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A kind of tin oxide nanocrystal and its preparation method and solar cell preparation method

A tin oxide nanocrystal, solar cell technology, applied in tin oxide, nanotechnology, nanotechnology and other directions, can solve the problems of increasing the fabrication cost and process difficulty of solar cell devices, limiting applications, poor conductivity, etc.

Active Publication Date: 2021-09-14
ANSHAN HIFICHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used electron transport layer in perovskite solar cells is TiO 2 ; however, it suffers from poor electrical conductivity and low electron mobility
In order to improve its conductivity, it is usually necessary to undergo high-temperature annealing above 450 ° C, which increases the preparation cost and process difficulty of solar cell devices, and also limits its application in flexible devices.
In addition, since TiO 2 Under prolonged exposure to UV light, electrons will be confined to TiO 2 In the deep defect energy level of the battery, it recombines with the holes inside the battery, causing the attenuation of battery performance and hindering the practical application of perovskite batteries.

Method used

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  • A kind of tin oxide nanocrystal and its preparation method and solar cell preparation method
  • A kind of tin oxide nanocrystal and its preparation method and solar cell preparation method
  • A kind of tin oxide nanocrystal and its preparation method and solar cell preparation method

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preparation example Construction

[0040] The invention provides a method for preparing tin oxide nanocrystals, comprising the steps of:

[0041] Take the reaction raw material and add (CH 2 Oh) 2 Made into a solution, the reaction raw materials include: SnCl 4 ·5H 2 O, SnCl 2 2H 2 O, C 4 h 6 o 4 Sn and C 8 h 12 o 8 At least one of Sn, the molar concentration of Sn ions in the solution is 0.1-3mol / L; the reaction raw materials also include doping elements, and the doping elements include any one of Sb, In, and Nb , the molar ratio of the doping element to Sn is 0:4 to 1:4;

[0042] Add glacial acetic acid and ammonia water to adjust the pH value of the solution to 7-10, CH in glacial acetic acid 3 COOH and NH in ammonia 3 ·H 2 The molar ratio of O is 1:1.5 to 1:5;

[0043] React the solution at a temperature of 60-190°C for 10-90 minutes to form a colloidal solution;

[0044] The colloidal solution obtained after the reaction is cleaned according to the following steps:

[0045] a. Add C to the...

Embodiment 1

[0058] This embodiment provides a method for preparing tin oxide nanocrystals, comprising the following steps:

[0059] Take SnCl 4 ·5H 2 OJoin (CH 2 Oh) 2 A solution is made in the solution, and the molar concentration of Sn in the solution is 0.1mol / L;

[0060] Add glacial acetic acid and ammonia water to adjust the pH value of the solution to 7, CH in glacial acetic acid 3 COOH and NH in ammonia 3 ·H 2 The molar ratio of O is 1:1.5;

[0061] Allow the solution to react at a temperature of 60°C for 90 minutes to generate a white colloidal solution;

[0062] The white colloidal solution obtained after the reaction is cleaned according to the following steps:

[0063] a. Add (CH 3 ) 2 CHOH and mix well;

[0064] b. The mixed solution was centrifuged at a speed of 2000r / min for 20 minutes;

[0065] c. Remove the upper layer solution after centrifugation, and keep the lower white precipitate;

[0066] The solution of the white precipitate obtained in step c is circu...

Embodiment 2

[0069] This embodiment provides a method for preparing tin oxide nanocrystals, comprising the following steps:

[0070] Take SnCl 4 ·5H 2 OJoin (CH 2 Oh) 2 A solution is made in the solution, and the molar concentration of Sn in the solution is 0.1mol / L;

[0071] Add glacial acetic acid and ammonia water to adjust the pH value of the solution to 7.5, CH in glacial acetic acid 3 COOH and NH in ammonia 3 ·H 2 The molar ratio of O is 1:2;

[0072] Allow the solution to react at a temperature of 80°C for 80 minutes to generate a white colloidal solution;

[0073] The white colloidal solution obtained after the reaction is cleaned according to the following steps:

[0074] a. Add (CH 3 ) 2 CHOH and mix well;

[0075] b. The mixed solution was centrifuged at a speed of 4000r / min for 16 minutes;

[0076] c. Remove the upper layer solution after centrifugation, and keep the lower white precipitate;

[0077] The solution of the white precipitate obtained in step c is circu...

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Abstract

The invention discloses a method for preparing tin oxide nanocrystals, which comprises the following steps: taking reaction raw materials and adding (CH 2 OH) 2 A solution is made in the reaction raw materials, and the reaction raw materials include SnCl 4 ·5H 2 O or SnCl 2 ·2H 2 At least one of O, the molar concentration of Sn in the solution is 0.1-3 mol / L; the reaction raw materials in the solution are reacted to generate a white precipitate; the white precipitate is cleaned and dried to obtain tin oxide nanocrystals. The present application also provides a method for preparing a solar cell based on the tin oxide nanocrystals prepared by the method. The prepared solar cell can have good electrical conductivity and high photoelectric conversion efficiency after low temperature annealing treatment.

Description

technical field [0001] The invention relates to the field of perovskite solar cell production, in particular to a tin oxide nanocrystal, a preparation method thereof, and a solar cell preparation method. Background technique [0002] Flat-panel perovskite cells have attracted more and more attention due to their simple structure, low fabrication cost, and favorable industrialization. An ideal electron transport layer is an important part of a high-efficiency planar perovskite cell, which plays a key role in transporting electrons and inhibiting recombination, and can achieve high Voc (open circuit voltage) and FF (fill factor). [0003] At present, the most commonly used electron transport layer in perovskite solar cells is TiO 2 ; however, it suffers from poor electrical conductivity and low electron mobility. In order to improve its electrical conductivity, it usually needs to be annealed at a high temperature above 450°C, which increases the manufacturing cost and proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/02C03C17/3644C01P2004/04C01P2004/64H10K71/00H10K30/30H10K2102/00Y02E10/549
Inventor 吕银花蔡冰王鹏张志群
Owner ANSHAN HIFICHEM CO LTD
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