Bulk Photovoltaic Current Mechanisms in All-Inorganic Perovskite Multiferroic Materials

Abstract

After the discovery of bulk photovoltaic effect more than half a century ago, ferro-electrical and magneto-optical experiments have provided insights into various related topics, revealing above bandgap open voltages and non-central symmetrical current mechanisms. However, the nature of the photon-generated carriers responses and their microscopic mechanisms remain unclear. Here, all-inorganic perovskite Bi0.85Gd0.15Fe1−xMnxO3 thin films were prepared by a sol-gel process and the effects of Gd and Mn co-doped bismuth ferrites on their microtopography, grain boundries, multiferroic, and optical properties were studied. We discovered a simple “proof of principle” type new method that by one-step measuring the leakage current, one can demonstrate the value of photo generated current being the sum of ballistic current and shift current, which are combined to form the so-called bulk photovoltaic current, and can be related to the prototype intrinsic properties such as magneto-optical coupling and ferroelectric polarization. This result has significant potential influence on design principles for engineering multiferroic optoelectronic devices and future photovoltaic industry development.

Tuneable Schottky contact of MoSi2N4/TaS2 van der Waals heterostructure

“…A promising solution is building van der Waals heterostructures (vdw) by combining two or more different materials in two dimensions. This approach not only combines the benefits of two-dimensional materials but also introduces unusual physics, excellent optical properties, and many new phenomena [14] , [15] , [16] , [17] . Recent investigations have delved deeply into single-to-multilayer 2D materials and their vertically stacked van der Waals heterostructures, which boast tuneable electronic properties and extraordinary mechanical characteristics [18] , [19] .…”

Ultrafast Antisolvent Growth of Single-Crystal CsPbBr3 Microcavity for Whispering-Gallery-Mode Lasing

“…In recent years, all-inorganic perovskites, particularly CsPbX 3 (where X = Cl, Br, and I), have emerged as promising materials for various optoelectronic applications. One of the main reasons for their growing preference over hybrid organic–inorganic perovskites is their superior electronic properties and enhanced stability against environmental factors such as moisture, oxygen, and heat [ 14 , 15 , 16 ]. As a result, these materials are particularly favoured for laser gain materials, which hold promising applications in areas like on-chip optical communication, sensors, and computing [ 17 , 18 , 19 ].…”