Domain Wall Free Polar Structure Enhanced Photodegradation Activity in Nanoscale Ferroelectric Ba x Sr 1‐ x TiO 3
Journal article
Wang, Y., Zhang, M., Liu, J., Zhang, H., Li, F., Tseng, C.W., Yang, B., Smith, G., Zhai, J., Zhang, Z., Dunn, S. and Yan, H. (2020). Domain Wall Free Polar Structure Enhanced Photodegradation Activity in Nanoscale Ferroelectric Ba x Sr 1‐ x TiO 3. Advanced Energy Materials. 10 (38), p. 2001802. https://doi.org/10.1002/aenm.202001802
| Authors | Wang, Y., Zhang, M., Liu, J., Zhang, H., Li, F., Tseng, C.W., Yang, B., Smith, G., Zhai, J., Zhang, Z., Dunn, S. and Yan, H. |
|---|---|
| Abstract | Ferroelectric materials exhibit anomalous behavior due to the presence of domains and domain walls which are related to the spontaneous polarization inherent in the crystal structure. Control of ferroelectric domains and domain walls has been used to enhance device performances in ultrasound, pyroelectric detectors, and photovoltaic systems with renewed interest in nanostructuring for energy applications. It is also known that ferroelectrics including domain walls can double photocatalytic rate and increase carrier lifetime from microsecond to millisecond. However, there remains a lack of understanding on the different contributions of the domain and domain walls to photocatalytic activities. Herein it is found, by comparing samples of nanostructured BaxSr1‐xTiO3 with and without a polar domain, that the material with polar domains has a faster reaction rate (k = 0.18 min−1) than the nonpolar one (k = 0.11 min−1). It is further revealed that the observed enhanced photoactivity of perovskite ferroelectric materials stems from the inherent polarization of the domain instead of domain walls. Here, the new understanding of the underlying physics of materials with a spontaneous dipole opens a door to enhance the performance of light induced energy harvesting systems. |
| Year | 2020 |
| Journal | Advanced Energy Materials |
| Journal citation | 10 (38), p. 2001802 |
| Publisher | Wiley |
| ISSN | 1614-6832 |
| Digital Object Identifier (DOI) | https://doi.org/10.1002/aenm.202001802 |
| Publication dates | |
| Online | 12 Aug 2020 |
| Publication process dates | |
| Accepted | 11 Jul 2020 |
| Deposited | 27 Aug 2020 |
| Publisher's version | License File Access Level Open |
| Accepted author manuscript | License File Access Level Controlled |
| Page range | 2001802-2001802 |
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