Benzimidazole cationic two-dimensional perovskite material as well as preparation method and application thereof

A technology of benzimidazolium and perovskite materials, which is applied in the direction of luminescent materials, organic chemical methods, chemical instruments and methods, etc., can solve the problems of poor stability of two-dimensional perovskite, and achieve less crystal defect states and higher stability high effect
CN112624978AActive Publication Date: 2021-04-09BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2021-04-09

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Abstract

The invention relates to a benzimidazole cation <100>-type two-dimensional perovskite material as well as a preparation method and an application thereof, and belongs to the technical field of luminescent materials. The chemical formula of the material is (C7H7N2)2BX4, B is a metal ion Pb<2+>, Sn<2+> or Ge<2+>, and X is a halogen ion Cl<-> or Br<->. The material has high stability, wherein <100>the type 2D perovskite material (C7H7N2) 2PbBr4 shows bright deep blue light emission. The <100>-type 2D perovskite material (C7H7N2)2PbCl4 with a regular structure is a single component white light emitting material. Compared with an anti-solvent method and a volatilization method, the crystal material prepared through the cooling method has a larger size, the obtained crystal is transparent and free of obvious crystal boundary, crystal defect states are few, and the crystal material is a nearly perfect single crystal material with the regular structure and an ordered long range.
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Description

technical field

[0001] The invention relates to a benzimidazolium cation <100> type two-dimensional perovskite material, a preparation method and an application thereof, and belongs to the technical field of luminescent materials. Background technique

[0002] In the past decade, solid-state lighting (SSL) has emerged in the automotive lighting, architectural lighting and general lighting markets. Compared with traditional incandescent lamps and fluorescent lamps, it has the advantages of low energy consumption, high efficiency and long life. A typical SSL device consists of a light-emitting diode (LED) coated with a single phosphor (for example, a blue LED coated with a yellow phosphor) or an LED coated with a mixture of phosphors (for example, a UV LED coated with blue and yellow phosphors). LED). Although significant progress has been made in the down-conversion technology of white light-emitting diodes, there are still many problems and challenges that limit its ...

Claims

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