Ferroic Halide Perovskite Optoelectronics. (4th June 2021)

• Record Type: Journal Article
• Authors: Liu, Yongtao; Kim, Dohyung; Ievlev, Anton V.; Kalinin, Sergei V.; Ahmadi, Mahshid; Ovchinnikova, Olga S.
• Is Part Of: Advanced functional materials. Volume 31:Number 36(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-04
• Subjects: ferroelastic -- ferroelectric -- ion migration -- metal halide perovskites -- strain; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202102793
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Metal halide perovskites (MHPs) as one of the most active materials gained tremendous attention in the past decade because of their outstanding performance in optoelectronics. Owing to their perovskite structure, ferroelectricity is anticipated in this class of materials. However, whether MHPs are ferroelectric or not remains elusive. Recently, discussion regarding ferroelasticity in MHPs has been also raised. In addition, ionic motion and structural dynamics are well known in MHPs. The interplay of these phenomena including electric polarization, strain, ionic motion, and structural dynamics can have a significant impact on optoelectronics. Therefore, understanding the mechanism behind these phenomena and their interactions is critical in addressing the controversy about ferroicity of MHPs and developing functional devices. Here, the current findings about MHP's ferroicity are summarized and evaluated and a perspective for the future is provided. It is suggested that ionic motion and associated phenomena, coupled with ferroic behavior, are the main drivers behind MHPs functionality. The challenges are also discussed in probing MHPs' ferroicity and what new measurement modalities are needed to fully understand and characterize MHP behavior. Finally, it is discussed how ferroic and strain can affect the optoelectronic performance of MHPs and how they can be used for engineering of higher performance devices. Abstract : This work discusses the current findings about the ferroicity of metal halide perovskites (MHPs) and the challenges in probing MHPs' ferroicity. It is suggested that ionic motion and associated phenomena, coupled with ferroic behavior, are the main drivers behind MHPs functionality. Finally, how ferroicity and strain can affect the optoelectronic performance of MHPs is discussed.