| Autor: |
Yinxin Bai, Wei Hao, Yanghe Wang, Junjiang Tian, Chuanshou Wang, Yunlin Lei, Yihao Yang, Xiaodong Yao, Qihang Liu, Changjian Li, Mingqiang Gu, Junling Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
PRX Energy, Vol 3, Iss 2, p 023004 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2768-5608 |
| DOI: |
10.1103/PRXEnergy.3.023004 |
| Popis: |
The bulk photovoltaic effect (BPVE) in ferroelectric materials has attracted much attention due to its above-band-gap photovoltage and switchable photoresponse. However, the exact correlation between the photocurrent and spontaneous polarization remains unclear. Here, we report an anomalous reversal of the photocurrent, even for the same polarization direction, in van der Waals (vdW) ferroelectric CuInP_{2}S_{6} (CIPS). Careful analysis reveals that the relocation of Cu ions into the vdW gap upon thickness reduction causes the current reversal, even though it does not change the polarization direction. By combining theoretical and experimental studies, we show clearly the decoupling of the BPVE photocurrent and electric polarization. This discovery significantly improves our understanding of the BPVE and demonstrates yet another example of the lattice dimensionality effect in vdW ferroelectrics. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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