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Tin germanium sulfoselenide thin film and its preparation method, photoelectric conversion device

A technology of sulfur selenide and thin film, which is applied in selenium/tellurium compounds, chemical instruments and methods, elemental compounds other than selenium/tellurium, etc. Efficiency, easy mass production effect

Active Publication Date: 2020-07-31
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CZTSSe (copper zinc tin sulfur selenium compound) contains deep level defects related to divalent tin, which limits the improvement of photovoltage

Method used

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  • Tin germanium sulfoselenide thin film and its preparation method, photoelectric conversion device
  • Tin germanium sulfoselenide thin film and its preparation method, photoelectric conversion device
  • Tin germanium sulfoselenide thin film and its preparation method, photoelectric conversion device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Step 1, 1.5224g thioselenourea, 0.0872g CuCl, 0.1504g Zn(Ac) 2 , 0.2338g ZnCl 2 , 0.1072g GeCl 4 , 0.3384g SnCl 2 2H 2 O and 0.527g Cu(CH 3 COO) 2 ·H 2 O was sequentially dissolved into 20 ml of ethylene glycol methyl ether solution, and fully stirred to form a clear precursor solution (x=0.25).

[0060] Step 2. The clarified precursor solution was aged in air at 20° C. and 70% humidity for 6 hours to prepare an aged precursor solution. The aged precursor solution was prepared as a precursor sample thin film on a molybdenum glass substrate by spin coating. The rotational speed of spin coating is 1500 rpm, and the time is 30 seconds. Each spin-coated layer was calcined in air at 400°C for 5 minutes. In order to obtain the optimal film thickness, the spin coating was repeated 11 times.

[0061] Step 3, after spin coating is finished, adopt open device, be 0.5 atmospheric pressure with 12 grams of sulfur powders as sulfur source control sulfur bias, (more than 10...

Embodiment 2

[0063] Step 1, 1.5224g thioselenourea, 0.0872g CuCl, 0.123g Zn(Ac) 2 , 0.2508g ZnCl 2 , 0.0429g GeCl 4 , 0.4062g SnCl 2 2H 2 O and 0.527g Cu(CH 3 COO) 2 ·H 2 O was sequentially dissolved into 20 mL of ethylene glycol methyl ether solution, and fully stirred to form a clear precursor solution (x=0.1).

[0064] Step 2. The clarified precursor solution was placed in air at 20° C. and 70% humidity for 4 hours for aging to prepare an aged precursor solution. The aged precursor solution was prepared as a precursor sample thin film on a molybdenum glass substrate by spin coating. The rotational speed of spin coating is 1500 rpm, and the time is 30 seconds. Each spin-coated layer was calcined in air at 400°C for 5 minutes. In order to obtain the optimal film thickness, the spin coating was repeated 8 times.

[0065] Step 3. After the spin coating is completed, use an open device, use 12 grams of sulfur powder as a sulfur source, and vulcanize under a nitrogen atmosphere at 5...

Embodiment 3

[0067] Step 1, 1.5224g thioselenurea, 0.1504g CuCl, 0.289g Zn(Ac) 2 , 0.1478g ZnCl 2 , 0.1715g GeCl 4 , 0.2708g SnCl 2 2H 2 O and 0.3994g Cu(CH 3 COO) 2 ·H 2 O was sequentially dissolved into 20 mL of ethylene glycol methyl ether solution, and fully stirred to form a clear precursor solution (x=0.4).

[0068] Step 2. The clarified precursor solution was aged in air at 20° C. and 70% humidity for 8 hours to prepare an aged precursor solution. The aged precursor solution was prepared as a precursor sample thin film on a molybdenum glass substrate by spin coating. The rotational speed of spin coating is 1500 rpm, and the time is 30 seconds. Each spin-coated layer was calcined in air at 400°C for 5 minutes. In order to obtain the optimal film thickness, the spin coating was repeated 14 times.

[0069] Step 3. After the spin coating is completed, use an open device, use 12 grams of sulfur powder as a sulfur source, and vulcanize under a nitrogen atmosphere at 580 ° C for ...

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Abstract

The invention relates to a high-quality tin-germanium-sulfur selenide film prepared by simultaneously increasing the Ge content and the sulfur and selenium partial pressure. The Ge content is the relative ratio (Ge / (Ge+ Sn)) of Ge and Sn in tin-germanium-sulfur selenide (M1x1M2x2Sn1-xGexS1-ySey) (M1 is a mixture of one or two of Cu and Ag at an optional ratio, M2 is a mixture of one or two of Zn and Cd at an optional ratio, x1 is greater than or equal to 0 and less than or equal to 1, x2 is greater than or equal to 0 and less than or equal to 1, x is greater than 0 and less than or equal to 1, and y is greater than or equal to 0 and less than or equal to 1; and sulfur and selenium partial pressure is partial pressure of simple substance S steam, simple substance Se steam, H2S gas or H2Se gas in a sulfoselenide treatment process. By simultaneously increasing the Ge content and the sulfur and selenium partial pressure, the photoelectric property of the tin-germanium-sulfur selenide film is greatly improved. The method is simple to operate and has universality; and the prepared high-quality tin-germanium-sulfur selenide film can be applied to photoelectric devices such as solar cells, photoelectric water cells, photoelectric detectors and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a tin-germanium sulfoselenide thin film, a preparation method thereof, and a photoelectric conversion device. Background technique [0002] With the continuous improvement of the industrialization level of human society, the total energy demand of the society continues to increase. According to the data provided by the US Department of Energy's 2017 annual energy report, the average energy consumption in the world is about 14TW. Among them, the consumption of fossil energy such as oil, natural gas and coal accounts for about 85% of the total energy consumption of human society. In the short term, the main problem facing human society is not the shortage of fossil energy reserves, but the greenhouse effect brought about by the massive consumption of fossil energy. Studies have shown that if all fossil energy sources on the earth are consumed, the carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00H01L31/032
CPCC01B19/002C01P2002/72C01P2002/82C01P2004/03H01L31/0324
Inventor 罗文俊温鑫刘建国吴聪萍邹志刚
Owner NANJING UNIV