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Method for synthesizing CdSe/P3HT composite nanocrystals by direct growth method

A nanocrystalline, direct technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of harsh reaction conditions, high preparation cost, high reaction temperature, and achieve lower reaction temperature, good thermal stability, and alignment. neat effect

Inactive Publication Date: 2015-12-30
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of harsh reaction conditions, high preparation cost, unfriendly environment, and excessively high reaction temperature during preparation by one-step growth method in the prior art, Provide a method for the synthesis of CdSe / P3HT composite nanocrystals by direct growth method

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  • Method for synthesizing CdSe/P3HT composite nanocrystals by direct growth method
  • Method for synthesizing CdSe/P3HT composite nanocrystals by direct growth method
  • Method for synthesizing CdSe/P3HT composite nanocrystals by direct growth method

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Effect test

Embodiment 1

[0020] A kind of method of direct growth method synthetic CdSe / P3HT composite nanocrystal, comprises the following steps:

[0021] 1) Pour 6g of polymer P3HT, 79g of Se powder, 340g of cadmium stearate, 1L of trichlorobenzene, and 15L of ODE into the reaction kettle, stir well, and react at 140°C for 25h;

[0022] 2) Cool, add acetone to wash, precipitate, centrifuge, and centrifuge at 3000r for 5-10 minutes, discard the supernatant, dissolve the precipitate with excess n-hexane, wash and dry to obtain the CdSe / P3HT composite nanocrystals.

[0023] The size of CdSe superstructure hybrid nanocrystals is about 20nm on average.

Embodiment 2

[0025] A kind of method of direct growth method synthetic CdSe / P3HT composite nanocrystal, comprises the following steps:

[0026] 1) Pour 6g of polymer P3HT, 395g of Se powder, 340g of cadmium stearate, 1L of trichlorobenzene, and 15L of ODE into the reaction kettle and stir well, and react at 180°C for 15 h ;

[0027] 2) Cool, add acetone to wash, precipitate, centrifuge, and centrifuge at 3000r for 5-10 minutes, discard the supernatant, dissolve the precipitate with excess n-hexane, wash and dry to obtain the CdSe / P3HT composite nanocrystals.

[0028] The size of CdSe superstructure hybrid nanocrystals is 5.3nm on average.

Embodiment 3

[0030] A kind of method of direct growth method synthetic CdSe / P3HT composite nanocrystal, comprises the following steps:

[0031] 1) Pour 6g of polymer P3HT, 395g of Se powder, 680g of cadmium stearate, 1L of trichlorobenzene, and 15L of ODE into the reaction kettle, stir well, and react at 240°C for 5h;

[0032] 2) Cool, add acetone to wash, precipitate, centrifuge, and centrifuge at 3000r for 5-10 minutes, discard the supernatant, dissolve the precipitate with excess n-hexane, wash and dry to obtain the CdSe / P3HT composite nanocrystals.

[0033] The size of CdSe superstructure hybrid nanocrystals is about 5nm on average.

[0034] figure 1 is the DSC curve of CdSe / P3HT, by figure 1 It can be seen that the decomposition process of CdSe / P3HT includes two exothermic peaks, the first exothermic peak begins to increase at 210 °C, the heat flow rate increases, the exothermic speed increases, and the released heat increases, reaching the maximum at 358 °C. The second exothermic...

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Abstract

The invention discloses a method for synthesizing CdSe / P3HT composite nanocrystals by adirect growth method. The method comprises the following steps of pouring 6 parts by weight of a polymer P3HT, 79 to 395 parts by weight of Se powder, 340 to 680 parts by weight of cadmium stearate, 1 part by volume of trichlorobenzene and 15 parts by volume of ODE into a reaction kettle for complete stirring, and performing reaction for 5 to 25h at 140 to 240 DEG C; performing acetone washing and precipitation, performing dissolution with n-hexane and performing washing and drying to obtain the CdSe / P3HT composite nanocrystals. According to the method, reaction temperature is remarkably reduced, so that implementation of industrial production is facilitated; the generated CdSe / P3HT composite nanocrystals are of a zero-dimensional nano-microsphere structure, are sized to be about 5 to 20nm, averagely about 5.3nm, are uniform in size and shape distribution and regular in arrangement, have higher photoelectric conversion efficiency and higher thermal stability, and can be decomposed at higher than 210 DEG C; moreover, use of an organic phosphonic compound which is high in toxicity and cost for a reaction system is avoided, so that the method is more environment-friendly and has higher practical significance in nowadays with promotion of green-chemistry.

Description

technical field [0001] The invention relates to the field of preparation of polymer solar photovoltaic cell materials, in particular to a method for synthesizing CdSe / P3HT composite nanocrystals by a direct growth method. Background technique [0002] Organic-inorganic hybrid solar cells prepared by inorganic-organic semiconductor nanocrystalline hybrid blending system have both the advantages of organic batteries and many excellent properties of inorganic semiconductors, and have good development prospects, so they have become a hot research topic for scientists. CdSe nanocrystals currently used in polymer solar cells are mostly prepared by the TOPO method (a kind of organic liquid phase synthesis method). The nanocrystals prepared by this method have good morphology and crystallinity, but the reaction conditions are harsh, requiring the use of phosphine-containing solvent TOPO and precursor TOP, which are difficult to remove after the reaction, affecting the photoelectric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/60C30B29/54
Inventor 吴瑞凤施和平
Owner INNER MONGOLIA UNIV OF TECH
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