Journal article
Ferroelectric, Optical, and Photovoltaic Properties of Morphotropic Phase Boundary Compositions in the PbTiO3-BiFeO3-Bi(Ni1/2Ti1/2)O-3 System
Chemistry of materials, v 31(11), pp 4184-4194
11 Jun 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Ferroelectrics can exhibit the bulk photovoltaic effect (BPVE), which enables a switchable photoresponse and above-band-gap open-circuit voltages (V-oc). For these systems a large remnant polarization (P-r) combined with a narrow band gap (E-g) is believed to be critical in optimizing the photovoltaic performance. Here we investigate the PbTiO3-BiFeO3-Bi(Ni1/2Ti1/2)O-3 system which exhibits a large bulk P-r and a tunable narrow E-g. To optimize the ferroelectric polarization, ceramic samples were prepared in the vicinity of the ternary morphotropic phase boundary (MPB), and their photovoltaic properties were characterized over a broad range of optical wavelengths. MPB compositions with a direct optical gap ranging from 2.25 to 2.85 eV and P-r = 32-39 mu C/cm(2) show a BPVE with V-oc = 6 V at room temperature and a wavelength-dependent switchable photoresponse. Under 1 sun AM 1.5 G illumination the short-circuit photocurrent (j(sc)) increased by an order of magnitude as E-g was lowered from 2.85 to 2.25 eV, with, similar to 0.1 mu A/cm(2).
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Details
- Title
- Ferroelectric, Optical, and Photovoltaic Properties of Morphotropic Phase Boundary Compositions in the PbTiO3-BiFeO3-Bi(Ni1/2Ti1/2)O-3 System
- Creators
- Liyan Wu - University of PennsylvaniaAdrian Podpirka - Drexel UniversityJonathan E. Spanier - Drexel UniversityPeter K. Davies - University of Pennsylvania
- Publication Details
- Chemistry of materials, v 31(11), pp 4184-4194
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 11
- Grant note
- DE-SC0014664 / ORISE Program of the U.S. Department of Energy CBET 1705440 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000471728200036
- Scopus ID
- 2-s2.0-85067090862
- Other Identifier
- 991019168048904721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary