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Sizing agent and method for preparing cuprous-sulfide-based counter electrode in sensitized solar cell

A technology of cuprous sulfide and solar cells, applied in capacitor electrodes, sulfide conductors, electrolytic capacitors, etc., can solve the problems of difficult sealing, unstable battery performance, high cost, etc., to reduce manufacturing costs, facilitate battery packaging, and enhance stability sexual effect

Active Publication Date: 2013-01-23
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these kinds of counter electrodes have certain problems. For example, the cost of the noble metal counter electrode is relatively high. Although the carbon counter electrode is cheap, its activity still cannot meet the level of high-efficiency operation of the battery. Subsulfide obtained by corroding copper sheets Although the copper counter electrode overcomes the problems of cost and activity, due to the continuous corrosion of the copper sheet by the electrolyte, the composition of the electrolyte changes and there is also a problem that it is difficult to seal during the packaging process, thus affecting the performance of the battery. Unstable, so it is difficult to meet the needs of practical use

Method used

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  • Sizing agent and method for preparing cuprous-sulfide-based counter electrode in sensitized solar cell
  • Sizing agent and method for preparing cuprous-sulfide-based counter electrode in sensitized solar cell
  • Sizing agent and method for preparing cuprous-sulfide-based counter electrode in sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] [Example 1]: Preparation of cuprous sulfide counter electrode in situ

[0023] Using solvothermal method to deposit cuprous sulfide in situ on the surface of transparent conductive glass, the reaction conditions are ethylene glycol as solvent, 20mM copper acetate and 10mM thiourea as reactants, solvothermal deposition at 180℃ for 5 hours; then take it out The transparent conductive glass is rinsed with pure water and dried under vacuum at 60°C for 12 hours to obtain the cuprous sulfide counter electrode.

[0024] Assemble the counter electrode of Example 1 into a battery for photoelectric conversion efficiency test. The photoanode is a nano-titanium dioxide porous film, the sensitized quantum dots are CdS and CdSe, and the electrolyte is an aqueous solution of 1M sodium sulfide and 1M elemental sulfur. The test results As shown in Table 1. As a comparison, platinum (pyrolysis), gold (thermal vapor deposition), carbon (scratch coating) are deposited on the conductive glass. ...

Embodiment 2～51

[0028] [Examples 2~51]: Preparation of cuprous sulfide counter electrode using slurry containing cuprous sulfide

[0029] Disperse cuprous sulfide in different types and contents of solvents according to the different mass fractions shown in Table 2 to prepare a slurry; then use high-pressure spraying to deposit the slurry on the surface of graphite paper heated to 120°C , Get the counter electrode. The counter electrode was assembled into a battery according to the method of Example 1 to test its battery efficiency, and the results are as follows.

[0030] Table 2

[0031]

[0032]

[0033]

[0034] It can be seen from the above results that the battery performance is excellent when cuprous sulfide is deposited on the graphite substrate as the counter electrode, and the mass percentage is preferably 45%-85%, more preferably 55%-65%.

Embodiment 52～69

[0035] [Examples 52-69]: Preparation of cuprous sulfide counter electrode using slurry containing cuprous sulfide, binder and surfactant

[0036] According to the ratio in Table 2, the slurry was prepared with glycerol as the solvent, and then the slurry was screen-printed on flexible ITO / PET, and dried at 80°C to prepare the cuprous sulfide counter electrode. The battery was assembled into a battery according to the method of Example 1 and the battery efficiency was tested. The test results are shown below.

[0037] table 3

[0038]

[0039]

[0040] The above-mentioned Tx-100 is an abbreviation of the commercially available surfactant TritonX 100 manufactured by Sigma-Aldrich. The above data shows that the counter electrode prepared under low temperature conditions also has good performance. This method is especially suitable for flexible substrates that are difficult to withstand high temperature processing. At the same time, due to the presence of the binder, the adhesion betwee...

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Abstract

The invention discloses a sizing agent for manufacturing a cuprous-sulfide-based counter electrode in a sensitized solar cell. The sizing agent comprises the following materials in proportion by weight: 0.01-85% of cuprous sulfide, 0-80% of complexes, 0-25% of additive and the balance of solvent, wherein the complexes is at least one selected from a carbon material or a conducting polymer. The cuprous-sulfide-based counter electrode in the invention is simple and convenient in preparation, superior in the performance, good in the stability, and suitable for the commercial quantum dot sensitized solar cell.

Description

Technical field [0001] The invention relates to the manufacturing field of quantum dot sensitized solar cells, in particular to a sensitized solar cell counter electrode with cuprous sulfide as the main active component and a manufacturing method thereof. Background technique [0002] Since mankind has entered the 21st century, the energy problems faced by mankind have become increasingly severe. All over the world are actively seeking solutions. Renewable energy has also received the attention of governments. Among them, solar energy is inexhaustible. The inexhaustible advantages have attracted much attention, so solar cells have also become a hot spot in the field of new energy research. Dye-sensitized solar cell (DSC), as a new type of solar cell developed in recent years, has triggered a global research boom with its excellent performance and economical and convenient preparation method. However, due to dye price factors, the further reduction of DSC cost is limited. Recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01B1/10H01G9/04H01G9/042H01G9/20H01M14/00H01L51/44H01L51/46H01L51/48
CPCY02E10/50Y02E10/549Y02P70/50
Inventor 孟庆波邓明晖李冬梅罗艳红
Owner INST OF PHYSICS - CHINESE ACAD OF SCI