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Method of preparing large-dimension cadmium sulfide film by chemical water-bath method

A chemical water bath and cadmium sulfide technology, applied in the field of solar cells, can solve the problems of affecting the experimental environment, low utilization rate of raw materials, slow heating rate, etc., and achieve the effects of less raw material consumption, simple equipment, and reduced solution consumption.

Active Publication Date: 2014-03-19
山东中科泰阳光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although CdS is only about 50nm thick, Cd in CdS is a toxic heavy metal ion, which will pollute the environment during the preparation, use and recycling of CdS
Since the substrate is completely immersed in the reaction container, more reaction solution is often required, the raw material utilization rate is low, and the heating rate is slow and not high; in addition, CdS films and particles will also grow on the back of the substrate that does not need to be deposited, affecting lab environment

Method used

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  • Method of preparing large-dimension cadmium sulfide film by chemical water-bath method
  • Method of preparing large-dimension cadmium sulfide film by chemical water-bath method
  • Method of preparing large-dimension cadmium sulfide film by chemical water-bath method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of reaction solution: Weigh 0.58g of cadmium sulfate and 7.4g of thiourea and dissolve them in 1.3L of deionized water, then add 0.2L of 25% ammonia water to obtain a reaction solution;

[0047] 2. Substrate installation: clean two 30×30cm substrates ultrasonically, dry them with nitrogen, and insert them into the groove of the reaction vessel, keep the two substrates closely attached to the upper and lower surfaces of the reaction vessel, and then Pour the reaction solution, keep the volume of the reaction solution smaller than the volume of the reaction vessel, and seal the reaction vessel;

[0048] 3. Deposition of thin film: Put the sealed reaction vessel horizontally into the constant temperature water bath oscillator, and the reaction vessel will mix the solution evenly in a reciprocating motion. The temperature of the water bath is 60°C, and the reaction time is 20 minutes;

[0049] 4. Cleaning of the substrate: The substrate deposited with the CdS...

Embodiment 2

[0051] 1, the preparation of reaction solution: with embodiment 1;

[0052] 2, the installation of substrate: with embodiment 1;

[0053] 3. Deposition of thin film: Put the sealed reaction container horizontally into the constant temperature water bath oscillator, and the reaction container swings up and down to mix the solution evenly. The temperature of the water bath is 60°C, and the reaction time is 20 minutes;

[0054] 4. Cleaning of the substrate: same as in Example 1.

Embodiment 3

[0056] 1, the preparation of reaction solution: with embodiment 1;

[0057] 2, the installation of substrate: with embodiment 1;

[0058] 3. Deposition of thin film: Put the sealed reaction vessel horizontally into the constant temperature water bath oscillator, and the reaction vessel will mix the solution evenly in a reciprocating motion. The temperature of the water bath is 80°C, and the reaction time is 15 minutes;

[0059] 4. Cleaning of the substrate: same as in Example 1.

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Abstract

The invention relates to a method of preparing a large-dimension cadmium sulfide film by a chemical water-bath method. The method comprises the following steps: fixing one surface, which does not need to be coated with a film, of at least one substrate in a reaction container in a closed manner; injecting reaction liquor containing a cadmium salt, a sulfur source, ammonia water and deionized water into the reaction container, and then sealing the reaction container, wherein volume of the reaction liquor is smaller than that of the reaction container; horizontally immersing the sealed reaction container into a constant-temperature water bath oscillator, heating and carrying out water-bath, so that the reaction container upwards circles round and reciprocates in the horizontal direction or uniformly mixes the reaction liquor without stop in a moving mode of swinging up and down by taking a middle axle as a shaft center to deposit a uniform cadmium sulfide film on one un-sealed surface of at least one substrate; and after depositing the cadmium sulfide film to needed thickness, taking out, cleaning and drying to prepare the large-dimension cadmium sulfide film.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing a large-size cadmium sulfide film by a chemical water bath method. Background technique [0002] Today, with the increasing shortage of energy and the increasing environmental pollution, solar energy has attracted more and more attention due to its advantages of non-pollution, widest distribution and inexhaustibility. Among them, thin film battery materials have become one of the current research hotspots. [0003] CdS is a chemically stable wide-bandgap semiconductor material with a wurtzite structure and a direct bandgap semiconductor with a bandgap of 2.4eV. As n-type semiconductor layer and absorber layer in many solar cells, such as CIGS and CdTe solar cells. In these devices, light passes through the CdS window layer and is absorbed by the p-type semiconductor near the pn junction. The quality of the CdS thin film is very important to the efficiency and ...

Claims

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Application Information

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IPC IPC(8): C23C18/16
Inventor 黄富强李爱民王耀明朱小龙秦明升张雷谢宜桉
Owner 山东中科泰阳光电科技有限公司
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