Ferroelectricity in Sn-based Perovskite Semiconductor Films
Author Information
Author(s): Liu Yu, Yang Shuzhang, Hua Lina, Yang Xiaomin, Li Enlong, Wen Jincheng, Wu Yanqiu, Zhu Liping, Yang Yingguo, Zhao Yan, An Zhenghua, Chu Junhao, Li Wenwu
Primary Institution: Fudan University
Hypothesis
Can doping Sn-based perovskite films with 2-methylbenzimidazole induce ferroelectricity?
Conclusion
Doping Sn-based perovskite films with 2-methylbenzimidazole successfully induces ferroelectricity, enhancing their semiconductor properties.
Supporting Evidence
- The introduction of 2-methylbenzimidazole enhances the crystallinity of Sn-based perovskite films.
- The remanent polarization of the doped films reached 23.2 μC/cm2.
- Transistors made from the doped films exhibited a low subthreshold swing of 67 mV/dec.
- Hydrogen bonding from the doping process contributes to the emergence of ferroelectricity.
- X-ray diffraction confirmed improved crystallinity after doping.
- Second harmonic generation spectroscopy indicated spatial symmetry breaking in the doped films.
- Ferroelectric characteristics were validated through piezoelectric atomic force microscopy.
Takeaway
Scientists found a way to make special films that can switch electricity on and off by adding a tiny molecule, making them useful for new electronic devices.
Methodology
The study involved doping Sn-based perovskite films with 2-methylbenzimidazole and analyzing their crystallinity and ferroelectric properties using various characterization techniques.
Limitations
The study does not address the long-term stability of the ferroelectric properties under operational conditions.
Digital Object Identifier (DOI)
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