Above-Band Gap Photoinduced Stabilization of Engineered Ferroelectric Domains
- The Australian National Univ., Canberra ACT (Australia)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Chinese Academy of Sciences, Shanghai (People's Republic of China)
- Australian National Univ., Canberra ACT (Australia)
The effect of above-band gap photons on the domains of the BiFeO3 (BFO) thin film was investigated via piezoresponse force microscopy and Kelvin probe force microscopy. It is found that under above-band gap illumination, the relaxation time of the polarization state was significantly extended, while the effective polarizing voltage for the pristine domains was reduced. We propose that this photoinduced domain stabilization can be attributed to the interaction between photogenerated surface charges and domains. Importantly, a similar phenomenon is observed in other ferroelectric (FE) materials with an internal electric field once they are illuminated by above-band gap light, indicating that this photoinduced stabilization is potentially universal rather than specific to BFO. Furthermore, this study will not only contribute to the knowledge of photovoltaic (PV) phenomena but also provide a new route to promote the stability of PV and FE materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Australian Research Council; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1466402
- Journal Information:
- ACS Applied Materials and Interfaces, Vol. 10, Issue 15; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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