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Precursor for preparing light-absorbing layer of solar cell and method for manufacturing same

一种太阳能电池、光吸收层的技术，应用在应用、电路、光伏发电等方向，能够解决不充分、不均匀混合、金属纳米颗粒易被氧化等问题

Active Publication Date: 2017-05-31
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, disadvantageously, metal nanoparticles composed of a single metal element may be easily oxidized, and subsequently require an additional process of removing the oxide at high temperature using a large amount of Se
In addition, when chalcogenides containing the respective metals are separately synthesized and used in combination in the process of preparing an ink or with metal nanoparticles, uneven metal composition ratios may cause problems and there is a gap between metal nanoparticles having different phases. Inadequate mixing may result in secondary phase formation in the film

Method used

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  • Precursor for preparing light-absorbing layer of solar cell and method for manufacturing same
  • Precursor for preparing light-absorbing layer of solar cell and method for manufacturing same
  • Precursor for preparing light-absorbing layer of solar cell and method for manufacturing same

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Embodiment 2

[0133] Will contain 15mmol CuCl 2 and 10mmol SnCl 2 The aqueous solution was slowly added dropwise to 150mmolNaBH at 50°C 4 distilled aqueous solution, and the mixture was stirred for 3 hours to prepare the 6 sn 5 and Cu-rich Cu-Sn (such as Cu 3 Sn, Cu 10 sn 3 or Cu 41 sn 11 ) mixture of Cu-Sn bimetallic nanoparticles.

[0134] A solution of 11 mmol zinc acetate in 50 ml distilled water was added to the dispersion of Cu—Sn bimetallic nanoparticles, followed by stirring for 30 minutes. Then, 20mmol Na in 100ml distilled water 2 The solution of S was added to the stirred solution at one time, and the mixture was reacted for 3 hours to prepare an aggregate phase complex including Cu—Sn phase and ZnS phase.

Embodiment 3

[0136] Will contain 20mmol CuCl 2 and 10mmol SnCl 2 The mixed solution was added dropwise at 80 °C to a solution containing 150 mmol NaBH 4 DMSO solution for 1 hour, the mixture was stirred for 24 hours, and the formed particles were purified by centrifugation to prepare Cu-containing 6.26 sn 5 and Cu 10 sn 3 Mixed-phase Cu-Sn bimetallic nanoparticles.

[0137] A solution of 1 g of polyvinylpyrrolidone in 50 ml of ethanol was added to the dispersion of Cu—Sn bimetallic nanoparticles in ethanol, followed by stirring for 1 hour. A solution of 12 mmol zinc acetate in 100 ml ethanol was added to the stirred mixture, followed by further stirring for 1 hour. A solution of 12 mmol thiourea in 50 ml ethanol was slowly added dropwise to the stirred mixture for 1 hour, and the resulting mixture was heated to 50° C. to prepare core-shell structured nanoparticles comprising Cu—Sn bimetallic particles and a ZnS phase. Transmission electron microscope (TEM) images of the precursors f...

Embodiment 4

[0139] Will contain 18mmol CuCl 2 , 10mmol SnCl 2 And the mixed aqueous solution of 50mmol trisodium citrate was slowly added dropwise to the solution containing 120mmol NaBH 4 in aqueous solution for 1 hour, the mixture was reacted under stirring for 24 hours, and the formed particles were purified by centrifugation to prepare Cu-containing 6 sn 5 and Cu 41 sn 11 A mixture of Cu-Sn bimetallic nanoparticles.

[0140] After dispersing the Cu-Sn bimetallic nanoparticles in 100 ml of distilled water, an aqueous solution containing 11 mmol of zinc acetate and an aqueous solution containing 12 mmol of NaHSe were sequentially added dropwise to the dispersion to prepare an aggregate phase composite containing Cu-Sn phase and ZnSe phase body.

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Abstract

The present invention relates to a precursor for preparing a light-absorbing layer of a solar cell and a method for manufacturing the same, the precursor being characterized by comprising: (a) an aggregate-phase composite including a first phase composed of a copper (Cu)-tin (Sn) bimetallic metal and a second phase composed of zinc (Zn)-containing chalcogenide, or including a first phase composed of a Cu-Sn bimetallic metal, a second phase composed of Zn-containing chalcogenide, and a third phase composed of Cu-containing chalcogenide; (b) a nanoparticle having a core-shell structure including a core composed of Cu-Sn bimetallic metal nanoparticles and a shell composed of Zn-containing chalcogenide or composed of Zn-containing chalcogenide and Cu-containing chalcogenide; or (c) a mixture thereof.

Description

technical field [0001] This application claims the benefits of Korean Patent Application No. 10-2014-0152663 filed with the Korean Intellectual Property Office on November 5, 2014 and Korean Patent Application No. 10-2015-0066497 filed with the Korean Intellectual Property Office on May 13, 2015 Interest, the disclosure of which is incorporated herein by reference in its entirety. [0002] The present invention relates to a precursor for preparing a light-absorbing layer of a solar cell and a method for preparing the same. Background technique [0003] Solar cells have been manufactured using a light absorbing layer formed at high cost and silicon (Si) as a semiconductor material from the early stage of its development. To more economically manufacture industrially viable solar cells, the use of inexpensive light-absorbing materials such as copper indium gallium(di)selenium (CIGS) or Cu(In,Ga)(S,Se) has been developed. 2 ) thin-film solar cell structure. Such CIGS-based s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/04H01L31/18C09D11/00
CPCC09D11/00H01L31/0216H01L31/04H01L31/18C09D11/52H01L31/0322Y02E10/541Y02P70/50H01L31/0445H01L31/022425H01L31/0326H01L31/1864
Inventor 尹锡喜朴银珠李豪燮尹锡炫
Owner LG CHEM LTD
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