Polarized photoelectric detection has a very wide range of applications in military, medical, environmental and other fields. However, most of the reported polarized photoelectric detections are two-dimensional inorganic compounds. Their small crystal size and poor stability restrict their practical application. Two-dimensional hybrid double perovskite materials have the characteristics of non-toxicity, good stability, long carrier life, and easy crystal growth. They have shown excellent performance in photoelectric detection and high-energy ray detection, etc. The structure has unique anisotropy, which makes it possible to realize the research of polarized photoelectricity. In addition, this two-dimensional hybrid double perovskite exhibits unique compatibility and tunability, and the electronic, optical and optoelectronic properties of the material can be modulated by adjusting organic and inorganic components. However, polarization photoelectric detection based on two-dimensional hybrid double perovskite materials has not been reported.
The team of Luo Junhua, a researcher of inorganic optoelectronic functional crystal materials at the State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences With the support of the Youth Fund project, a case of hybrid double perovskite compound (i-PA) 2CsAgBiBr7 (i-PA is isoamylamine) with a unique two-dimensional quantum hydrazine structure was designed and synthesized. The compound has excellent photoelectric performance, and its polarized light current has a sinusoidal relationship with the polarization angle, the dichroic ratio reaches 1.35, and the compound has excellent repeatability and stability of the polarized light response switch, and Fast light response time, reaching 200 μs. This work is the first report on the research of two-dimensional hybrid double perovskite compounds in polarized optoelectronics, showing that the two-dimensional hybrid double perovskite has great research potential in the fields of photoelectric detection and other fields. Related results are published in the form of communication in "German Applied Chemistry" (Angew. Chem. Int. Ed. 2019, DOI: 10.1002 / anie.201911551). The first author of the paper is Li Yaobin, a co-cultivating master student.
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