Research Progress of Crystal Materials with Ferroelectric Semiconductor Photoelectric Effect
The polar optoelectronic functional crystal material with a non-center symmetrical structure is based on spontaneous polarization and exhibits excellent optical properties such as nonlinear optics, piezoelectricity, pyroelectricity, and ferroelectricity. However, only compounds that crystallize at 10 polar point groups can produce polarization effects. How to innovate the structural design of polar-optical functional crystalline materials, and use primitives to achieve a uniform arrangement of dipole moments and to assemble on the macroscopically strong The polarization of compounds to obtain crystalline materials with excellent photoelectric properties has become an important scientific problem in this field. State Key Laboratory of Structural Chemistry, Institute of Structure of Matter, Fujian Institute of Research on the Structure of Inorganic Materials, Chinese Academy of Sciences and Researcher of the Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences, Luo Junhua, Research Group of Inorganic Photoelectric Functional Crystal Materials, National Outstanding Youth Fund, Haixi Research Institute, "100-member team" Researcher Under the support of Sun Zhihua’s “Spring Miao Talent†special project and the Fujian Outstanding Young Scientists Fund, a strategy of polarization-induced polarization-induced polarization effects was proposed, and a series of novel polar-optical functional crystalline materials was constructed. Recently, the team established a ferroelectric crystal material with a perovskite-like structure based on a design strategy of solid phase transformation symmetry breaking-induced polarization effects. In the phase transition process, the cations are aligned along the polar axis, and they cooperate with the metal skeleton to produce a strong polarization effect. The study found that under light conditions, the crystals exhibit anisotropic semi-optoelectronic characteristics. Significant temperature-dependent photovoltaic and photocurrents are generated along the two-dimensional extension of the metal framework layer, and the photoconductivity is clearly exhibited in the vertical direction; further structural analysis reveals that the ferroelectric effect of this material has played on its photovoltaic performance. The decisive role, the relevant research results were published in "Angew. Chem., Int. Ed., 2016, DOI: 10.1002/anie.201601933". The successful preparation of the ferroelectric semiconductor photoelectric crystal material will effectively expand the potential applications of inorganic/organic hybrid perovskite-like materials in photovoltaic solar energy and photoelectric detection. Previously, on the basis of exploring the phase transition mechanism of crystalline materials in the early stage (Adv. Fuct. Mater., 2012, 22, 4855), the polarization effect induced by the symmetry breakage of the solid phase transition process was used to develop a solid structure. A new method for the crystal material of frequency-doubled switching (Adv. Mater., 2013, 25, 4159, Chem. Mater., 2015, 27, 4493); and taking the lead in extending this strategy to a plastic phase change material system and obtaining ultra-high switching Frequency-doubled switching crystal material (J. Am. Chem. Soc., 2015, 137, 15560); obtaining crystalline materials with spontaneous polarization of ferroelectrics (Angew. Chem., Int. Ed., 2012, 51, 3871) and successfully applied ferroelectric crystal materials to highly sensitive pyroelectric detection (Adv. Mater., 2015, 27, 4795). In addition, the team also used the chemical elements of BO3 and PO4 to regulate the synthesis of non-central symmetrical compounds and obtained a series of UV and DUV non-linear optical crystal materials, including the development of a series of non-layered borate-free deep ultraviolet non-layered habits. Linear optical crystal materials (J. Am. Chem. Soc., 2016, 138, 2961; J. Am. Chem. Soc., 2015, 137, 2207; Nat. Commun., 2014, 5, 4019) and extended phosphoric acid Salt deep UV nonlinear optical crystal material (J. Am. Chem. Soc., 2014, 136, 8560; Angew. Chem., Int. Ed., 2015, 54, 4217). Measuring Tape MID certification; ISO9001 certification;
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