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New Progress in Research on Ferroelectric Semiconductors of Fujian Institute of Physical and Structural Engineering
[ Instrument Network Instrument R & D ] Nowadays, science and technology are everywhere around us. Smartphones, bike sharing, computers, etc. all represent the development of science and technology. So what is technology? Xiaobian learned that society is used to linking science and technology, collectively referred to as science and technology for short. The two are both closely related and have important differences. Science is solving theoretical problems, and technology is solving practical problems. The problem to be solved by science is to discover the relationship between facts and phenomena in nature and establish a theory to link facts and phenomena; the task of technology is to apply the results of science to practical problems.
In recent years, ferroelectricity has attracted the attention of researchers in organic-inorganic hybrid perovskite systems. Such materials have excellent carrier transport characteristics, unique tunable photoresponse, and solution processability. The potential applications of ferroelectric semiconductor materials in smart sensors, energy conversion, and self-driven photodetection have aroused research interest among researchers.
Luo Junhua, a researcher team of inorganic photovoltaic functional crystal materials from the State Key Laboratory of Structural Chemistry, Fujian Institute of Structures, Chinese Academy of Sciences With funding from other projects, a potential Sn-based hybrid perovskite-type ferroelectric semiconductor was constructed for the first time.
In the course of the research, by introducing large-sized organic amines, a series of two-dimensional multilayer hybrid perovskite ferroelectrics have been successfully designed and synthesized, and have shown excellent optoelectronic properties. However, most of these ferroelectrics contain high concentrations of toxic lead that can threaten the human body and biological systems, limiting their further applications. There is an urgent need to research and develop new lead-free hybrid perovskite ferroelectric semiconductors. This is the focus of this research.
In addition, considering the strict restrictions of the perovskite structure, Sn is a promising candidate material to replace Pb, which can meet the conditions of structural coordination, charge balance, and environmental friendliness. It was found that the distortion of the inorganic octahedron and the ordering of the organic cations in the compound induced the spontaneous polarization of the compound. The compound exhibited a Curie temperature above room temperature (318 K) and a spontaneous pole of 11.76 μC cm–2. Into. Sn-based hybrid perovskite ferroelectrics are not only lead-free, but are also expected to provide semiconductor characteristics and ferroelectric coupling to produce unique optoelectronic properties.
Fujian Institute of Architecture was established in 1960 by academician Lu Jiaxi, a well-known scientist and educator in China. It is an excellent research institute of the Chinese Academy of Sciences. After more than 50 years of development, it has won more than 230 important scientific and technological achievements and awards, including the three national science and technology awards and the special award for scientific and technological progress of the Chinese Academy of Sciences. .