Stable photovoltaic output and optically tunable resistive switching in all-inorganic flexible ferroelectric thin film with self-polarization characteristic. (15th September 2021)

• Record Type: Journal Article
• Authors: Li, Yong; Cui, Xiaxia; Tian, Mengwei; Wang, Guangcheng; Hao, Xihong
• Is Part Of: Acta materialia. Volume 217(2021)
• Publication Date: 2021-09-15
• Subjects: Flexible -- Ferroelectric -- Thin film -- Photovoltaic -- Resistive switching; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2021.117173
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: The immense potential of photo-electrical materials applied in intelligent and wearable electronic devices has motivated many researches on flexible ferroelectric thin film. However, how to enhance stability of output and achieve multifunction is still a challenge. Here, an all-inorganic flexible ferroelectric thin film with Au/Bi2 FeMo0.7 Ni0.3 O6 /LaNiO3 /Nickel foil structure is prepared by sol-gel method. The thin film exhibits excellent photovoltaic stability. The change rates of the short circuit currents and open circuit voltages are less than 5% in different bending states and after bending-releasing cycles, which is attributed to its stable self-polarization characteristic. Furthermore, an optically tunable resistive switching behavior is found in the thin film. The switching voltages and ON/OFF ratio of resistance can be tuned in real time by on-off control of light, demonstrating a correlation between resistive switching and photovoltaic effect. It is proposed that the photovoltaic effect modulates the energy band structure of the thin film, leading to an increased ON/OFF ratio of resistance. This work opens up a promising route to the development of multifunctional flexible photo-electrical materials. Graphical abstract: Image, graphical abstract