Slurry and method for preparing cuprous sulfide counter electrode in sensitized solar cell

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

Active Publication Date: 2011-12-28
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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  • Slurry and method for preparing cuprous sulfide counter electrode in sensitized solar cell
  • Slurry and method for preparing cuprous sulfide counter electrode in sensitized solar cell
  • Slurry and method for preparing cuprous sulfide 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] Use 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°C for 5 hours; then take out Transparent conductive glass, washed with pure water and then vacuum-dried at 60°C for 12 hours to obtain a cuprous sulfide counter electrode.

[0024] The counter electrode of the above-mentioned embodiment 1 is assembled into a battery for photoelectric conversion efficiency testing, wherein the photoanode is a porous nano-titanium dioxide 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 method), gold (thermal evaporation), carbon (scratch coating method) ...

Embodiment 2～51

[0028] [Example 2-51]: Using a slurry containing cuprous sulfide to prepare a cuprous sulfide counter electrode

[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 , to get the counter electrode. The counter electrode was assembled into a battery according to the method of the above-mentioned 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 when the cuprous sulfide is deposited on the graphite substrate as the counter electrode, the battery performance is excellent, and the mass percentage is preferably 45% to 85%, more preferably 55% to 65%.

Embodiment 52～69

[0035] [Example 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 screen-printed on the flexible ITO / PET, and dried at 80°C to prepare the cuprous sulfide counter electrode. The battery was assembled according to the method of the above-mentioned Example 1 to test the battery efficiency, and the test results are as follows.

[0037] table 3

[0038]

[0039]

[0040] The above Tx-100 is an abbreviation for TritonX 100, a commercially available surfactant manufactured by Sigma-Aldrich Corporation. The above data show 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 treatment. At the same time, due to the presence of the binder, the bond between ...

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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 field of manufacturing 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 the beginning of the 21st century, the energy problems faced by human beings have become increasingly severe, and the world is actively seeking solutions. Therefore, renewable energy has also attracted the attention of governments in various countries, among which solar energy is inexhaustible and widely used. The inexhaustible advantages have attracted much attention, so solar cells have become a hot spot in the field of new energy research. As a new type of solar cell developed in recent years, dye-sensitized solar cell (DSC) has triggered a worldwide research boom due to its excellent performance and economical and convenient preparation methods. However, due to the price of dyes, the...

Claims

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Application Information

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