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Bhatnagar, A.; Roy Chaudhuri, Ayan; Heon, Kim Y.; Hesse, D.; Alexe, M.: Role of domain walls in the abnormal photovoltaic effect in BiFeO 3 . In: Nature Communications 4 (2013), 2835. DOI: http://dx.doi.org/10.1038/ncomms3835
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Sum total of downloads: 195
| Abstract: | |
Recently, the anomalous photovoltaic (PV) effect in BiFeO 3 (BFO) thin films, which resulted in open circuit voltages (V oc) considerably larger than the band gap of the material, has generated a revival of the entire field of photoferroelectrics. Here, via temperature-dependent PV studies, we prove that the bulk photovoltaic (BPV) effect, which has been studied in the past for many non-centrosymmetric materials, is at the origin of the anomalous PV effect in BFO films. Moreover, we show that irrespective of the measurement geometry, V oc as high as 50 V can be achieved by controlling the conductivity of domain walls (DW). We also show that photoconductivity of the DW is markedly higher than in the bulk of BFO. | |
| License of this version: | CC BY-NC-ND 3.0 Unported |
| Document Type: | Article |
| Publishing status: | publishedVersion |
| Issue Date: | 2013 |
| Appears in Collections: | Fakultät für Elektrotechnik und Informatik |
distribution of downloads over the selected time period:
downloads by country:
| pos. | country | downloads | ||
|---|---|---|---|---|
| total | perc. | |||
| 1 |  |
Germany | 81 | 41.54% |
| 2 |  |
United States | 54 | 27.69% |
| 3 |  |
China | 21 | 10.77% |
| 4 |  |
India | 8 | 4.10% |
| 5 |  |
No geo information available | 5 | 2.56% |
| 6 |  |
Mexico | 5 | 2.56% |
| 7 |  |
Taiwan | 3 | 1.54% |
| 8 |  |
Canada | 3 | 1.54% |
| 9 |  |
Netherlands | 2 | 1.03% |
| 10 |  |
Iran, Islamic Republic of | 2 | 1.03% |
| other countries | 11 | 5.64% | ||
Further download figures and rankings:
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