinduced electric field and 6.2 mu A cm(-2) short-circuit photocurrent, multiple times higher than its pseudocubic counterpart under the same illumination conditions with excellent polarization retention. This enhancement allows the investigation of the correlation between the polarization switching and photovoltaic switching, which enables a controllable multistate photocurrent. Combined with a bandgap of 2.2 eV, this material exhibits a sizable photoresponse over a broad spectral range. These findings provide a new approach to improve the photovoltaic performance of ferroelectric materials and can expand their potential applications in optoelectronic devices.
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Details
- Title
- Polarization-Modulated Photovoltaic Effect at the Morphotropic Phase Boundary in Ferroelectric Ceramics
- Creators
- Liyan Wu - University of PennsylvaniaAaron M. Burger - Drexel UniversityAndrew L. Bennett-Jackson - Drexel UniversityJonathan E. Spanier - Drexel UniversityPeter K. Davies - University of Pennsylvania
- Publication Details
- Advanced electronic materials, v 7(5), pp 2100144-n/a
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- CBET 1705440 / NSF; National Science Foundation (NSF) NNCI-202506 / NSF Nanotechnology Coordinated Infrastructure Program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000640664400001
- Scopus ID
- 2-s2.0-85104339532
- Other Identifier
- 991019168804804721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied