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Hydro-thermal synthesis method for copper-zinc-tin-sulfur photoelectric material

A photoelectric material, copper-zinc-tin-sulfur technology, applied in tin compounds, chemical instruments and methods, circuits, etc., can solve the problems of easy carbonization, limit the conversion efficiency of solar cells, etc., and achieve low cost, good repeatability, and simple operation. Effect

Inactive Publication Date: 2011-11-23
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Xiaotang Lu et al published "Wurtzite Cu 2 ZnSnS 4 Nanocrystals: a novel quaternary semiconductor" (Wurtzite structure copper zinc tin sulfur nanocrystal: a new quaternary semiconductor compound) announced a Wurtzite structure copper zinc tin sulfur nanomaterial. The method uses high boiling point Organic solvents and protective agents are easy to carbonize during heat treatment and easy to form recombination centers, which will limit the conversion efficiency of the prepared solar cells to a certain extent

Method used

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Embodiment 1

[0039] Embodiment 1: a kind of hydrothermal synthesis method of copper-zinc-tin-sulfur photoelectric material, concrete steps are as follows:

[0040] 1) Weigh 0.5 mmol of zinc chloride, 0.5 mmol of stannous chloride, 1 mmol of copper chloride, 4 mmol of thiourea, and 20 ml of water, and stir them with magnetic force to make them evenly mixed to obtain a precursor solution.

[0041] 2) Transfer the precursor solution obtained in step 1) to a stainless steel reactor lined with polytetrafluoroethylene, and react at a constant temperature of 200° C. for 10 hours. After the reaction was completed, it was naturally cooled to room temperature. The obtained product was washed 4 times with absolute ethanol at room temperature and then centrifuged. After the separated product is dried, the powder body of the copper-zinc-tin-sulfur photoelectric material is obtained.

Embodiment 2

[0042] Embodiment 2: a kind of hydrothermal synthesis method of copper-zinc-tin-sulfur photoelectric material, concrete steps are as follows:

[0043] 1) Weigh respectively 0.5 mmol of zinc chloride, 0.5 mmol of tin protochloride, 1 mmol of cupric chloride, 4 mmol of thiourea, 20 ml of mixed solvent of water and ethylenediamine with a volume ratio of 1:1 , and magnetic stirring to make it evenly mixed to obtain a precursor solution.

[0044] 2) Transfer the precursor solution obtained in step 1) to a stainless steel reactor lined with polytetrafluoroethylene, and react at a constant temperature of 180° C. for 24 hours. After the reaction was completed, it was naturally cooled to room temperature. The obtained product was washed 4 times with absolute ethanol at room temperature and then centrifuged. After the separated product is dried, the powder body of the copper-zinc-tin-sulfur photoelectric material is obtained.

Embodiment 3

[0045] Embodiment 3: a kind of hydrothermal synthesis method of copper-zinc-tin-sulfur photoelectric material, concrete steps are as follows:

[0046] 1) take by weighing 1 mmol zinc chloride, 0.33 mmol stannous chloride, 0.67 mmol cupric chloride, 4 mmol thiourea, 0.26 gram cetyltrimethylammonium bromide, 20 milliliters of water respectively, Stir magnetically to make it evenly mixed to obtain a precursor solution.

[0047] 2) The precursor solution obtained in step 1) was transferred to a stainless steel reactor lined with polytetrafluoroethylene, and reacted at a constant temperature of 220° C. for 16 hours. After the reaction was completed, it was naturally cooled to room temperature. The obtained product was washed 6 times with absolute ethanol at room temperature and then centrifuged. After the separated product is dried, the powder body of the copper-zinc-tin-sulfur photoelectric material is obtained.

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Abstract

The invention discloses a hydro-thermal synthesis method for a copper-zinc-tin-sulfur photoelectric material, belonging to the field of preparation of inorganic nano materials. The method comprises the following steps of: dissolving a zinc salt, a tin salt and a cupric salt into a solvent in the molar ratio (0.5-6):(0.3-1):(0.5-2), adding a sulfur-containing compound of which the mole number is 1-4 times of the total mole number of the metal salts and 0-1 millimole of surfactant and reacting at 150-220 DEG C for 5-48 hours; and centrifuging and drying to obtain copper-zinc-tin-sulfur photoelectric material powder. In the method, tetragonal-phase copper-zinc-tin-sulfur photoelectric material powder and orthogonal-phase copper-zinc-tin-sulfur photoelectric material powder are synthesized respectively with a hydro-thermal method and an ethylene diamine-assisted hydro-thermal method; and the method is easy to operate, has high repeatability and low cost, and is easy for realizing mass production.

Description

technical field [0001] The invention relates to a hydrothermal synthesis method of a copper-zinc-tin-sulfur photoelectric material, which belongs to the field of preparation of inorganic nanometer materials. Background technique [0002] With the continuous development of society and economy, people urgently need to find a clean and renewable new energy to replace the existing non-renewable energy, so as to alleviate the increasingly serious energy crisis. Solar energy, as an infinitely renewable and abundant clean energy, has attracted widespread attention. How to further develop and utilize solar energy has become a research hotspot today. Photovoltaic technology, which can convert solar energy into electrical energy, is one of the important means to solve energy problems in the future. Solar cells with high conversion efficiency, stable performance and low price are the goals pursued by scientists. [0003] The focus of current solar cell research is the exploration of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18C01G19/00
CPCY02P70/50
Inventor 占金华蒋贺纯代鹏程
Owner SHANDONG UNIV
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