Method for preparing CsPbBrxI3-x nanorod

A technology of nanorods and oleic acid, applied in the nano field, can solve the problems of low yield, long reaction time, complicated steps, etc., and achieve the effects of uniform structure, simplified reaction steps, and lower reaction temperature.

Active Publication Date: 2016-08-24
重庆纳鼎光电科技有限公司
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Problems solved by technology

This paper adopts the liquid phase synthesis method, and generates CsPbX after vacuum degassing and long-term high-temperature heating reaction. 3 Nanorods, which require the use of Schlenkline (Schlenk technology), the steps are more cumbersome, the reaction time is longer, and the yield is not too high

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  • Method for preparing CsPbBrxI3-x nanorod
  • Method for preparing CsPbBrxI3-x nanorod
  • Method for preparing CsPbBrxI3-x nanorod

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preparation example Construction

[0023] CsPbBr of the present invention x I 3-x The specific steps of the preparation method of nanorods are as follows:

[0024] (1) Cs with a concentration of 21.05 mg / ml was prepared with octadecene 2 CO 3 -ODE mixture, then add excess oleic acid to the mixture, and heat to Cs at 120°C under nitrogen atmosphere 2 CO 3 Complete reaction with OA to obtain cesium oleate solution;

[0025] (2) Take PbI according to the molar ratio of cesium and lead as 1:1.8 2 and PbBr 2 (the molar ratio of iodine and bromine is 2:1), mix the two into octadecene to prepare a mixture with a lead concentration of 36mol / L, then heat the mixture to 120°C under a nitrogen atmosphere, and then add a small amount of The ratio of oleylamine and oleic acid is 3:4 and the temperature is raised to 135°C. After heating for half an hour, PbI 2 and PbBr 2 Dissolve, then add the cesium oleate solution obtained in step (1), continue the reaction for 10-80min, put the product in an ice bath, centrifuge,...

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Abstract

The invention discloses a method for preparing a CsPbBrxI3-x nanorod. The method comprises the steps that a Cs2CO3-octadecene mixture is prepared, then excessive oleic acid is added into the mixture, the mixture is heated at the temperature of 120 DEG C under the nitrogen condition till Cs2CO3 and oleic acid completely react, and an oleic acid cesium solution is obtained; PbI2 and PbBr2 are taken and added into octadecene, the mixture is heated to 120 DEG C under the nitrogen condition, then a small amount of oleylamine and oleic acid is added, the temperature is raised to 135 DEG C, the mixture is heated till PbI2 and PbBr2 are dissolved, then the oleic acid cesium solution is added for reacting for 10 min to 80 min, the reaction product is subjected to an ice bath, centrifugation and methylbenzene purification, and the CsPbBrxI3-x nanorod is obtained. The molar ratio of cesium to lead is 1:1.8, and the molar ratio of iodine to bromine is 2:1. Compared with the prior art, the reaction steps are simplified, the reaction time is shortened, the temperature needed for the reaction is reduced, and the band gap and fluorescence emission of the CsPbBrxI3-x nanorod can be adjusted through the duration of the reaction time.

Description

technical field [0001] The invention belongs to the field of nanotechnology, in particular to the shape control of inorganic halide perovskite and its preparation method, in particular to a CsPbBr x I 3-x Preparation method of nanorods. Background technique [0002] CaB 3 Nanorods (X is a halogenated element, the same below) are a new type of inorganic functional materials, which are considered to be a class of materials with excellent prospects in the fields of optoelectronic applications, such as solar cells, LED lighting, lasers, and photoelectric detection. In recent years for CsPbX 3 Nanorods have aroused the interest of more and more scholars. For example, the American Chemical Society's "Journal of the American Chemical Society" titled "Solution-Phase Synthesis of Cesium Lead Halide Perovskite Nanowires" (2015, 137(29): 9230-9233) reported in detail the CsPbX 3 Preparation of nanorods and discussion of the mechanism. This paper adopts the liquid phase synthesis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/16
CPCC01G21/006C01P2002/72C01P2002/85C01P2004/03C01P2004/04C01P2004/16
Inventor 唐孝生臧志刚胡智萍邵海兵
Owner 重庆纳鼎光电科技有限公司
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