Bulk Photovoltaic Current Mechanisms in All-Inorganic Perovskite Multiferroic Materials
Jiazheng Chen,
Guobin Ma,
Boxiang Gong,
Chaoyong Deng,
Min Zhang,
Kaixin Guo,
Ruirui Cui,
Yunkai Wu,
Menglan Lv,
Xu Wang
Affiliations
Jiazheng Chen
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
Guobin Ma
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
Boxiang Gong
Guiyang Makers Center, Guizhou 550025, China
Chaoyong Deng
School of Electronics and Information Engineering, Guiyang University, Guiyang 550005, China
Min Zhang
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
Kaixin Guo
School of Electronics and Information Engineering, Guiyang University, Guiyang 550005, China
Ruirui Cui
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
Yunkai Wu
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
Menglan Lv
School of Chemistry and Chemical Engineering, Guizhou University, Guizhou 550025, China
Xu Wang
Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guizhou 550025, China
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.
