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Method for preparing caesium-lead halide nanorod and product obtained through method

A cesium lead halide, nanorod technology, applied in the direction of lead halide, nanotechnology, etc., achieves the effects of simple operation, good crystal shape and uniform morphology

Active Publication Date: 2016-03-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports in the literature and patents on the preparation of rod-like cesium lead halide perovskite nanocrystals by low-temperature organic phase synthesis.

Method used

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  • Method for preparing caesium-lead halide nanorod and product obtained through method
  • Method for preparing caesium-lead halide nanorod and product obtained through method
  • Method for preparing caesium-lead halide nanorod and product obtained through method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.1 Add 84mg of lead iodide and 5mL of octadecene into a four-neck flask, and stir for 1h under nitrogen protection.

[0030] 1.2 Then add 1mL oleylamine and 1mL oleic acid to the mixture described in 1.1 successively, heat to 140°C after the lead iodide is completely dissolved, then add 0.4mL cesium precursor solution (cesium carbonate 0.16g, octadecene 6mL, 2.5mL of oleic acid, heated until the cesium carbonate is completely dissolved to obtain a cesium precursor solution) injected into the solution at an injection speed of 0.4mL / min, and the product was taken out after 10s of insulation reaction under the protection of nitrogen, and cesium iodide was obtained by centrifugal separation and washing lead nanorods.

[0031] 1.3 The diameter of the obtained cesium lead iodide nanorods is 10 nm, the length is 150 nm, and the crystal form is good. The luminous rate of the product can reach 30%.

Embodiment 2

[0033] 2.1 Add 84 mg of lead iodide and 5 mL of octadecene into a four-neck flask, and stir for 1 h under nitrogen protection.

[0034] 2.2 Then add 1mL oleylamine and 1mL oleic acid to the mixture described in 2.1 successively, heat to 150°C after the lead iodide is completely dissolved, then add 0.4mL cesium precursor solution (cesium carbonate 0.16g, octadecene 6mL, 2.5mL of oleic acid, heated until the cesium carbonate is completely dissolved to obtain a cesium precursor solution) injected into the solution at an injection speed of 0.4mL / min, kept warm and reacted for 10s under nitrogen protection, took out the product, and obtained rod-shaped cesium iodide by centrifugal separation and washing lead nanorods.

[0035] 2.3 The cesium lead iodide nanorods obtained in this example have a diameter of 15nm, a length of 300nm, and a luminous efficiency of up to 30%, indicating that the crystal form is good, such as figure 1 shown.

Embodiment 3

[0037] 3.1 Add 84 mg of lead iodide and 5 mL of octadecene into a four-neck flask, and stir for 1 h under nitrogen protection.

[0038] 3.2 Then add 1mL oleylamine and 1mL oleic acid to the mixture described in 3.1 successively, heat to 160°C after the lead iodide is completely dissolved, then add 0.4mL cesium precursor solution (cesium carbonate 0.16g, octadecene 6mL, 2.5 mL of oleic acid, heated until the cesium carbonate is completely dissolved to obtain a cesium precursor solution) injected into the solution at an injection speed of 0.4 mL / min, kept warm and reacted for 10 seconds under the protection of nitrogen, then took out the product, and cesium lead iodide was obtained by centrifugal separation and washing Nano stave.

[0039] 3.3 The cesium lead iodide nanorods obtained in this example have a diameter of 16 nm, a length of 330 nm, and a luminous efficiency of up to 30%, indicating that the crystal form is good.

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Abstract

The invention discloses a method for preparing a caesium-lead halide nanorod and the product obtained through the method. The method includes the steps that lead halide and octadecene are mixed to be stirred for 0.5-1.5 hours, and then oleylamine and oleic acid are added into a mixture in sequence to be stirred till the lead halide is completely dissolved; the lead halide is heated to 130-200 DEG C after being completely dissolved, then a caesium precursor solution is slowly poured into liquor, and caesium-lead halide is prepared through a thermal insulation reaction; after the reaction is completed, reaction liquid is subjected to centrifuging, separating and washing, and accordingly the caesium-lead halide nanorod is obtained. According to the method, the caesium-lead halide nanorod is synthesized in an organic phase system, the reaction temperature is 130-200 DEG C, and the method belongs to a low-temperature organic phase synthesis method; the method is easy to operate, high-temperature and high-pressure reactions can be avoided, safety is achieved, the size of the nanorod can be regulated and controlled through the reaction condition, the obtained caesium-lead halide nanorod is even in shape, good in crystal form, and wide in application prospect in the fields of solar cells, LEDs, panel display and the like.

Description

technical field [0001] The invention relates to a method for preparing cesium lead halide nanorods and the resulting product, in particular to a method for synthesizing cesium lead halide nanorods of different sizes by using a low-temperature organic phase method and the obtained cesium lead halide nanorods. Background technique [0002] Semiconductor nanocrystals are a new type of nanomaterials. In recent years, with the deepening research on their synthesis and performance, their unique optical and electronic properties have attracted more and more attention. The general chemical formula of the ideal inorganic perovskite crystal structure is ABX 3 . In 2009, Miyasalka et al. first introduced the organic-inorganic perovskite structure of CH 3 NH 3 wxya 3 (X=Cl, Br, I) is used as a light-absorbing material in quantum dot solar cells, and its photoelectric conversion efficiency is 3.81% (AkihiroKojima and TsutomuMiyasaka, et al. JACS, 2009, 131:6050-6051). CH relative ...

Claims

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Application Information

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IPC IPC(8): C01G21/16B82Y40/00
CPCC01G21/16C01P2002/72C01P2004/04C01P2004/16
Inventor 杨萍杜莹莹
Owner UNIV OF JINAN
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